.. /Createdump.exe

Star

Paths:

• C:\Program Files\dotnet\shared\Microsoft.NETCore.App\<version>\createdump.exe
• C:\Program Files (x86)\dotnet\shared\Microsoft.NETCore.App\<version>\createdump.exe
• C:\Program Files\Microsoft Visual Studio\<version>\Community\dotnet\runtime\shared\Microsoft.NETCore.App\6.0.0\createdump.exe
• C:\Program Files (x86)\Microsoft Visual Studio\<version>\Community\dotnet\runtime\shared\Microsoft.NETCore.App\6.0.0\createdump.exe

Resources:

• https://twitter.com/bopin2020/status/1366400799199272960
• https://docs.microsoft.com/en-us/troubleshoot/developer/webapps/aspnetcore/practice-troubleshoot-linux/lab-1-3-capture-core-crash-dumps

Acknowledgements:

• bopin (@bopin2020)

Detections:

• Sigma: https://github.com/SigmaHQ/sigma/blob/19396788dbedc57249a46efed2bb1927abc376d4/rules/windows/process_creation/proc_creation_win_proc_dump_createdump.yml
• Sigma: https://github.com/SigmaHQ/sigma/blob/683b63f8184b93c9564c4310d10c571cbe367e1e/rules/windows/process_creation/proc_creation_win_renamed_createdump.yml
• IOC: createdump.exe process with a command line containing the lsass.exe process id

Dump

1. Dump process by PID and create a minidump file. If "-f dump.dmp" is not specified, the file is created as '%TEMP%\dump.%p.dmp' where %p is the PID of the target process.

   createdump.exe -n -f dump.dmp [PID]

   Use case

   Dump process memory contents using PID.

   Privileges required

   SYSTEM

   Operating systems

   Windows 10, Windows 11

   ATT&CK® technique

   T1003