Suspicious File Download via bitsadmin Transfer by Medusa Ransomware

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1197BITS Jobs
Persistence
- T1197BITS Jobs
Priv Esc
Defense Evasion
- T1197BITS Jobs
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects use of bitsadmin with the transfer argument to download files through the Background Intelligent Transfer Service, matching tooling ingress used by Medusa ransomware operators per Unit 42. Adversaries abuse the trusted bitsadmin utility to fetch payloads while evading application controls which supports staging of ransomware components.

Reporting behind it

Related detections9 linkedT1105 — drag to rearrange

Suspicious bitsadmin Download of Python Payload via COLDRIVER

Suspicious SCMBanker Toolkit Staging via Bitsadmin to Public Directory

Suspicious DLL Download to ProgramData via Start-BitsTransfer (via process_creation)

Suspicious Remote Script Transfer via Bitsadmin (via process_creation)

Suspicious File Download Via Bitsadmin Transfer

BITS Payload Downloaded via Commandline (via process_creation)

BITS Payload Downloaded via PowerShell (via powershell)

Suspicious sLoad Payload Download via BITSAdmin LOLBin Transfer (via process_creation)

Suspicious File Download via Certutil URLCache

Suspicious File Download via bitsadmin Transfer by Medusa Ransomware

Pivot detection · T1105 · 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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