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
Joe’s Transition
My career is taking me in a new and exciting direction, and I am stepping down from my role on the Cobalt Strike team. I’ve
Cobalt Strike Training Options
The Cobalt Strike training web page has been updated. https://www.cobaltstrike.com/training/ The training web page lists free courses created by the Cobalt Strike team that provide
User Defined Reflective Loader (UDRL) Update in Cobalt Strike 4.5
The User Defined Reflective Loader (UDRL) was first introduced in Cobalt Strike 4.4. to allow the creation and use of a custom reflective loader. This
Sleep Mask Update in Cobalt Strike 4.5
The Sleep Mask Kit was first introduced in Cobalt Strike 4.4 to allow users to modify how the sleep mask function looks in memory in order to defeat static signatures that identified Beacon. This
A Deeper Look Into the Max Retry Strategy Option
A complementary strategy to the Host Rotation Strategy was introduced to Cobalt Strike 4.5. The max retry strategy was added to HTTP, HTTPS, and DNS
Create a proxy DLL with artifact kit
DLL attacks (hijacking, proxying, etc) are a challenge defenders must face. They can be leveraged in a Red Team engagement to help measure these defenses.
Cobalt Strike Sleep Python Bridge
This project started after seeing how the user community tweaks and tunes Cobalt Strike. I was inspired by @BinaryFaultline and @Mcgigglez16 in their project https://github.com/emcghee/PayloadAutomation