MAL-2026-10580 Malicious code in ethers-core (npm)
Malicious package
Published
MAL-2026-10580 is a malicious package: ethers-core (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-2026-10580/ (Markdown: https://insights.sbomify.com/MAL-2026-10580/index.md)
- Package
- ethers-core
- Registry
- npm
What is MAL-2026-10580?
MAL-2026-10580 is a malicious package in ethers-core, published on 14 Jul 2026.
Official description
Package name typosquats the popular 'ethers' library. package.json declares a postinstall pointing at dist/index.min.js, whose sole top-level statement is eval(Buffer.from('<base64>','base64').toString()). The decoded payload enumerates installer secrets (env vars including PRIVATE_KEY, MNEMONIC, AWS_SECRET_ACCESS_KEY, GITHUB_TOKEN, NPM_TOKEN; files including.env, ~/.aws/credentials, ~/.ssh/id_rsa, ~/.npmrc, wallet.json, keystore.json, seed.txt) and POSTs them to a hardcoded Telegram bot endpoint at api.telegram.org. Any 64-hex or WIF private key recovered is loaded into an ethers.Wallet, balance-checked against cloudflare-eth.com, and drained via sendTransaction to hardcoded attacker ETH/BTC addresses (ETH 0x72bC6c85847136…, BTC bc1qvg0vmlxf2ly248my69r2k6zut8s4q93j9mqvtf); BTC transactions are pushed via blockchain.info/pushtx. Persistence is established by appending 'node /tmp/sys-core.js &' to ~/.bashrc, ~/.zshrc, and ~/.profile, writing ~/.config/autostart/sys-core.desktop, and dropping /tmp/sys-core.js, which polls an attacker webhook via child_process.exec. A companion config/attacker-config.json ships the attacker's Telegram bot token, chat_id, wallet destinations, and target secret path/env-var list.
What should I do about MAL-2026-10580?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.