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[Cyberpedia](https://www.paloaltonetworks.com/cyberpedia?ts=markdown) 2. [Threats](https://www.paloaltonetworks.com/cyberpedia/threat?ts=markdown) 3. [Cyberthreat Intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti?ts=markdown) 4. [What Are Unknown Cyberthreats?](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats?ts=markdown) Table of contents * [What Is Cyber Threat Intelligence (CTI)?](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti?ts=markdown) * [What Data Is Considered Threat Intelligence?](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#considered?ts=markdown) * [Sources of Threat Intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#sources?ts=markdown) * [Tools and Services in Threat Intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#tools?ts=markdown) * [Practical Implementation of Threat Intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#implementation?ts=markdown) * [The Threat Intelligence Lifecycle: An Overview](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#lifecycle?ts=markdown) * [Building an Effective Threat Intelligence Program](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#program?ts=markdown) * [Threat Intelligence FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti#faq?ts=markdown) * [Threat Intelligence Use Cases and Examples](https://www.paloaltonetworks.com/cyberpedia/threat-intelligence-use-cases-and-examples?ts=markdown) * [What Are the 4 Types of Threat Intelligence?](https://www.paloaltonetworks.com/cyberpedia/threat-intelligence-use-cases-and-examples#types?ts=markdown) * [Top 4 Use Cases for a Threat Intel Platform (TIP)](https://www.paloaltonetworks.com/cyberpedia/threat-intelligence-use-cases-and-examples#use-cases?ts=markdown) * [Specific Examples of Threat Intelligence Use Cases](https://www.paloaltonetworks.com/cyberpedia/threat-intelligence-use-cases-and-examples#examples?ts=markdown) * [MITRE ATT\&CK as a Threat Intelligence Use Case](https://www.paloaltonetworks.com/cyberpedia/threat-intelligence-use-cases-and-examples#mitre?ts=markdown) * [Threat Intelligence Use Cases FAQs](https://www.paloaltonetworks.com/cyberpedia/threat-intelligence-use-cases-and-examples#faq?ts=markdown) * [What is the Threat Intelligence Lifecycle?](https://www.paloaltonetworks.com/cyberpedia/what-is-the-threat-intelligence-life-cycle?ts=markdown) * [Why is the Threat Intelligence Lifecycle Important?](https://www.paloaltonetworks.com/cyberpedia/what-is-the-threat-intelligence-life-cycle#why?ts=markdown) * [The 6 Stages of the Threat Intelligence Lifecycle](https://www.paloaltonetworks.com/cyberpedia/what-is-the-threat-intelligence-life-cycle#lifecycle?ts=markdown) * [Benefits of the Threat Intelligence Lifecycle Framework](https://www.paloaltonetworks.com/cyberpedia/what-is-the-threat-intelligence-life-cycle#benefits?ts=markdown) * [Threat Intelligence Lifecycle FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-the-threat-intelligence-life-cycle#faqs?ts=markdown) * [What is a Threat Intelligence Platform (TIP)?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform?ts=markdown) * [The Value of a Threat Intelligence Platform](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#value?ts=markdown) * [How Threat Intelligence Works](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#intelligence?ts=markdown) * [Types and Examples of Threat Intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#examples?ts=markdown) * [Why Do Organizations Need a Threat Intelligence Platform (TIP)?](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#organizations?ts=markdown) * [Key Characteristics of a Threat Intelligence Platform](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#characteristics?ts=markdown) * [Types of Threat Intelligence Data](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#threat?ts=markdown) * [Implementation of a Threat Intelligence Platform](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#platform?ts=markdown) * [Threat Intelligence Platforms FAQs](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform#faqs?ts=markdown) * What Are Unknown Cyberthreats? * [How Unknown Cyberthreats Are Redefining Cloud Security](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#how?ts=markdown) * [Why Unknown Threats Matter](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#why?ts=markdown) * [Types of Unknown Cyberthreats](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#types?ts=markdown) * [Advanced Defense Strategies for Modern Threats](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#advanced?ts=markdown) * [Resilient Cloud Security Starts with Visibility and Adaptation](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#resilient?ts=markdown) * [Unknown Cyberthreats FAQs](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#faqs?ts=markdown) * [What Are Cyberthreat Intelligence Tools?](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools?ts=markdown) * [Types of Threat Intelligence Tools](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#types?ts=markdown) * [How Threat Intelligence Tools Work](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#tools?ts=markdown) * [Key Functions of Threat Intelligence Tools](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#key?ts=markdown) * [What is a Threat Intelligence Platform (TIP)?](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#platform?ts=markdown) * [Best Practices for Implementing Threat Intelligence Tools](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#practices?ts=markdown) * [Emerging Trends in Threat Intelligence](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#trends?ts=markdown) * [Threat Intelligence Tools FAQs](https://www.paloaltonetworks.com/cyberpedia/cyber-threat-intelligence-tools#faqs?ts=markdown) * [What are the Types of Cyberthreat Intelligence (CTI)?](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence?ts=markdown) * [What is Cyberthreat Intelligence?](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#cyberthreat?ts=markdown) * [What is Strategic Threat Intelligence?](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#strategic?ts=markdown) * [What is Tactical Threat Intelligence?](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#tactical?ts=markdown) * [What is Operational Threat Intelligence?](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#operational?ts=markdown) * [Application of Cyberthreat Intelligence](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#application?ts=markdown) * [Challenges in Cyberthreat Intelligence](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#challenges?ts=markdown) * [Cyberthreat Intelligence FAQs](https://www.paloaltonetworks.com/cyberpedia/types-of-cyberthreat-intelligence#faqs?ts=markdown) # What Are Unknown Cyberthreats? 5 min. read Table of contents * * [How Unknown Cyberthreats Are Redefining Cloud Security](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#how?ts=markdown) * [Why Unknown Threats Matter](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#why?ts=markdown) * [Types of Unknown Cyberthreats](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#types?ts=markdown) * [Advanced Defense Strategies for Modern Threats](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#advanced?ts=markdown) * [Resilient Cloud Security Starts with Visibility and Adaptation](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#resilient?ts=markdown) * [Unknown Cyberthreats FAQs](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#faqs?ts=markdown) 1. How Unknown Cyberthreats Are Redefining Cloud Security * * [How Unknown Cyberthreats Are Redefining Cloud Security](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#how?ts=markdown) * [Why Unknown Threats Matter](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#why?ts=markdown) * [Types of Unknown Cyberthreats](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#types?ts=markdown) * [Advanced Defense Strategies for Modern Threats](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#advanced?ts=markdown) * [Resilient Cloud Security Starts with Visibility and Adaptation](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#resilient?ts=markdown) * [Unknown Cyberthreats FAQs](https://www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats#faqs?ts=markdown) Unknown cyberthreats refer to cybersecurity risks or attack methods that have not been previously identified, documented, or encountered. These threats evade traditional security tools---like antivirus software and firewalls---because they don't match any known patterns, signatures, or behaviors. As cloud environments scale and evolve, so do the attack methods targeting them. Let's explore how these threats impact modern cloud security and how organizations can proactively defend against them. ![Inside Threat Hunting at Palo Alto Networks | This is How We Do It Ep 7](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/what-are-unknown-cyberthreats/video-thumbnail-this-is-how-we-do-it-ep-7.jpg) close ## How Unknown Cyberthreats Are Redefining Cloud Security [Cloud security](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cloud-security?ts=markdown) has become a moving target in today's cloud-first, threat-saturated environment. Among the most dangerous risks organizations face are unknown cyberthreats---attacks that have never been seen before and often bypass legacy defenses undetected. These threats include: * Zero-day exploits * AI-driven attack campaigns * Polymorphic malware * [Living-off-the-land techniques](https://www.paloaltonetworks.com/cyberpedia/what-are-fileless-malware-attacks?ts=markdown) that weaponize legitimate system tools Such threats are adaptive, stealthy, and often cause significant damage before detection. Their unpredictability makes them a growing concern for CISOs and security teams, especially in [hybrid](https://www.paloaltonetworks.com/cyberpedia/what-is-hybrid-cloud-security?ts=markdown) and multi-cloud environments where visibility gaps are common. ### Why the Cloud Is an Ideal Target Modern cloud infrastructure is complex and fast-evolving, which creates ideal conditions for unknown threats to thrive: * Expands the [attack surface](https://www.paloaltonetworks.com/cyberpedia/what-is-attack-surface-management?ts=markdown) * Frequent misconfigurations * Creates gaps in visibility across [workloads](https://www.paloaltonetworks.com/cyberpedia/what-is-workload?ts=markdown) and [APIs](https://www.paloaltonetworks.com/cyberpedia/what-is-api-security?ts=markdown) These factors enable attackers to [move laterally](https://www.paloaltonetworks.com/cyberpedia/what-is-lateral-movement?ts=markdown), escalate privileges, or exfiltrate data without triggering traditional alarms. ## Why Unknown Threats Matter Unknown cyberthreats are particularly dangerous because: * They can go undetected for long periods. * They often cause more damage before a response can be made. * They expose the limitations of signature-based security tools. Attackers constantly develop or modify threats to circumvent existing protections. To combat this, security teams must shift from reactive defenses to intelligence-driven, proactive strategies. Let's break down how these threats work---and how to stay ahead of them. ### Recycled Threats These threats use previously known tactics but rely on security tools' limited memory. Recycled attacks may slip through undetected if a product doesn't retain or recognize older threat data. **Defense Tip:** Leverage scalable threat intelligence repositories (often via elastic cloud infrastructure) to retain and reference historical attack data, helping convert unknown threats into known, blockable ones. ### Modified Existing Code Attackers often tweak known [malware](https://www.paloaltonetworks.com/cyberpedia/what-is-malware?ts=markdown) in real time to evade detection---creating **polymorphic variants** that bypass static, hash-based detection methods. **Defense Tip**: Use behavior-based detection and polymorphic signature engines to identify malicious patterns regardless of code mutations. ### Newly Created Threats Sophisticated attackers sometimes develop entirely new malware with never-before-seen code and methods, making them truly unknown at the time of attack. #### Focus on Business Behavior Understanding your organization's expected data flows and [user behavior](https://www.paloaltonetworks.com/cyberpedia/what-is-user-entity-behavior-analytics-ueba?ts=markdown) helps identify anomalies quickly. Use segmentation based on user and application IDs to isolate suspicious activity. #### Utilize Collective Intelligence No single organization will see every threat. Participate in global threat intelligence sharing to benefit from early detections and shared defenses. #### Automate Protections The faster your systems can analyze unknown files and push protections across the environment, the better. Use sandboxing, automated threat verdicts, and instant protection deployment to neutralize threats before they spread. ![A 2D digital diagram centered on the question "What are Unknown Cyberthreats?" with five surrounding labeled sections: Zero-Day Exploits, New Malware Variants, Polymorphic Attacks, AI-Powered Threats, and Living-off-the-Land (LotL) Attacks.](https://www.paloaltonetworks.com/content/dam/pan/en_US/images/cyberpedia/what-are-unknown-cyberthreats/what-are-unknown-cyberthreats.jpg "What Are Unknown Cyberthreats?") ## Types of Unknown Cyberthreats Here are the most common categories of unknown threats facing cloud environments today: * **Zero-Day Exploits**: Previously undisclosed software vulnerabilities exploited before a patch exists. * **New Malware Variants**: Modified ransomware, trojans, or worms that tweak code to bypass detection. * **Polymorphic Attacks**: Shape-shifting malware that alters its structure or behavior on the fly. * **AI-Powered or Autonomous Threats**: Attacks that use AI to adapt and select targets dynamically. * **[Living-off-the-Land](https://www.paloaltonetworks.com/cyberpedia/what-are-fileless-malware-attacks?ts=markdown) (LotL) Attacks**: Threats that use legitimate tools to avoid detection and blend in with regular activity. ## Advanced Defense Strategies for Modern Threats To mitigate the risk of unknown cyberthreats, security leaders are adopting [cloud-native cybersecurity platforms](https://www.paloaltonetworks.com/cyberpedia/what-is-a-cloud-native-security-platform?ts=markdown) built for speed, scale and adaptability. Key strategies include: * [Cloud Threat Detection](https://www.paloaltonetworks.com/cyberpedia/cloud-security-threats-detection-and-challenges?ts=markdown) with AI/ML: Use behavioral analytics to baseline normal operations and spot anomalies. * [Zero Trust Architecture](https://www.paloaltonetworks.com/cyberpedia/what-is-a-zero-trust-architecture?ts=markdown): Assume breach, verify every request, and limit access based on identity and context. * [Extended Detection and Response (XDR)](https://www.paloaltonetworks.com/cyberpedia/what-is-extended-detection-response-XDR?ts=markdown): Consolidate visibility across cloud services, [endpoints](https://www.paloaltonetworks.com/cyberpedia/what-is-an-endpoint?ts=markdown), and [SaaS](https://www.paloaltonetworks.com/cyberpedia/what-is-saas?ts=markdown) to correlate threats and automate response. * Proactive [Threat Hunting](https://www.paloaltonetworks.com/cyberpedia/threat-hunting?ts=markdown) and Automation: Combine [cyberthreat intelligence](https://www.paloaltonetworks.com/cyberpedia/what-is-cyberthreat-intelligence-cti?ts=markdown), with automated investigation and response to identify and contain threats before damage occurs. ## Resilient Cloud Security Starts with Visibility and Adaptation The ability to detect and neutralize unknown cyberthreats is no longer a "nice-to-have." It's a foundational requirement for any modern cloud security program. CISOs must invest in adaptive, intelligence-driven solutions that: * Monitor continuously. * Detect rapidly. * Respond automatically. * Share threat data globally. Because in the cloud, what you don't see can absolutely hurt you---but with the right strategy, what was once unknown can quickly become preventable. ## Unknown Cyberthreats FAQs ### ​​How do unknown threats bypass traditional security systems? Unknown threats often use zero-day exploits, polymorphic code, or living-off-the-land (LotL) tactics that evade signature-based detection and mimic legitimate behavior. ### What are examples of unknown cyberthreats? Examples include zero-day vulnerabilities, AI-driven malware, new ransomware variants, polymorphic viruses, and attacks using legitimate tools like PowerShell or WMI. ### How can organizations detect unknown threats? Organizations can detect unknown threats by implementing advanced tools like behavioral analytics, AI/ML-based threat detection, extended detection and response (XDR), and proactive threat hunting. ### What's the difference between known and unknown threats? Known threats are previously identified and documented, allowing security tools to recognize and block them. Unknown threats are new or altered attacks that haven't been cataloged, making them harder to detect and stop. ![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%20Are%20Unknown%20Cyberthreats%3F&body=Discover%20how%20unknown%20cyberthreats%20like%20zero-day%20attacks%20and%20AI-driven%20malware%20are%20redefining%20cloud%20security%20and%20how%20to%20protect%20your%20cloud%20environment.%20at%20https%3A//www.paloaltonetworks.com/cyberpedia/what-are-unknown-cyberthreats) Back to Top [Previous](https://www.paloaltonetworks.com/cyberpedia/what-is-a-threat-intelligence-platform?ts=markdown) What is a Threat Intelligence Platform (TIP)? 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