Suspicious Fscan Internal Network Scanner Execution (via process_creation)

ATT&CK techniques

Discovery

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
- T1046Network Service Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects execution of the fscan network scanner with host file and silent output options as observed in the MeshAgent and SuperShell intrusion. Fscan is used by the actor to enumerate internal hosts and open ports for lateral movement.

Reporting behind it

Related detections9 linkedT1046 — drag to rearrange

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Suspicious Fscan Internal Network Scanner Execution (via process_creation)

Pivot detection · T1046 · 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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