Suspicious COLDRIVER Logon Script Persistence via UserInitMprLogonScript (via process_creation)
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-05-04
- Updated
- 2026-08-28
ATT&CK techniques
Persistence → Priv EscRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects a reg add command creating the UserInitMprLogonScript value under HKCU Environment to run a hidden PowerShell stager at logon as performed by the COLDRIVER SIMPLEFIX chain. This logon script value is a well known but rarely legitimate persistence location.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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