Rule Library

Sigma Rules

Browse detections by severity and log source, with YAML and sample events one click away.

3,782Total
3,164Detection
474Emerging
141Hunting
8 rulesInspect a rule without leaving your results.
hightestEmerging Threat

Potential COLDSTEEL RAT File Indicators

Detects the creation of a file named "dllhost.exe" in the "C:\users\public\Documents\" directory. Seen being used by the COLDSTEEL RAT in some of its variants.

windowsfile_event
2023-04-30
hightestEmerging Threat

Potential COLDSTEEL Persistence Service DLL Load

Detects a suspicious DLL load by an "svchost" process based on location and name that might be related to ColdSteel RAT. This DLL location and name has been seen used by ColdSteel as the service DLL for its persistence mechanism

windowsimage_load
2023-05-02
hightestEmerging Threat

COLDSTEEL RAT Anonymous User Process Execution

Detects the creation of a process executing as user called "ANONYMOUS" seen used by the "MileStone2016" variant of COLDSTEEL

windowsprocess_creation
2023-04-30
criticaltestEmerging Threat

COLDSTEEL RAT Cleanup Command Execution

Detects the creation of a "rundll32" process from the ColdSteel persistence service to initiate the cleanup command by calling one of its own exports. This functionality is not present in "MileStone2017" and some "MileStone2016" samples

windowsprocess_creation
2023-04-30