Revisiting the UDRL Part 3: Beacon User Data
The UDRL and the Sleepmask are key components of Cobalt Strike’s evasion strategy, yet historically they have not worked well together. For example, prior to
Revisiting the User-Defined Reflective Loader Part 2: Obfuscation and Masking
This is the second installment in a series revisiting the User-Defined Reflective Loader (UDRL). In part one, we aimed to simplify the development and debugging
Revisiting the User-Defined Reflective Loader Part 1: Simplifying Development
This blog post accompanies a new addition to the Arsenal Kit – The User-Defined Reflective Loader Visual Studio (UDRL-VS). Over the past few months, we
TeamServer.prop
Following the 4.4 release, you may have noticed a warning message when starting your teamserver: The missing file is optional and its absence does not
Raphael’s Transition
Friday was my last day at HelpSystems. I spent the day on the #Aggressor channel on Slack, put some final touches on a 12 month
verify.cobaltstrike.com outage summary
Cobalt Strike’s update process was degraded due to a data center outage that affected https://verify.cobaltstrike.com. The verify server is back up and the functionality of
Cobalt Strike 4.2 – Everything but the kitchen sink
Cobalt Strike 4.2 is now available. This release overhauls our user exploitation features, adds more memory flexibility options to Beacon, adds more behavior flexibility to
Cobalt Strike 4.1 – The Mark of Injection
Cobalt Strike 4.1 is now available. This release introduces a new way to build post-ex tools that work with Beacon, pushes back on a generic
SSL certificate verification for failed
TL;DR a certificate for part of the Cobalt Strike update infrastructure changed. Download the 20200511 distribution package to avoid certificate verification errors. If you recently
Cobalt Strike joins Core Impact at HelpSystems, LLC (now Fortra)
I founded Strategic Cyber LLC in 2012 to advocate a vision of threat-representative security testing. Over time, Cobalt Strike became the de facto commercial standard for red