NPM Supply Chain - Postinstall Shell Profile Persistence
Detects a node/npm/npx process writing to a Unix shell startup file (.zshrc, .zprofile, .bashrc, .bash_profile) immediately after package install activity. STARDUST CHOLLIMA (DPRK-nexus) used stolen maintainer credentials to compromise the Axios npm package and deliver platform-specific "ZshBucket" malware, and separately injected a malicious dependency into 131 Mastra AI framework packages. Malicious postinstall scripts modifying shell profiles is a persistence mechanism consistent with this campaign's naming and delivery pattern.
YARA-L
