IDAT Loader Connectivity Check via Short racon User-Agent (via proxy)

ATT&CK techniques

C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1071.001Web Protocols
Exfiltration
Impact

What it detects

This rule detects outbound HTTP requests using the minimal racon User-Agent string, the connectivity-check and delivery-chain key used by the UAC-0184 IDAT Loader campaign that delivered Remcos RAT through steganographic images. Adversaries leverage a fixed non-browser User-Agent to gate their delivery chain and verify victim connectivity, making early detection critical for exposing the loader before the RAT payload is decrypted and injected.

Reporting behind it

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IDAT Loader Connectivity Check via Short racon User-Agent (via proxy)

Pivot detection · T1071.001 · 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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