Cobalt Strike 4.10: Through the BeaconGate
Cobalt Strike 4.10 is now available. This release introduces BeaconGate, the Postex Kit, and Sleepmask-VS. In addition, we have overhauled the Sleepmask API, refreshed the
Introducing the Mutator Kit: Creating Object File Monstrosities with Sleep Mask and LLVM
This is a joint blog written by William Burgess (@joehowwolf) and Henri Nurmi (@HenriNurmi). In our ‘Cobalt Strike and YARA: Can I Have Your Signature?’
Cobalt Strike and Outflank Security Tooling: Friends in Evasive Places
This is a joint blog written by the Cobalt Strike and Outflank teams. It is also available on the Outflank site. Over the past few months
Cobalt Strike and YARA: Can I Have Your Signature?
Over the past few years, there has been a massive proliferation of YARA signatures for Beacon. We know from conversations with our customers that this
Stopping Cybercriminals From Abusing Security Tools
Microsoft’s Digital Crimes Unit (DCU), cybersecurity software company Fortra™ and Health Information Sharing and Analysis Center (Health-ISAC) are taking technical and legal action to disrupt
Behind the Mask: Spoofing Call Stacks Dynamically with Timers
This blog introduces a PoC technique for spoofing call stacks using timers. Prior to our implant sleeping, we can queue up timers to overwrite its
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
Writing Beacon Object Files: Flexible, Stealthy, and Compatible
Our colleagues over at Core Security have been doing great things with Cobalt Strike, making use of it in their own engagements. They wrote up
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