Suspicious curl Silent Download Payload (Amos Stealer)

Ethan Andrews@eandrews

•updated Jun 17, 2026•1•0•6

Detects the use of curl with specific command-line flags (-kfsSL) commonly used by Amos Stealer to silently download its initial payload, bypassing TLS warnings and hiding output. This behavior is indicative of an adversary attempting to transfer tools or malware onto a system without user interaction or visible output.