Suspicious Infostealer Log Artifacts Written to Disk (via file_event)

ATT&CK techniques

Collection

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
- T1005Data from Local System
C2
Exfiltration
Impact

What it detects

This rule detects creation of the log artifacts victim_logs.txt and opsec.log written by AI-assisted malware samples analyzed by Unit 42, including a .NET infostealer and a Golang Sliver dropper. These operator log files record collected victim data and dropper activity, so their presence indicates malware staging harvested information locally.

Reporting behind it

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Suspicious Infostealer Log Artifacts Written to Disk (via file_event)

Pivot detection · T1005 · 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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