How can attackers bypass signature verification without leaving a custom DLL on the system?

Attackers can reuse an existing system DLL that exports a function returning `TRUE`. For example, `ntdll.dll` exports `DbgUiContinue`, which always returns `TRUE`. By setting the registry key's `Dll` value to `C:\Windows\System32\ntdll.dll` and `FuncName` to `DbgUiContinue`, the verification process is hijacked without deploying any new files. This technique is highlighted in the article and reduces forensic artifacts.