Locked ScreenshotBOF: alternative screenshot capability for Cobalt Strike

[itsMe]

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ScreenshotBOF

An alternative screenshot capability for Cobalt Strike that uses WinAPI and does not perform a fork & run. The screenshot was downloaded in memory.

Why did I make this?

Cobalt Strike uses a technique known as fork & run for many of its post-ex capabilities, including the screenshot command. While this behavior provides stability, it is now well-known and heavily monitored. This BOF is meant to provide a more OPSEC-safe version of the screenshot capability.

Self Compilation

    git clone the repo: git clone
    open the solution in Visual Studio
    Build project BOF

Save methods:

    drop file to disk
    download file over beacon (Cobalt Strike only)

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