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
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
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
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 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
Dynamically Instrumenting Beacon With BeaconGate – For All Your Call Stack Spoofing Needs!
TL;DR: In this blog we’ll demonstrate how to instrument Beacon via BeaconGate and walk through our implementations of return address spoofing, indirect syscalls, and a
Cobalt Strike 4.12: Fix Up, Look Sharp!
Cobalt Strike 4.12 is now available. We are excited to introduce a new look and feel for the Cobalt Strike GUI, a REST API, User
Playing in the (Tradecraft) Garden of Beacon: Finding Eden
We have previously blogged about using BeaconGate to dynamically instrument Beacon at run time. However, one of BeaconGate’s limitations is that it is not applied throughout Beacon’s entire lifecycle. Specifically, it does