Cobalt Strike Team Server Population Study
From February 4, 2019 to February 15, 2019 Strategic Cyber LLC connected to several live Cobalt Strike team servers to download Beacon payloads, analyze them,
Cobalt Strike 3.13 – Why do we argue?
Cobalt Strike 3.13 is now available. This release adds a TCP Beacon, process argument spoofing, and extends the Obfuscate and Sleep capability to the SMB
Cobalt Strike 3.12 – Blink and you’ll miss it
Cobalt Strike 3.12 is now available. This release adds an “obfuscate and sleep” in-memory evasion feature, gives operators [some] control over process injection, and introduces
Broken Promises and Malleable C2 Profiles
Red Team infrastructure is a detail-heavy subject. Take the case of domain fronting through a CDN like CloudFront. You have to setup the CloudFront distribution, have a valid
PowerShell Shellcode Injection on Win 10 (v1803)
Cobalt Strike’s process to inject shellcode, via PowerShell, does not work with the latest Windows 10 update (v1803). While it’s possible to work without this
Fighting the Toolset
What happens when your advantages become a disadvantage? That’s the theme of Fighting the Toolset. This lecture discusses Offensive PowerShell, staging, memory-injected DLLs, and remote
Beware of Slow Downloads
I often receive emails that ask about slow file downloads with the Beacon payload. Here are the symptoms: When I get these emails, I usually
In-Memory Evasion
Many analysts and automated solutions take advantage of various memory detections to find injected DLLs in memory. Memory detections look at the properties (and content)
Modern Defenses and YOU!
Part 9 of Advanced Threat Tactics covers a lot of my thoughts on evasion. The ideas in that lecture are still relevant, the defenses discussed
OPSEC Considerations for Beacon Commands
Update January 9, 2020 – This topic is now part of the Cobalt Strike documentation. Head over to the Beacon Command Behavior page for the