Suspicious Rundll32 Execution of DLL Masquerading as Text File via Blind Eagle (via process_creation)

ATT&CK techniques

Defense Evasion

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
- T1036.008Masquerade File Type
- T1218.011Rundll32
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects rundll32 loading a file with a txt extension, a masquerading technique used by Blind Eagle which renames its DLL payload to a text file before execution.

Reporting behind it

Related detections9 linkedT1218.011 — drag to rearrange

Renamed Regsvr32 or Rundll32 Loading a DLL With a Non-Standard Extension (via process_creation)

Suspicious Rundll32 Spawning Injection Target Process via Qakbot (via process_creation)

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)

Suspicious Rundll32 Loading DLL From Public or ProgramData Path via Process Creation (via process_creation)

Suspicious Rundll32 Execution of DLL Masquerading as Text File via Blind Eagle (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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