GCVE-110-OSM-2026-9590

This package is a trojanized WhatsApp API library published by a confirmed malicious actor (publisherMaliciousRatio 0.5, with @alannxd/baileys already flagged as high-severity malicious). The critical finding is that deobfuscation of lib/Utils/generics.js recovered hidden IOCs, not legitimate WhatsApp infrastructure. The preinstall hook runs engine-requirements.js (benign on its surface as a Node.js version check) suggesting supply-chain poisoning at the dependency layer. The attacker model is credential/session theft from WhatsApp users: the library intercepts creds (noiseKey, signedIdentityKey), encodes them to base64, and exfiltrates them to attacker-controlled domains. The combination of obfuscated IOC recovery, malicious publisher history, malicious dependencies, and exfil-classified domains constitutes a clear malicious verdict. ENTRY engine-requirements.js (install-hook: node ./engine-requirements.js) - Install Hook Executes Local JS File in package.json PERSISTENCE - Startup Persistence in lib/Store/make-in-memory-store.js: ".profile" DESTINATION - 2 exfil (custom-c2) (values recorded in verified_iocs) EXFIL - Data Encoding for Exfiltration in lib/Socket/socket.js: "Buffer.from(creds.noiseKey.public).toString('base64')" - Data Encoding for Exfiltration in lib/Utils/chat-utils.js: "Buffer.from(indexMac).toString('base64')" - Data Encoding for Exfiltration in lib/Utils/messages-media.js: "Buffer.from(media.fileSha256).toString('base64')" - Data Encoding for Exfiltration in lib/Utils/process-message.js: "Buffer.from(keyId.keyId).toString('base64')" - Network Request in lib/Utils/messages-media.js: "axios.get(" OBFUSCATION - IOCs Found in Deobfuscated Code in lib/Utils/generics.js - Dynamic Base64 Decoding in lib/Signal/Group/group_cipher.js: "Buffer.from(iv, 'base64')" - Dynamic Base64 Decoding in lib/Signal/Group/sender-key-state.js: "Buffer.from(chainKey, 'base64')" - Dynamic Base64 Decoding in lib/Utils/chat-utils.js: "Buffer.from(keyId, 'base64')" - Dynamic Base64 Decoding in lib/Utils/generics.js: "Buffer.from(val, 'base64')" - Dynamic Base64 Decoding in lib/Utils/validate-connection.js: "Buffer.from(advSecretKey, 'base64')" - Strings Extracted from Deobfuscated Code in lib/Signal/Group/sender-key-state.js - Strings Extracted from Deobfuscated Code in lib/Utils/chat-utils.js (+3 more) ADDITIONAL FINDINGS - Platform Detection with Data Collection in lib/Socket/messages-recv.js: "JSON.stringify({ ...child, content: Buffer.isBuffer(child.content) ? child.conte..." - Shell Command Execution in lib/Utils/messages-media.js: "require("child_process")" - Publisher Has Other Malicious Packages - Malicious Dependency Detected in package.json PAYLOAD FILES lib/Utils/messages-media.js (+ lib/Utils/generics.js, lib/Utils/chat-utils.js)