Uncommon File Download via Uncommon LOLBIN (via process_creation)

ATT&CK techniques

C2

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

What it detects

This rule detects file-download abuse of lesser-known living-off-the-land binaries such as certreq -Post, desktopimgdownldr lockscreenurl and finger, which retrieve remote content while blending into signed Windows tooling. Ingress tool transfer via LOLBINs is a technique tracked in the Red Canary Threat Detection Report. Detecting these invocations surfaces payload retrieval that evades naive download monitoring.

Reporting behind it

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Uncommon File Download via Uncommon LOLBIN (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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