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
Cobalt Strike 4.5: Fork&Run – you’re “history”
Cobalt Strike 4.5 is now available. This release sees new options for process injection, updates to the sleep mask and UDRL kits, evasion improvements and
Simple DNS Redirectors for Cobalt Strike
This post, from Ernesto Alvarez Capandeguy of Core Security’s CoreLabs Research Team, describes techniques used for creating UDP redirectors for protecting Cobalt Strike team servers.
Beacon Object File ADVENTURES: Some Zerologon, SMBGhost, and Situational Awareness
Cobalt Strike can use PowerShell, .NET, and Reflective DLLs for its post-exploitation features. This is the weaponization problem set. How to take things, developed outside
Cobalt Strike 3.14 – Post-Ex Omakase Shimasu
Cobalt Strike 3.14 is now available. This release benefits the OPSEC of Beacon’s post-exploitation jobs. To take a screenshot, log keystrokes, dump credentials, or scan
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
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
Why is rundll32.exe connecting to the internet?
Previously, I wrote a blog post to answer the question: why is notepad.exe connecting to the internet? This post was written in response to a generation
Talk to your children about Payload Staging
Time to time, I find myself in an email exchange about payload security and payload staging. The payload security discussion revolves around Beacon’s security features.