GCVE-110-OSM-2026-12373

This package presents as a Baileys WhatsApp library fork and the entrypoint (engine-requirements.js) is genuinely benign — it only checks Node.js version. The Buffer.from base64 operations and string arrays in WABinary/constants.js are consistent with WhatsApp protocol implementation, and the '.profile' matches likely refer to WhatsApp profile operations rather than filesystem persistence. However, the publisher 'xzv-expzc' is a 6-day-old burner account with xzvbailsx already confirmed malicious. While we do not see a malicious payload in this package, we are marking this as suspicious because of its author and connections to threat actors in the Baileys space. ENTRY engine-requirements.js (install-hook: node ./engine-requirements.js) - Install Hook Executes Local JS File in package.json PERSISTENCE - Startup Persistence in lib/Socket/chats.js: ".profile" - Startup Persistence in lib/Socket/messages-send.js: ".profile" DESTINATION - 1 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/generics.js: "Buffer.from(value?.data || value).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/generics.js: "fetch('https:" - Network Request in lib/Utils/messages-media.js: "request({ hostname: parsedUrl.hostname, port: parsedUrl.port || (parsedUrl.proto..." OBFUSCATION - Dynamic Base64 Decoding in lib/Socket/newsletter.js: "Buffer.from(jid, "base64")" - Dynamic Base64 Decoding in lib/Utils/chat-utils.js: "Buffer.from(keyId, 'base64')" - Dynamic Base64 Decoding in lib/Utils/decode-wa-message.js: "Buffer.from(secret, 'base64')" - Dynamic Base64 Decoding in lib/Utils/validate-connection.js: "Buffer.from(advSecretKey, 'base64')" - String Array Obfuscation in lib/Utils/message-composer.js: "[ 'import', 'export', 'from', 'default', 'as', 'const', 'let', 'var', 'function'..." - String Array Obfuscation in lib/Utils/messages.js: "[ 'break', 'case', 'catch', 'continue', 'debugger', 'default', 'delete', 'do', '..." - String Array Obfuscation in lib/WABinary/constants.js: "[ '1724', 'profile_picture', '1071', '1314', '1605', '407', '990', '1710', '746'..." - Decoded Base64 Content in lib/Socket/newsletter.js (x2) (+5 more) ADDITIONAL FINDINGS - Dynamic Code Execution in lib/Utils/message-composer.js: "exec(line)" - Very New NPM Publisher Account - Publisher Has Other Malicious Packages - Publisher Shows Burner-Account Pattern - Malicious Dependency Detected in package.json PAYLOAD FILES lib/Socket/newsletter.js (+ lib/Utils/generics.js, lib/Utils/messages-media.js)