Malicious Latrodectus DLL Execution via rundll32 from AppData Roaming (via process_creation)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects rundll32 executing the vierm_soft_x64 DLL from AppData Roaming, the Latrodectus payload LUNAR SPIDER disguised as a legitimate NVIDIA file. The malicious DLL is dropped by an MSI installer and launched from a user profile directory. This combination indicates loader execution ahead of Brute Ratel deployment.

Reporting behind it

Related detections9 linkedT1218.011 — drag to rearrange

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Malicious Lunar Spider Loader Execution via rundll32 (via process_creation)

Malicious SYSTEM Persistence via Scheduled Task Running rundll32 at Startup (via process_creation)

Malicious Rundll32 Executing Image File as DLL

Suspicious Scheduled Task Executing Rundll32 DLL Export by Ordinal

Malicious Renamed Rundll32 Copied to Temp via Xcopy

Suspicious rundll32 Executing DLL from ProgramData (via process_creation)

Malicious Latrodectus DLL Execution via rundll32 from AppData Roaming (via process_creation)

Pivot detection · T1218.011 · 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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