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[Cyberpedia](https://www.paloaltonetworks.com/cyberpedia?ts=markdown) 2. [Threats](https://www.paloaltonetworks.com/cyberpedia/threat?ts=markdown) 3. [Cyber Attack](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack?ts=markdown) 4. [What Is an Advanced Persistent Threat?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt?ts=markdown) Table of Contents * [What Is a Cyber Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack?ts=markdown) * [Threat Overview: Cyber Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#threat?ts=markdown) * [Cyber Attack Types at a Glance](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#cyber?ts=markdown) * [Global Cyber Attack Trends](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#global?ts=markdown) * [Cyber Attack Taxonomy](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#taxonomy?ts=markdown) * [Threat-Actor Landscape](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#landscape?ts=markdown) * [Attack Lifecycle and Methodologies](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#methodologies?ts=markdown) * [Technical Deep Dives](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#technical?ts=markdown) * [Cyber Attack Case Studies](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#studies?ts=markdown) * [Tools, Platforms, and Infrastructure](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#tools?ts=markdown) * [The Effect of Cyber Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#effect?ts=markdown) * [Detection, Response, and Intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#detection?ts=markdown) * [Emerging Cyber Attack Trends](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#trends?ts=markdown) * [Testing and Validation](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#testing?ts=markdown) * [Metrics and Continuous Improvement](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#metrics?ts=markdown) * [Cyber Attack FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack#faqs?ts=markdown) * [What Is a Zero-Day Attack? Risks, Examples, and Prevention](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention?ts=markdown) * [Zero-Day Attacks Explained](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#explained?ts=markdown) * [Zero-Day Vulnerability vs. Zero-Day Attack vs. CVE](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#vs?ts=markdown) * [How Zero-Day Exploits Work](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#how?ts=markdown) * [Common Zero-Day Attack Vectors](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#common?ts=markdown) * [Why Zero-Day Attacks Are So Effective and Their Consequences](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#why?ts=markdown) * [How to Prevent and Mitigate Zero-Day Attacks](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#prevent?ts=markdown) * [The Role of AI in Zero-Day Defense](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#role?ts=markdown) * [Real-World Examples of Zero-Day Attacks](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#examples?ts=markdown) * [Zero-Day Attacks FAQs](https://www.paloaltonetworks.com/cyberpedia/zero-day-attacks-explained-risks-examples-prevention#faqs?ts=markdown) * [What Is Lateral Movement?](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement?ts=markdown) * [Why Attackers Use Lateral Movement](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#why?ts=markdown) * [How Do Lateral Movement Attacks Work?](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#how?ts=markdown) * [Stages of a Lateral Movement Attack](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#stages?ts=markdown) * [Techniques Used in Lateral Movement](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#technicques?ts=markdown) * [Detection Strategies for Lateral Movement](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#detection?ts=markdown) * [Tools to Prevent Lateral Movement](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#tools?ts=markdown) * [Best Practices for Defense](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#best?ts=markdown) * [Recent Trends in Lateral Movement Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#recent?ts=markdown) * [Industry-Specific Challenges](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#industry?ts=markdown) * [Compliance and Regulatory Requirements](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#compliance?ts=markdown) * [Financial Impact and ROI Considerations](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#financial?ts=markdown) * [Common Mistakes to Avoid](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#common?ts=markdown) * [Lateral Movement FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement#faqs?ts=markdown) * [What is a Botnet?](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet?ts=markdown) * [How Botnets Work](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#how?ts=markdown) * [Why are Botnets Created?](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#why?ts=markdown) * [What are Botnets Used For?](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#what?ts=markdown) * [Types of Botnets](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#types?ts=markdown) * [Signs Your Device May Be in a Botnet](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#signs?ts=markdown) * [How to Protect Against Botnets](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#protect?ts=markdown) * [Why Botnets Lead to Long-Term Intrusions](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#intrusions?ts=markdown) * [How To Disable a Botnet](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#disable?ts=markdown) * [Tools and Techniques for Botnet Defense](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#tools?ts=markdown) * [Real-World Examples of Botnets](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#examples?ts=markdown) * [Botnet FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-botnet#faqs?ts=markdown) * [What is a Payload-Based Signature?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-payload-based-signature?ts=markdown) * [Importance of Payload-Based Signatures](https://www.paloaltonetworks.com/cyberpedia/what-is-a-payload-based-signature#important?ts=markdown) * [How Payload-Based Signatures Work](https://www.paloaltonetworks.com/cyberpedia/what-is-a-payload-based-signature#how?ts=markdown) * [Advantages of Payload-Based Signatures](https://www.paloaltonetworks.com/cyberpedia/what-is-a-payload-based-signature#advantages?ts=markdown) * [Use Cases of Payload-Based Signatures in Cybersecurity](https://www.paloaltonetworks.com/cyberpedia/what-is-a-payload-based-signature#usecases?ts=markdown) * [Payload-Based Signatures FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-payload-based-signature#faqs?ts=markdown) * [Dark Web Leak Sites: Key Insights for Security Decision Makers](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site?ts=markdown) * [Dark Web Leak Sites Explained](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#dark?ts=markdown) * [Evolving Extortion Tactics](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#tactics?ts=markdown) * [The Role of Leak Sites in Ransomware Double Extortion](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#role?ts=markdown) * [Critical Risks Exposed by Data Leak Sites](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#critical?ts=markdown) * [Anatomy of a Dark Web Leak Site](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#anatomy?ts=markdown) * [Proactive Defense: How Organizations Can Mitigate Dark Web Leaks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#proactive?ts=markdown) * [Dark Web Leak Site FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#faqs?ts=markdown) * [What to Do If Your Organization Appears on a Dark Web Leak Site](https://www.paloaltonetworks.com/cyberpedia/what-is-a-dark-web-leak-site#appears?ts=markdown) * [What is Spyware?](https://www.paloaltonetworks.com/cyberpedia/what-is-spyware?ts=markdown) * [Cybercrime: The Underground Economy](https://www.paloaltonetworks.com/cyberpedia/cybercrime-the-underground-economy?ts=markdown) * [Products](https://www.paloaltonetworks.com/cyberpedia/cybercrime-the-underground-economy#products?ts=markdown) * [Services](https://www.paloaltonetworks.com/cyberpedia/cybercrime-the-underground-economy#services?ts=markdown) * [Cybercrime FAQs](https://www.paloaltonetworks.com/cyberpedia/cybercrime-the-underground-economy#faqs?ts=markdown) * [What Is Cross-Site Scripting (XSS)?](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting?ts=markdown) * [XSS Explained](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#xss?ts=markdown) * [Evolution in Attack Complexity](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#evolution?ts=markdown) * [Anatomy of a Cross-Site Scripting Attack](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#anatomy?ts=markdown) * [Integration in the Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#integration?ts=markdown) * [Widespread Exposure in the Wild](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#widespread?ts=markdown) * [Cross-Site Scripting Detection and Indicators](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#indicators?ts=markdown) * [Prevention and Mitigation](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#mitigation?ts=markdown) * [Response and Recovery Post XSS Attack](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#response?ts=markdown) * [Strategic Cross-Site Scripting Risk Perspective](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#strategic?ts=markdown) * [Cross-Site Scripting FAQs](https://www.paloaltonetworks.com/cyberpedia/xss-cross-site-scripting#faqs?ts=markdown) * [What Is a Dictionary Attack?](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack?ts=markdown) * [Dictionary Attack Explained](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#dictionary?ts=markdown) * [How Dictionary Attacks Work](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#how?ts=markdown) * [Dictionary Attack in the Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#lifecycle?ts=markdown) * [Dictionary Attack in the Real World](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#examples?ts=markdown) * [Dictionary Attack Detection and Indicators](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#indicators?ts=markdown) * [Preventing and Mitigating Dictionary Attack](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#preventing?ts=markdown) * [Attack Response and Recovery](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#recovery?ts=markdown) * [Dictionary Attack FAQs](https://www.paloaltonetworks.com/cyberpedia/dictionary-attack#faqs?ts=markdown) * [What Is a Credential-Based Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack?ts=markdown) * [Credential-Based Attack Overview](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack#credential?ts=markdown) * [How Credential-Based Attacks Work](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack#how?ts=markdown) * [Variations on Credential-Based Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack#variations?ts=markdown) * [Preventing Credential-Based Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack#preventing?ts=markdown) * [Credential-Based Attack FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack#faqs?ts=markdown) * [What Is a Denial of Service (DoS) Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos?ts=markdown) * [How Denial-of-Service Attacks Work](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#how?ts=markdown) * [Denial-of-Service in Adversary Campaigns](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#denial?ts=markdown) * [Real-World Denial-of-Service Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#attacks?ts=markdown) * [Detection and Indicators of Denial-of-Service Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#detection?ts=markdown) * [Prevention and Mitigation of Denial-of-Service Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#prevention?ts=markdown) * [Response and Recovery from Denial-of-Service Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#response?ts=markdown) * [Operationalizing Denial-of-Service Defense](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#defense?ts=markdown) * [DoS Attack FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-denial-of-service-attack-dos#faqs?ts=markdown) * [What Is Hacktivism?](https://www.paloaltonetworks.com/cyberpedia/hacktivism?ts=markdown) * [Hacktivism Explained](https://www.paloaltonetworks.com/cyberpedia/hacktivism#explained?ts=markdown) * [Origins and Definitions](https://www.paloaltonetworks.com/cyberpedia/hacktivism#origins?ts=markdown) * [Forms and Methods](https://www.paloaltonetworks.com/cyberpedia/hacktivism#forms?ts=markdown) * [Related Practices](https://www.paloaltonetworks.com/cyberpedia/hacktivism#related?ts=markdown) * [Who Do Hacktivists Target?](https://www.paloaltonetworks.com/cyberpedia/hacktivism#who?ts=markdown) * [What Motivates Hacktivists?](https://www.paloaltonetworks.com/cyberpedia/hacktivism#what?ts=markdown) * [Is Hacktivism Ethical?](https://www.paloaltonetworks.com/cyberpedia/hacktivism#ethical?ts=markdown) * [Hacktivism FAQs](https://www.paloaltonetworks.com/cyberpedia/hacktivism#faqs?ts=markdown) * [What Is a DDoS Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack?ts=markdown) * [Threat Overview](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#threat?ts=markdown) * [How Distributed Denial-of-Service Attacks Work](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#how?ts=markdown) * [DDoS in Multistage Attack Campaigns](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#ddos?ts=markdown) * [Real-World DDoS Incidents and Organizational Impact](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#impact?ts=markdown) * [DDoS Attack Detection Indicators](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#indicators?ts=markdown) * [DDoS Prevention and Mitigation](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#mitigation?ts=markdown) * [DDoS Response and Recovery](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#recovery?ts=markdown) * [Distributed Denial of Service FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-ddos-attack#faqs?ts=markdown) * [What Is CSRF (Cross-Site Request Forgery)?](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery?ts=markdown) * [CSRF Explained](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#csrf?ts=markdown) * [How Cross-Site Request Forgery Works](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#how?ts=markdown) * [Where CSRF Fits in the Broader Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#where?ts=markdown) * [CSRF in Real-World Exploits](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#exploits?ts=markdown) * [Detecting CSRF Through Behavioral and Telemetry Signals](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#detecting?ts=markdown) * [Defending Against Cross-Site Request Forgery](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#defending?ts=markdown) * [Responding to a CSRF Incident](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#responding?ts=markdown) * [CSRF as a Strategic Business Risk](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#risk?ts=markdown) * [Key Priorities for CSRF Defense and Resilience](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#key?ts=markdown) * [Cross-Site Request Forgery FAQs](https://www.paloaltonetworks.com/cyberpedia/csrf-cross-site-request-forgery#faqs?ts=markdown) * [What Is Spear Phishing?](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing?ts=markdown) * [Spear Phishing Email Tactics](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#what?ts=markdown) * [How Does Spear Phishing Work?](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#how?ts=markdown) * [Types of Spear Phishing Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#types?ts=markdown) * [Examples of Spear Phishing Attacks](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#examples?ts=markdown) * [How to Protect Yourself from Spear Phishing](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#protect?ts=markdown) * [If You Fall Victim to Spear Phishing](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#victim?ts=markdown) * [Spear Phishing FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing#faq?ts=markdown) * [What Is Brute Force?](https://www.paloaltonetworks.com/cyberpedia/brute-force?ts=markdown) * [How Brute Force Functions as a Threat](https://www.paloaltonetworks.com/cyberpedia/brute-force#how?ts=markdown) * [How Brute Force Works in Practice](https://www.paloaltonetworks.com/cyberpedia/brute-force#practice?ts=markdown) * [Brute Force in Multistage Attack Campaigns](https://www.paloaltonetworks.com/cyberpedia/brute-force#brute?ts=markdown) * [Real-World Brute Force Campaigns and Outcomes](https://www.paloaltonetworks.com/cyberpedia/brute-force#outcomes?ts=markdown) * [Detection Patterns in Brute Force Attacks](https://www.paloaltonetworks.com/cyberpedia/brute-force#detection?ts=markdown) * [Practical Defense Against Brute Force Attacks](https://www.paloaltonetworks.com/cyberpedia/brute-force#defense?ts=markdown) * [Response and Recovery After a Brute Force Incident](https://www.paloaltonetworks.com/cyberpedia/brute-force#response?ts=markdown) * [Brute Force Attack FAQs](https://www.paloaltonetworks.com/cyberpedia/brute-force#faqs?ts=markdown) * [What is a Command and Control Attack?](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained?ts=markdown) * [How a Command and Control Attack Works](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained#how?ts=markdown) * [Types of Command and Control Techniques](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained#types?ts=markdown) * [Devices Targeted by C\&C](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained#devices?ts=markdown) * [What Hackers Can Accomplish Through Command and Control](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained#what?ts=markdown) * [Command and Control FAQs](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained#faqs?ts=markdown) * What Is an Advanced Persistent Threat? * [Characteristics of Advanced Persistent Threats](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#characteristics?ts=markdown) * [What Techniques Are Used for APT Attacks?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#techniques?ts=markdown) * [What Are the Stages of an APT Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#stages?ts=markdown) * [What Is the Defense Against APT?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#defense?ts=markdown) * [Real-World Example of an APT Attack](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#realworld?ts=markdown) * [Advanced Persistent Threat FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#faqs?ts=markdown) * [What is an Exploit Kit?](https://www.paloaltonetworks.com/cyberpedia/what-is-an-exploit-kit?ts=markdown) * [Landing Page](https://www.paloaltonetworks.com/cyberpedia/what-is-an-exploit-kit#landing?ts=markdown) * [Exploit](https://www.paloaltonetworks.com/cyberpedia/what-is-an-exploit-kit#exploit?ts=markdown) * [Payload](https://www.paloaltonetworks.com/cyberpedia/what-is-an-exploit-kit#payload?ts=markdown) * [What Is Credential Stuffing?](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing?ts=markdown) * [Credential Stuffing Explained](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing#credential?ts=markdown) * [Automated Exploitation of Reused Credentials](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing#automated?ts=markdown) * [Integration in the Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing#integration?ts=markdown) * [Credential Stuffing Attacks in the Real World](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing#stuffing?ts=markdown) * [Responding and Recovering from Credential Stuffing](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing#responding?ts=markdown) * [Credential Stuffing FAQs](https://www.paloaltonetworks.com/cyberpedia/credential-stuffing#faqs?ts=markdown) * [What Is Smishing?](https://www.paloaltonetworks.com/cyberpedia/what-is-smishing?ts=markdown) * [How to Spot a Smishing Attempt](https://www.paloaltonetworks.com/cyberpedia/what-is-smishing#spot-smishing-attempt?ts=markdown) * [How to Avoid Being Smished](https://www.paloaltonetworks.com/cyberpedia/what-is-smishing#avoid-being-smished?ts=markdown) * [Smishing FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-smishing#faqs?ts=markdown) * [What is Social Engineering?](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering?ts=markdown) * [The Role of Human Psychology in Social Engineering](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#role?ts=markdown) * [How Has Social Engineering Evolved?](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#historical?ts=markdown) * [How Does Social Engineering Work?](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#how?ts=markdown) * [Phishing vs Social Engineering](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#phishing?ts=markdown) * [What is BEC (Business Email Compromise)?](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#bec?ts=markdown) * [Notable Social Engineering Incidents](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#notable?ts=markdown) * [Social Engineering Prevention](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#social?ts=markdown) * [Consequences of Social Engineering](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#consequences?ts=markdown) * [Social Engineering FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering#faqs?ts=markdown) * [What Is a Honeypot?](https://www.paloaltonetworks.com/cyberpedia/honeypots?ts=markdown) * [Threat Overview: Honeypot](https://www.paloaltonetworks.com/cyberpedia/honeypots#threat?ts=markdown) * [Honeypot Exploitation and Manipulation Techniques](https://www.paloaltonetworks.com/cyberpedia/honeypots#honeypot?ts=markdown) * [Positioning Honeypots in the Adversary Kill Chain](https://www.paloaltonetworks.com/cyberpedia/honeypots#positioning?ts=markdown) * [Honeypots in Practice: Breaches, Deception, and Blowback](https://www.paloaltonetworks.com/cyberpedia/honeypots#blowback?ts=markdown) * [Detecting Honeypot Manipulation and Adversary Tactics](https://www.paloaltonetworks.com/cyberpedia/honeypots#tactics?ts=markdown) * [Safeguards Against Honeypot Abuse and Exposure](https://www.paloaltonetworks.com/cyberpedia/honeypots#safeguards?ts=markdown) * [Responding to Honeypot Exploitation or Compromise](https://www.paloaltonetworks.com/cyberpedia/honeypots#compromise?ts=markdown) * [Honeypot FAQs](https://www.paloaltonetworks.com/cyberpedia/honeypots#faqs?ts=markdown) * [What Is Password Spraying?](https://www.paloaltonetworks.com/cyberpedia/password-spraying?ts=markdown) * [Password Spraying Explained](https://www.paloaltonetworks.com/cyberpedia/password-spraying#password?ts=markdown) * [How Password Spraying Works](https://www.paloaltonetworks.com/cyberpedia/password-spraying#works?ts=markdown) * [Password Spraying in the Broader Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/password-spraying#attack?ts=markdown) * [Real-World Examples of Password Spraying Attacks](https://www.paloaltonetworks.com/cyberpedia/password-spraying#realworld?ts=markdown) * [Detection and Indicators](https://www.paloaltonetworks.com/cyberpedia/password-spraying#detection?ts=markdown) * [Preventing and Mitigating Password Spraying Attacks](https://www.paloaltonetworks.com/cyberpedia/password-spraying#mitigating?ts=markdown) * [Responding to Password Spraying](https://www.paloaltonetworks.com/cyberpedia/password-spraying#responding?ts=markdown) * [Password Spraying FAQs](https://www.paloaltonetworks.com/cyberpedia/password-spraying#faqs?ts=markdown) * [How to Break the Cyber Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle?ts=markdown) * [1. Reconnaissance:](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#reconnaissance?ts=markdown) * [2. Weaponization and Delivery:](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#weaponization?ts=markdown) * [3. Exploitation:](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#exploitation?ts=markdown) * [4. Installation:](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#installation?ts=markdown) * [5. Command and Control:](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#command?ts=markdown) * [6. Actions on the Objective:](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#actions?ts=markdown) * [Cyber Attack Lifecycle FAQs](https://www.paloaltonetworks.com/cyberpedia/how-to-break-the-cyber-attack-lifecycle#faqs?ts=markdown) * [What Is Phishing?](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing?ts=markdown) * [Phishing Explained](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#phishing?ts=markdown) * [The Evolution of Phishing](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#?ts=markdown) * [The Anatomy of a Phishing Attack](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#anatomy?ts=markdown) * [Why Phishing Is Difficult to Detect](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#detect?ts=markdown) * [Types of Phishing](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#types?ts=markdown) * [Phishing Adversaries and Motives](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#motives?ts=markdown) * [The Psychology of Exploitation](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#psychology?ts=markdown) * [Lessons from Phishing Incidents](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#lessons?ts=markdown) * [Building a Modern Security Stack Against Phishing](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#building?ts=markdown) * [Building Organizational Immunity](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#immunity?ts=markdown) * [Phishing FAQ](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing#faqs?ts=markdown) * [What Is a Rootkit?](https://www.paloaltonetworks.com/cyberpedia/rootkit?ts=markdown) * [Rootkit Classification and Technical Definition](https://www.paloaltonetworks.com/cyberpedia/rootkit#rootkit?ts=markdown) * [Types of Rootkits](https://www.paloaltonetworks.com/cyberpedia/rootkit#types?ts=markdown) * [Rootkit Installation and Execution Flow](https://www.paloaltonetworks.com/cyberpedia/rootkit#installation?ts=markdown) * [Integration in the Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/rootkit#integration?ts=markdown) * [Cyberattacks Involving Rootkits in the News](https://www.paloaltonetworks.com/cyberpedia/rootkit#cyberattacks?ts=markdown) * [Rootkit Detection and Indicators](https://www.paloaltonetworks.com/cyberpedia/rootkit#indicators?ts=markdown) * [Prevention and Mitigation](https://www.paloaltonetworks.com/cyberpedia/rootkit#prevention?ts=markdown) * [Responding to Rootkit-Related Attacks](https://www.paloaltonetworks.com/cyberpedia/rootkit#responding?ts=markdown) * [Rootkit FAQs](https://www.paloaltonetworks.com/cyberpedia/rootkit#faqs?ts=markdown) * [Browser Cryptocurrency Mining](https://www.paloaltonetworks.com/cyberpedia/threat-brief-browser-cryptocurrency-mining?ts=markdown) * [How It Works](https://www.paloaltonetworks.com/cyberpedia/threat-brief-browser-cryptocurrency-mining#works?ts=markdown) * [How to Defend Against It](https://www.paloaltonetworks.com/cyberpedia/threat-brief-browser-cryptocurrency-mining#defend?ts=markdown) * [Browser Cryptocurrency Mining FAQs](https://www.paloaltonetworks.com/cyberpedia/threat-brief-browser-cryptocurrency-mining#faqs?ts=markdown) * [What Is Pretexting?](https://www.paloaltonetworks.com/cyberpedia/pretexting?ts=markdown) * [Pretexting Explained](https://www.paloaltonetworks.com/cyberpedia/pretexting#pretexting?ts=markdown) * [Evolution of the Attack Technique](https://www.paloaltonetworks.com/cyberpedia/pretexting#evolution?ts=markdown) * [How Pretexting Works](https://www.paloaltonetworks.com/cyberpedia/pretexting#how?ts=markdown) * [Integration in the Attack Lifecycle](https://www.paloaltonetworks.com/cyberpedia/pretexting#integration?ts=markdown) * [Real-World Examples](https://www.paloaltonetworks.com/cyberpedia/pretexting#examples?ts=markdown) * [Pretexting Detection Tactics in Live Environments](https://www.paloaltonetworks.com/cyberpedia/pretexting#detection?ts=markdown) * [Prevention and Mitigation](https://www.paloaltonetworks.com/cyberpedia/pretexting#mitigation?ts=markdown) * [Pretexting FAQs](https://www.paloaltonetworks.com/cyberpedia/pretexting#faqs?ts=markdown) * [What Is Cryptojacking?](https://www.paloaltonetworks.com/cyberpedia/cryptojacking?ts=markdown) * [Understanding Cryptojacking](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#understanding?ts=markdown) * [Types of Cryptojacking and Resource Abuse Attacks](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#types?ts=markdown) * [How Cryptojacking Works](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#how?ts=markdown) * [Cryptojacking in the Adversary Kill Chain](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#chain?ts=markdown) * [Real-World Cases of Cryptojacking](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#cases?ts=markdown) * [Prevention and Mitigation](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#prevention?ts=markdown) * [Response and Recovery](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#response?ts=markdown) * [Cryptojacking FAQs](https://www.paloaltonetworks.com/cyberpedia/cryptojacking#faqs?ts=markdown) # What Is an Advanced Persistent Threat? 4 min. read Table of Contents * * [Characteristics of Advanced Persistent Threats](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#characteristics?ts=markdown) * [What Techniques Are Used for APT Attacks?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#techniques?ts=markdown) * [What Are the Stages of an APT Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#stages?ts=markdown) * [What Is the Defense Against APT?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#defense?ts=markdown) * [Real-World Example of an APT Attack](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#realworld?ts=markdown) * [Advanced Persistent Threat FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#faqs?ts=markdown) 1. Characteristics of Advanced Persistent Threats * * [Characteristics of Advanced Persistent Threats](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#characteristics?ts=markdown) * [What Techniques Are Used for APT Attacks?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#techniques?ts=markdown) * [What Are the Stages of an APT Attack?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#stages?ts=markdown) * [What Is the Defense Against APT?](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#defense?ts=markdown) * [Real-World Example of an APT Attack](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#realworld?ts=markdown) * [Advanced Persistent Threat FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt#faqs?ts=markdown) An advanced persistent threat (APT) is a sophisticated, long-term [cyber attack](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cyber-attack?ts=markdown) typically conducted by highly skilled threat actors, often backed by nation-states or organized cybercriminal groups. Unlike typical cyberattacks that seek immediate disruption or financial gain, advanced persistent threats are designed for prolonged, stealthy access to a targeted network or organization. Key characteristics of APTs include: * **Advanced:** Attackers employ sophisticated techniques, exploiting zero-day vulnerabilities, custom malware, and evasion tactics to bypass traditional security defenses. * **Persistent:** The intrusion is sustained over an extended period, with attackers quietly maintaining access and presence. * **Targeted:** APT attacks specifically focus on organizations or industries with high-value information, such as governments, critical infrastructure, or enterprises with sensitive intellectual property. * **State-Sponsored or Highly Organized:** Often attributed to nation-states or highly skilled cybercriminal groups aiming at espionage or sabotage. Typical goals of APTs are espionage, data theft, sabotage, or maintaining long-term strategic advantages. ![Defense Contractor Contains APT with Unit 42 Incident Response Expertise](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/advanced-persistent-threat-apt/video-thumbnail-defense-contractor-contains-apt-with-unit-42-incident-response-expertise.jpg) close ## Characteristics of Advanced Persistent Threats The characteristics of advanced persistent cyberthreats and the APT actors using them are outlined below. Advanced persistent threats exhibit particular characteristics that set them apart from other cyber threats, emphasizing the need for specialized defense mechanisms. ### What Makes an APT Advanced? Although APT employ familiar methods like [phishing](https://www.paloaltonetworks.com/cyberpedia/what-is-phishing?ts=markdown), mobile malware, and watering hole attacks for distributing malicious code, they possess certain traits that distinguish them as advanced cyber threats. These include: * Spending time in advance of an attack, meticulously planning and studying the target to identify high-value assets across an organization * Having multiple people use different approaches, ranging from brute force to sophisticated espionage tradecraft, to infiltrate deep into an organization's digital systems * Gaining initial network access through malicious emails and then using worms and other tactics to expand access through manual approaches * Using command-and-control malware to examine and evaluate networks and security systems to identify vulnerabilities * Attacking in multiple phases * Establishing multiple points of compromise that enable APT attackers to retain access even if the malicious activity is discovered and incident response is triggered ### What Makes an APT Persistent? Persistence is a crucial distinguishing feature of APT attacks. Notable persistent traits of APTs include: * Attacks are carried out over prolonged periods---months or even years, unlike traditional cyberattacks that last days or weeks. * Threat actors invest significant time within systems, analyzing cyber defenses and crafting targeted strategies to circumvent them before initiating their primary attack objectives. * Attackers employ evasion techniques to dodge security measures and stay hidden. ### What Makes an APT a Serious Threat? Although all cyber threats pose risks, advanced persistent threats are particularly worrisome for security teams. Besides the previously mentioned traits, APTs: * Commonly used backdoor Trojans designed to evade detection, giving threat actors ongoing access to systems. * Have specific purposes, unlike malware attacks, which are usually random and opportunistic. * Are well-funded, often by state-sponsored organizations. * Leverage well-researched, highly sophisticated social engineering tactics ![Staying Ahead of Cloud Attacks](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/advanced-persistent-threat-apt/video-thumbnail-staying-ahead-of-cloud-attacks.jpg) close ## What Techniques Are Used for APT Attacks? Despite their sophistication, APT attacks typically use a combination of sophisticated tactics and tools that usually involve manual support: * [**Spear Phishing**](https://www.paloaltonetworks.com/cyberpedia/what-is-spear-phishing?ts=markdown) -- Targeted email phishing designed to gain initial access. * **Zero-day exploits**: Leveraging unknown software vulnerabilities. * **Custom [Malware](https://www.paloaltonetworks.com/cyberpedia/what-is-malware?ts=markdown)**: Malware specifically crafted to evade detection. * [**Credential Harvesting**](https://www.paloaltonetworks.com/cyberpedia/what-is-a-credential-based-attack?ts=markdown): Using phishing or keylogging to steal credentials. * [**Lateral Movement**](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement?ts=markdown): Spreading through networks silently to avoid detection. * [**Command and Control (C2)**](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained?ts=markdown): Remote server infrastructure for ongoing attacker communication. * **Persistence Techniques**: Methods to ensure continuous presence in systems. * [**Data Exfiltration**](https://www.paloaltonetworks.com/cyberpedia/data-exfiltration?ts=markdown): Carefully extracting sensitive or valuable information unnoticed. * **Privilege Escalation**: Gaining higher-level access within the targeted organization. * [**Social Engineering**](https://www.paloaltonetworks.com/cyberpedia/what-is-social-engineering?ts=markdown): Manipulating people to gain initial access or information. ## What Are the Stages of an APT Attack? APTs are multistep, complex attacks. While there are many parts to an APT attack, this type of cyber threat is conducted in three main stages---infiltration, lateral movement, and execution. ### Stage 1: Infiltration The infiltration stage of an APT attack refers to the initial phase where adversaries gain unauthorized access to a target organization's network. The following steps outline this stage within the broader Cyber Attack Lifecycle, emphasizing the following key components:​ 1. **Reconnaissance:** Attackers conduct thorough research to identify potential vulnerabilities, often leveraging publicly available information and scanning for weaknesses in the target's infrastructure. 2. **Weaponization and Delivery:** Crafting malicious payloads, adversaries employ methods such as spear-phishing emails or exploiting software vulnerabilities to deliver these payloads to the target systems. 3. **Exploitation:** Upon successful delivery, the malicious code exploits identified vulnerabilities, enabling attackers to execute arbitrary code or gain deeper access within the network. 4. **Installation:** Attackers install malware or backdoors to establish persistent access, allowing continuous monitoring and control over compromised systems. ![This diagram shows stage 1, payload delivery, execution, and stage 2 payload delivery of the Cloaked Ursa attack.](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/advanced-persistent-threat-apt/high-level-overview-of-cloaked-ursa.png "High Level Overview of Cloaked Ursa") [Cloaked Ursa](https://unit42.paloaltonetworks.com/cloaked-ursa-online-storage-services-campaigns/) has been attributed to Russia's Foreign Intelligence Service (SVR) by both the [United States](https://media.defense.gov/2021/Apr/15/2002621240/-1/-1/0/CSA_SVR_TARGETS_US_ALLIES_UOO13234021.PDF) and the [United Kingdom](https://www.ncsc.gov.uk/news/joint-advisory-further-ttps-associated-with-svr-cyber-actors). Over the past six months, they have launched several phishing campaigns targeting foreign diplomatic missions. Cloaked Ursa has continued to evolve their abilities to deliver malware using popular online storage services. Their two most recent campaigns demonstrate their sophistication and their ability to obfuscate the deployment of their malware through the use of DropBox and Google Drive services. This is a new tactic for this actor and one that proves challenging to detect due to the ubiquitous nature of these services and the fact that they are trusted by millions of customers worldwide. ### Stage 2: Lateral Movement The lateral movement stage in APT attacks involves adversaries expanding their access within a compromised network to identify and control critical assets. This phase is crucial for attackers to achieve their objectives, such as data exfiltration or operational disruption.​ Detecting and mitigating lateral movement to prevent attackers from escalating their operations within a network is critical. #### Key Characteristics of Lateral Movement 1. **Techniques Employed:** * **Credential Theft:** Attackers may harvest credentials to impersonate authorized users, facilitating movement across systems. * **Exploitation of Trust Relationships:** Utilizing existing trust between systems to access additional resources without raising alarms. * **Use of Legitimate Tools:** Leveraging system administration tools (e.g., PsExec, WMI) to blend malicious activities with regular network traffic. 2. **Objectives:** * **Reconnaissance:** Gaining insights into network topology and identifying high-value targets. * **Data Access:** Locating and preparing sensitive data for exfiltration. * **Persistence:** Establishing multiple footholds to maintain access even if initial entry points are discovered and remediated. 3. **Detection and Mitigation Strategies:** * **Network Detection and Response (NDR):** Implementing [NDR solutions](https://www.paloaltonetworks.com/cyberpedia/what-is-network-detection-and-response?ts=markdown) can provide visibility into network traffic patterns, helping to identify anomalies indicative of lateral movement. These solutions analyze raw network packets to learn user and device behavior, unearthing attacks that blend in with legitimate activity. * **Behavioral Analytics:** Utilizing behavioral analytics to establish baselines of normal activity, enabling the detection of deviations that may signify malicious lateral movement. The approach focuses on detecting cyber threats by analyzing patterns of user, system, and network behavior, identifying anomalies such as unusual login locations or unexpected API calls. * **Advanced Threat Intelligence:** Leveraging [cyber threat intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti?ts=markdown) to stay informed about adversaries' tactics, techniques, and procedures (TTPs), facilitating proactive defense measures against known lateral movement strategies. These include understanding specific methods attackers use, such as credential theft or exploitation of trust relationships, to tailor detection mechanisms and defenses accordingly. Examine a real life case study of attackers using a second-stage binary, "Going Eagle", to perform network-based attacks: [Popping Eagle: How We Leveraged Global Analytics to Discover a Sophisticated Threat Actor](https://unit42.paloaltonetworks.com/popping-eagle-malware/) ### Stage 3: Execution The execution stage of an APT attack involves the activation of malicious payloads within a compromised environment. This phase is critical as it enables threat actors to establish control and further their objectives. #### Key Activities in the Execution Stage 1. **Payload Deployment:** Attackers introduce malware, such as Remote Access Tools (RATs) or exploit scripts, to gain active control over compromised systems. For instance, the Dark Scorpius group has been observed deploying ransomware payloads using loaders like GootLoader. Explore a list of threat actor groups tracked by Palo Alto Networks Unit 42: [Threat Actor Groups Tracked by Unit 42](https://unit42.paloaltonetworks.com/threat-actor-groups-tracked-by-palo-alto-networks-unit-42/). 2. **Privilege Escalation:** Post-compromise, attackers seek to elevate their access rights to gain control over critical systems. Techniques include exploiting system vulnerabilities or using tools like Mimikatz to harvest credentials. 3. **Command and Control ([C2](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained?ts=markdown)) Activation:** Establishing communication with external C2 servers allows attackers to issue commands, [exfiltrate data](https://www.paloaltonetworks.com/cyberpedia/data-exfiltration?ts=markdown), and deploy additional payloads. Persistent access is often maintained through web shells or other backdoor mechanisms. 4. **Persistence Mechanisms:** To maintain long-term access, attackers install backdoors or modify system configurations, ensuring their presence even after reboots or initial remediation efforts. 5. **Execution of Attack Objectives:** Depending on their goals, attackers may exfiltrate [sensitive data](https://www.paloaltonetworks.com/cyberpedia/sensitive-data?ts=markdown), disrupt operations, or conduct espionage activities. The speed of these actions has increased, with Unit 42 noting that the median time to data exfiltration in 2024 was approximately two days, emphasizing the need for rapid detection and response. ## What Is the Defense Against APT? Protecting against APTs requires a proactive and multilayered cybersecurity approach due to these threats' complex and evolving nature. Early detection and maintaining a strong cybersecurity posture are crucial in combating APTs effectively. ### Proactively Detecting APT Detecting advanced persistent threats requires security teams to be vigilant of early warning signs. Although advanced persistent threats are evasive, clues are often left that can facilitate detection, including: * Unusual activity on user accounts * Odd or uncharacteristic data access or transfer activity * Sudden increase in spear-phishing attempts * Presence of files in unusual locations * Anomalies in outbound data * Increased detection of backdoor Trojans ### Cybersecurity Best Practices to Protect Against APTs * Leverage[threat intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti?ts=markdown). * Conduct third-party [security assessments](https://www.paloaltonetworks.com/cyberpedia/what-is-a-security-threat-assessment?ts=markdown). * Develop an [incident response plan](https://www.paloaltonetworks.com/cyberpedia/incident-response-plan?ts=markdown). * Follow the principles of[Zero Trust security](https://www.paloaltonetworks.com/cyberpedia/what-is-zero-trust-network-security?ts=markdown), especially network segmentation, continuous monitoring, multi-factor authentication, and least privilege access. * Use application and domain whitelisting. * Secure remote connections. * Patch all software and install updates on time. * Filter incoming emails. ## Real-World Example of an APT Attack APTs are carried out by various entities, ranging from large state-sponsored groups to smaller organizations involved in corporate espionage and criminal networks. ### Global Tech Manufacturer Neutralizes APT Attack with Zero Downtime Law enforcement saw network traffic leaving the client environment that matched indicators for a known APT capable of being very stealthy, requiring a unique and thorough investigation. Unit 42 ensured the client experienced zero downtime during an active advanced persistent threat investigation. Our incident response experts were asked to: * Contain and eradicate the threat actor and prevent lateral movement beyond initial impact. * Identify the root cause and gauge the extent of the attack. * Enhance security controls to mitigate further damage. #### Assessment Given the nature of the threat actor, Unit 42 knew a thorough assessment was necessary, not just of the impacted environment, but also of the adjacent environments and the broader network. #### Investigation To ensure the threat actor was not hiding in plain sight, extensive threat hunting began, immediately looking for persistent access, lateral movement and data exfiltration. #### Securing the Network 24/7 threat hunting and proactive monitoring setup enabled complete visibility of activity on the network and all endpoints. #### Recovery Threat actor access was confirmed to be removed, backdoors closed, with Unit 42 able to inform the client on the totality of the impact. #### Transformation Unit 42 Identified and closed security-related visibility gaps between the parent company and impacted organization. Explore the details of the rigorous incident response approach used for a superior outcome in this case study, and another: [Global Tech Manufacturer: Unit 42 Incident Response Case Study](https://www.paloaltonetworks.ca/customers/global-tech-manufacturer-neutralizes-apt-attack-with-zero-downtime) [Defense Contractor Contains APT with Unit 42 Incident Response Expertise](https://www.paloaltonetworks.com/resources/videos/chinese-apt-attack-on-a-defense-and-technology-company?ts=markdown) ## Advanced Persistent Threat FAQs ### Is APT a type of malware? An APT is not malware itself, but a type of cyberattack or threat campaign. APTs employ various forms of malware and cyberattack techniques, including: * Trojans * Rootkits * Spyware * Keyloggers * Remote Access Tools (RATs) * Zero-day exploits ### What are the main objectives of APT attackers? The objectives of APT attacks vary by perpetrator. Among the most common include: * Stealing sensitive data to sell, such as personally identifiable information or financial account information) * Causing damage to the target organization's digital systems and assets * Gaining competitive advantages * Executing broad ransomware attacks * Conducting cyber espionage for political interference * Influencing political systems and processes * Disrupting an organization's operations ### How does an APT attack work? APTs start with an initial attack to gain a foothold. Once inside, attackers move laterally to conduct surveillance and increase access. Most APT attackers then erase their tracks and remain hidden to help evade security measures and expand their footprint. In some cases, threat actors stealthily conduct exfiltration over an extended period. In others, the attackers bide their time until conditions are right for them to launch their main attack. Related Content [What Is an Incident Response Plan (IRP)? Why an IRP is important and how to build one.](https://www.paloaltonetworks.com/cyberpedia/incident-response-plan?ts=markdown) [Defense contractor contains APT with Unit 42® Incident Response expertise Discover how Unit 42 identified the threat actor, contained the attack, evicted the threat actor, and strengthened the client's defenses.](https://www.paloaltonetworks.com/customers/defense-contractor-contains-apt-with-unit-42-incident-response-expertise?ts=markdown) [2025 Global Incident Response Report Expert insights and recommendations from leaders in incident response](https://www.paloaltonetworks.com/resources/research/unit-42-incident-response-report?ts=markdown) [IDC 2025 MarketScape Leader for Worldwide IR Services. See why IDC MarketScape recognized us.](http://start.paloaltonetworks.com/idc-incident-response-marketscape-2025) ![Share page on facebook](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/resources/facebook-circular-icon.svg) ![Share page on linkedin](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/resources/linkedin-circular-icon.svg) [![Share page by an email](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/resources/email-circular-icon.svg)](mailto:?subject=What%20Is%20an%20Advanced%20Persistent%20Threat%3F&body=Discover%20the%20intricacies%20and%20how%20to%20counter%20an%20advanced%20persistent%20threat%20%28APT%29%2C%20a%20prolonged%2C%20formidable%20cyberattack%20strategy%20targeting%20high-value%20assets.%20at%20https%3A//www.paloaltonetworks.com/cyberpedia/what-is-advanced-persistent-threat-apt) Back to Top [Previous](https://www.paloaltonetworks.com/cyberpedia/command-and-control-explained?ts=markdown) What is a Command and Control Attack? 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