for BMP rendering in aggressorscript, and screenshot callback branch.This BOF is meant to provide a more OPSEC safe version of the screenshot capability. While this behaviour provides stability, it is now well known and heavily monitored for. if downloaded over beacon, BMP can be viewed in Cobalt Strike by right clicking the download and clicking "Render BMP" (credit no evasion is performed, which should be fine since the WinAPIs used are not maliciousĬobalt Strike uses a technique known as fork & run for many of its post-ex capabilities, including the screenshot command.Downloading bitmap over beacon with filename sad.bmp Example use case could be confirming outbound access to specific service before deploying a relay from F-Secure's C3.Running screenshot BOF by host called home, sent: 5267 bytes Simple Web Utility BOF (Curl)īeacon object file and associated aggressor to make simple web requests without establishing SOCKS PROXY. This is effectively a rough port of Dumpert tool. Create process memory dump using MiniDumpWriteDump function to specified (or default) location.Static Syscalls Process Dump BOF (64-bit only) Syscalls generated using SysWhispers2, SysWhispers2BOF and InlineWhispers. Same injection process as above, but using static Syscalls, rather than stubs fetched from Ntdll. Syscalls generated using SysWhispers2, SysWhispers2BOF and InlineWhispers.Ĭode adapted from injectopi Static Syscalls Shellcode Injection BOF (64-bit only) Uses BeaconSpawnTemporaryProcess to create the target process. NtCreateSection -> NtMapViewOfSection -> NtQueueApcThread -> NtResumeThead. Spawn with Syscalls Shellcode Injection (NtMapViewOfSection -> NtQueueApcThread) BOF (64-bit only) Same syscalls injection process as SyscallsInject (above) but uses BeaconSpawnTemporaryProcess to create the target process. Inject shellcode (either custom or beacon) into remote process using NtOpenProcess -> NtAllocateVirtualMemory -> NtWriteVirtualMemory -> NtCreateThreadEx.Ĭredit also to for their DLL inject BOF and aggressor script ( ) Spawn with Syscalls Shellcode Injection BOF (64-bit only).Fetch Syscall Stubs from on-disk ntdll.dll (All credit to - ).API unhooking)Ĭredit goes to for the Dll parsing technique: Syscalls Shellcode Injection BOF (64-bit only) Patch functions with the on-disk copy (i.e.
Read relevant on-disk DLL and compare functions to identify differencies (e.g.
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