.. /Regini.exe

Star

Paths:

• C:\Windows\System32\regini.exe
• C:\Windows\SysWOW64\regini.exe

Resources:

• https://gist.github.com/api0cradle/cdd2d0d0ec9abb686f0e89306e277b8f

Acknowledgements:

• Eli Salem (@elisalem9)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/c04bef2fbbe8beff6c7620d5d7ea6872dbe7acba/rules/windows/process_creation/proc_creation_win_regini_ads.yml
• Sigma: https://github.com/SigmaHQ/sigma/blob/c04bef2fbbe8beff6c7620d5d7ea6872dbe7acba/rules/windows/process_creation/proc_creation_win_regini_execution.yml
• IOC: regini.exe reading from ADS

Alternate data streams

1. Write registry keys from data inside the Alternate data stream.

   regini.exe newfile.txt:hidden.ini

   Use case

   Write to registry

   Privileges required

   User

   Operating systems

   Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11

   ATT&CK® technique

   T1564.004