macOS ClickFix loader chains eval of decoded shell payload stages

Emiliano Mema@Nosalva

•updated Aug 26, 2026•1•0•2

Detects suspicious execution patterns in Unix-based shells (sh, bash, zsh) where commands are obfuscated using base64, openssl, or gunzip and then executed via 'eval'. The command further includes indicators of manual execution or persistence, such as 'printf', 'xattr', or immediate permission changes ('chmod +x'). This pattern is frequently observed in the delivery of multi-stage payloads, fileless malware, or initial entry stagers.