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Josh Grunzweig

Blogs by Josh Grunzweig

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Unit 42

The Fractured Block Campaign: CARROTBAT Used to Deliver Malware Targeting S...

Unit 42 uncovers a campaign leveraging a previously unreported customized dropper used to deliver lures primarily pertaining to the South Korean and North Korea region.

Nov 29, 2018

By Josh Grunzweig and Kyle Wilhoit

Unit 42

NOKKI Almost Ties the Knot with DOGCALL: Reaper Group Uses New Malware to D...

Reaper Group uses custom malware family called DOGCALL to deploy RAT. Get the full report.

Oct 01, 2018

By Josh Grunzweig

Unit 42

New KONNI Malware attacking Eurasia and Southeast Asia

Unit 42 uncovers NOKKI, a type of malware with ties to the previously discovered KONNI malware family, used to attack Eurasia and Southeast Asia.

Sep 27, 2018

By Josh Grunzweig and Bryan Lee

Unit 42

The Gorgon Group: Slithering Between Nation State and Cybercrime

Slithering between nation state and cybercrime: Unit 42 examines the Gorgon Group’s unsophisticated yet effective attacks. Read the full report.

Aug 02, 2018

By Robert Falcone, David Fuertes, Josh Grunzweig and Kyle Wilhoit

Unit 42

RANCOR: Targeted Attacks in South East Asia Using PLAINTEE and DDKONG Malwa...

Unit 42 investigates the RANCOR group’s use of DDKONG and PLAINTEE malware families to deliver targeted espionage attacks in South East Asia

Jun 26, 2018

By Brittany Ash, Josh Grunzweig and Tom Lancaster

Blogs by Josh Grunzweig

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Welcome back to our blog series where we reveal the solutions to LabyREnth, the Unit 42 Capture the Flag (CTF) challenge. We’ll be revealing the solutions to one challenge track per week. Next up, the Windows track challenges …

Sep 15, 2016

By Richard Wartell, Tyler Halfpop, Josh Grunzweig, Jeff White and Jacob Soo

LabyREnth Capture the Flag (CTF): Mobile Track Solutions

By Richard Wartell, Jacob Soo, Anthony Kasza, Josh Grunzweig and Tyler Halfpop

Events

REcon Recap: Here's What Caught My Eye

A few weeks ago I was fortunate enough to attend REcon in Montreal, Canada. This conference focuses on reverse engineering and exploitation techniques and has been going on for roughly a decade. …

Jul 02, 2015

By Josh Grunzweig