Suspicious PowerShell Interaction with ProgramData SysInt Log via Process Creation

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects PowerShell reading or writing the C ProgramData SysInt.log file that MuddyWater's DarkBeatC2 uses as a staging and command buffer in its multi-stage poll loop. The specific ProgramData filename combined with PowerShell indicates the DarkBeatC2 implant rather than legitimate logging.

Reporting behind it

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Suspicious PowerShell Interaction with ProgramData SysInt Log via Process Creation

Pivot detection · T1071.001 · 9 related

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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