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

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 PowerShell Start-BitsTransfer downloading a DLL into ProgramData, the ingress technique used against East Asian semiconductor firms to stage the ChargeWeapon loader module. BITS transfers of DLLs into ProgramData blend malicious downloads with a trusted service. This combination is a strong staging indicator.

Reporting behind it

Related detections9 linkedT1105 — drag to rearrange

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Suspicious File Download via Certutil URLCache

Windows Process Creation: bitsadmin Downloads Files to Suspicious Directories

Windows Process Creation: BITSAdmin Downloading File with Suspicious Extension

Windows BITSAdmin Downloads from File-Sharing Domains

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

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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