GCVE-110-OSM-2026-12797

This package is part of a large family (100+ identified as of September 2026) of near-identical forks of the Baileys WhatsApp Web library that inject a covert channel-subscription action into the WhatsApp socket layer. On connect, the injected code issues an authenticated `w:mex` FOLLOW query (query_id 7871414976211147) against one or more attacker-chosen WhatsApp Channel/Newsletter JIDs, using the installer's own authenticated WhatsApp session -- silently subscribing the victim's account to channels it never asked to join. The target JID(s) are hidden from casual source review via one of several obfuscation techniques observed across the family: a plain string literal, base64 encoding, base64+XOR, or a char-code array reconstructed at runtime. Some variants instead fetch a mutable, attacker-controlled remote JSON/JS list of target JIDs from GitHub or another host at runtime, letting the target list change after installation without a new npm publish. Every sample in the family shares the same underlying mechanism (a wrapped/patched socket-connect routine that fires the FOLLOW query some seconds after connect), even though the package name, JID value(s), and obfuscation/delivery method differ per fork. The malicious action abuses the installer's own authenticated WhatsApp session to gain reach and subscribers for attacker-controlled channels; it does not exfiltrate credentials, establish persistence, or execute arbitrary remote code. Affected package: @queenanya/baileys (npm), version(s): 9.10.1, 9.7.3-beta.1, 9.7.2. ENTRY engine-requirements.js (install-hook: node ./engine-requirements.js) - Install Hook Executes Local JS File in package.json PERSISTENCE - Startup Persistence in assets/wasm/worker-modules.js: ".profile" - Startup Persistence in lib/Socket/chats.js: ".profile" - Startup Persistence in lib/Socket/messages-send.js: ".profile" - Startup Persistence in lib/addons/message-utils.js: ".profile" DESTINATION - 15 exfil (reconstructed, custom-c2) - 2 c2 (domains) - 1 fetched-payload (deobfuscated) (values recorded in verified_iocs) EXFIL - Data Encoding for Exfiltration in assets/wasm/worker-modules.js: "encodeURIComponent(String(e))}).join("&")),n}l.default=s}),98" - 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')" - Data Encoding for Exfiltration in lib/addons/message-composer.js: "encodeURIComponent(latexExpr" - Data Encoding for Exfiltration in lib/addons/rich-response.js: "encodeURIComponent(`\\documentclass{standalone}\\begin{document}\\Large $${expre..." (+4 more) OBFUSCATION - Global Variable Shadowing in lib/Voip/wasm-engine.js: "const module = {" - Global Variable Shadowing in lib/Voip/worker-bootstrap.js: "const module = {" - IOCs Found in Deobfuscated Code in lib/Utils/messages.js - IOCs Found in Deobfuscated Code in lib/Voip/wasm-engine.js - Obfuscation: function to array replacements in assets/wasm/worker-modules.js - Dynamic Base64 Decoding in lib/Utils/chat-utils.js: "Buffer.from(keyId, 'base64')" - Dynamic Base64 Decoding in lib/Utils/messages.js: "Buffer.from(thumbnailSha256, 'base64')" - Dynamic Base64 Decoding in lib/Utils/validate-connection.js: "Buffer.from(advSecretKey, 'base64')" (+12 more) ADDITIONAL FINDINGS - Reconstructed Obfuscated URL in assets/wasm/worker-modules.js: "https://www.internalfb.com/intern/invariant/2/" - Dynamic Code Execution in assets/wasm/loader.js: "exec(t)" - XOR-Encoded String Arrays in assets/wasm/loader.js: "var r=[0,97,115,109,1,0,0,0,1]" - Platform Detection with Data Collection in lib/Framework/MediaManager.js: "JSON.stringify({ 'sticker-pack-id': `com.queenanya.sticker.${randomBytes(4).toS" PAYLOAD FILES assets/wasm/worker-modules.js (+ lib/Voip/wasm-engine.js)