Malicious Native IIS Module Loaded by w3wp Worker Process

ATT&CK techniques

Persistence

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1505.004IIS Components
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects the IIS worker process w3wp.exe loading ManagedEngine64_v2.dll, a malicious native IIS module deployed by the GhostRedirector group as a server-side backdoor. Rogue IIS modules run inside the trusted web server process and give attackers persistent request handling and code execution on internet-facing servers.

Reporting behind it

Related detections9 linkedT1505.004 — drag to rearrange

Malicious BADIIS Native IIS Module Loaded by Worker Process (via image_load)

Malicious BadIIS C2 Communication via lwxatisme User-Agent

Suspicious BadIIS Native Module Registration via cmd Copy

Malicious Native IIS Module Installation via Appcmd by UAT-8099

Malicious BadIIS Module Load into IIS Worker Process by UAT-8099

Suspicious Malicious IIS Module DLL Written to Inetsrv Directory (via file_event)

Malicious Webserver IIS Configuration Edited - SYSMON (via file_event)

Malicious Webserver IIS Module Installed - Command (via process_creation)

Malicious Webserver IIS Module Installed - Command (via process_creation) - Variant 2

Malicious Native IIS Module Loaded by w3wp Worker Process

Pivot detection · T1505.004 · 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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