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API unhooking via Perun's Fart

Tactic: Defense-evasion
Professional
This is a professional level chain. This TTP requires an professional license to use.info
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This TTP will create a new process in a suspended state, create a clean version of `ntdll.dll`, and overwrite the `ntdll.dll` from the current process to unhook it. After `ntdll.dll` is unhooked, the shellcode is executed to spawn calc.exe.
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Authors

heavenraiza

Tactic

Defense-evasion

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API unhooking via Perun's Fart

2022-10-04

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API unhooking by overwriting the current process version of the DLL.
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