Emerging Threatcriticaltest
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
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Launch
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
ParentImage|endswith: '\svchost.exe'
ParentCommandLine|contains:
- ' -k msupdate'
- ' -k msupdate2'
- ' -k alg'
Image|endswith: '\rundll32.exe'
CommandLine|contains:
- 'UpdateDriverForPlugAndPlayDevicesW'
- 'ServiceMain'
- 'DiUninstallDevice'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Other
detection.emerging-threats
Rule Metadata
Rule ID
88516f06-ebe0-47ad-858e-ae9fd060ddea
Status
test
Level
critical
Type
Emerging Threat
Created
Sun Apr 30
Path
rules-emerging-threats/2023/Malware/COLDSTEEL/proc_creation_win_malware_coldsteel_cleanup.yml
Raw Tags
attack.persistenceattack.defense-evasiondetection.emerging-threats