MAL-2026-3765

Dashboard / Malicious Package / MAL-2026-3765

MAL-2026-3765

Summary: Malicious code in joi-pack (npm)

Details: Source: amazon-inspector (5ca38e3574ffcb0fabb105616e28108137c8256e2c70aeede59623bca5df496a) The package declares a postinstall hook (`"postinstall": "node postinstall.js"` in package.json) that runs unconditionally on `npm install`. The script's own header calls itself a "Token harvester + Crypto wallet scanner / Runs on npm install. Silent. Zero trace." It performs two distinct credential-theft behaviors: 1) Installer secret harvest: reads `~/.npmrc`, `~/.env`, and `~/.git-credentials`; extracts npm auth tokens (regex `npm_[a-zA-Z0-9]{36}`), API keys, database URLs, cloud credentials, EVM private keys (`0x[a-fA-F0-9]{64}`), and git credentials; POSTs the JSON result to the hardcoded bare-IP endpoint `http://149.28.127.35:8888` over plain HTTP (configurable only via `C2_URL` env). 2) Crypto wallet stealer: enumerates 71 hardcoded Chrome/Brave/Edge/Firefox wallet extension IDs (MetaMask `nkbihfbeogaeaoehlefnkodbefgpgknn`, Phantom `bfnaelmomeimhlpmgjnjophhpkkoljpa`, Coinbase, Trust, Ledger, etc.), walks browser profile `Local Extension Settings/<walletId>` LevelDB `.log` files matching regex for `vault`, `mnemonic`, `seed`, `privateKey`, `password`, `encrypted`, and recursively scans `~/Documents`, `~/Desktop`, `~/Downloads`, `~/OneDrive`, `~/Dropbox`, `~/Google Drive`, `~/backup`, `~/keys`, `~/wallet`, `~/crypto` for seed-phrase and keystore files, exfiltrating hits to the same C2. The package's advertised purpose (`keywords: [lodash, utilities]`, description "Lodash JavaScript utilities bundle", internal name `lodash-js`) does not match the name `joi-pack` and does not match the payload — `index.js` is an explicit stub ("Just a dummy module. The real payload is in postinstall.js"). Name and keywords are cover-story framing piggybacking on the popular `joi` and `lodash` packages.

References: https://www.npmjs.com/package/joi-pack/v/1.0.4, https://www.npmjs.com/package/joi-pack/v/1.0.5, https://www.npmjs.com/package/joi-pack/v/1.0.3