Malicious curl Exfiltration to Attacker Upload Endpoint on macOS (via process_creation)

ATT&CK techniques

Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1041Exfiltration Over C2 Channel
Impact

What it detects

This rule detects curl multipart form uploads to the /tasks/upload_file endpoint used by a North Korea-linked actor to exfiltrate stolen files from macOS crypto-sector targets. The RustDoor and Koi Stealer chain uploads harvested credentials and wallet data to attacker-controlled servers such as visualstudiomacupdate over this path.

Reporting behind it

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Malicious curl Exfiltration to Attacker Upload Endpoint on macOS (via process_creation)

Pivot detection · T1041 · 9 related

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