.. / Rasautou.exe
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Execute

Windows Remote Access Dialer

Paths:

C:\Windows\System32\rasautou.exe

Resources:

https://github.com/fireeye/DueDLLigence
https://www.fireeye.com/blog/threat-research/2019/10/staying-hidden-on-the-endpoint-evading-detection-with-shellcode.html

Acknowledgements:

FireEye (@FireEye)

Detection:

Sigma: https://github.com/SigmaHQ/sigma/blob/08ca62cc8860f4660e945805d0dd615ce75258c1/rules/windows/process_creation/win_rasautou_dll_execution.yml
IOC: rasautou.exe command line containing -d and -p

Execute

Loads the target .DLL specified in -d and executes the export specified in -p. Options removed in Windows 10.

rasautou -d powershell.dll -p powershell -a a -e e

Usecase: Execute DLL code
Privileges required: User, Administrator in Windows 8
OS: Windows vista, Windows 7, Windows 8, Windows 8.1
MITRE ATT&CK®: T1218

.. / Rasautou.exe Star

Execute

.. / Rasautou.exe
Star