Suspicious MOVEit w3wp Child Process Execution via process_creation

ATT&CK techniques

Initial Access → Persistence

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
Persistence
- T1505.003Web Shell
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the MOVEit Transfer IIS worker process w3wp.exe spawning command interpreters, which is the expected behavior when a dropped ASPX web shell is executed. During CVE-2023-34362 exploitation the attacker used the web shell under w3wp to run follow-on commands, so interpreter children of this worker are a strong web exploitation signal.

Reporting behind it

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Suspicious MOVEit w3wp Child Process Execution via process_creation

Pivot detection · T1190 · 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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