Gamaredon Ptero-Family PowerShell Downloader Execution

Ibrahim Saud@tektrix

•updated Jun 27, 2026•2•0•15

Detects malicious PowerShell command-line execution associated with the Gamaredon (Shuckworm/ACTINIUM) threat group's Ptero-family of tools. This rule flags PowerShell processes utilizing encoded commands (-enc, -EncodedCommand), hidden windows (-nop, -w hidden), and downloader cmdlets (DownloadString, DownloadFile, IEX) that include specific strings linked to the Ptero malware suite (e.g., PteroPaste, PteroVDoor, PteroPSDoor).