MAL-2026-12387 Malicious code in gekko-mev-bot (npm)
Malicious package
Published
MAL-2026-12387 is a malicious package: gekko-mev-bot (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-12387/ (Markdown: https://insights.sbomify.com/MAL-2026-12387/index.md)
- Package
- gekko-mev-bot
- Registry
- npm
What is MAL-2026-12387?
MAL-2026-12387 is a malicious package in gekko-mev-bot, published on 5 Aug 2026.
Official description
The package presents itself as an Ethereum MEV bot, but bin/gekko-bot.js silently spawns lib/stealth.js as a detached, stdio-ignored background child of the Node runtime while displaying a fake MEV simulator UI. lib/stealth.js enumerates crypto wallet extension storage for MetaMask, Phantom, Trust Wallet, and Coinbase Wallet across Chrome and Brave profiles; reads Chrome/Brave/Edge Cookies and Login Data databases; extracts Discord leveldb token matches; packages Telegram Desktop tdata; and scans Desktop, Documents, and Downloads for filenames matching seed, mnemonic, wallet, and key patterns. The collected payload, together with os.hostname() and os.userInfo() host identifiers, is POSTed via https.request to a hardcoded Cloudflare Workers endpoint at https://c2-proxy.metamasksvc.workers.dev/api/logs that impersonates the MetaMask brand. The background process retries on failure after 30 seconds.
What should I do about MAL-2026-12387?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.