Emerging Threathightest
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.
Convert In Phoenix Studio
Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.
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
WindowsFile Event
ProductWindows← raw: windows
CategoryFile Event← raw: file_event
Events for file system activity including creation, modification, and deletion.
Detection Logic
Detection Logic1 selector
detection:
selection:
TargetFilename: 'C:\users\public\Documents\dllhost.exe'
condition: selectionFalse Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Other
detection.emerging-threats
Rule Metadata
Rule ID
c708a93f-46b4-4674-a5b8-54aa6219c5fa
Status
test
Level
high
Type
Emerging Threat
Created
Sun Apr 30
Path
rules-emerging-threats/2023/Malware/COLDSTEEL/file_event_win_malware_coldsteel_renamed_cmd.yml
Raw Tags
attack.persistenceattack.defense-evasiondetection.emerging-threats