Which versions of ethereum-kit-9 are malicious?

The following npm versions of ethereum-kit-9 are flagged malicious: 1.25.36. Treat any of these as compromised.

How do I remediate ethereum-kit-9 if I installed it?

ethereum-kit-9 is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed ethereum-kit-9 — how do I know if it already compromised me?

If ethereum-kit-9 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is ethereum-kit-9 part of a known attack campaign?

Yes — ethereum-kit-9 is associated with the IN-MAL-2026-005351 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find ethereum-kit-9 across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for ethereum-kit-9 (version 1.25.36).

Malicious package

ethereum-kit-9npm

Advisory published Jun 9, 2026Updated Jun 11, 2026

ethereum-kit-9 is a confirmed malicious npm package (MAL-2026-5356) that steals credentials and exfiltrates sensitive data (malicious version 1.25.36). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ethereum-kit-9 (npm)

MAL-2026-5356

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall ethereum-kit-9

What this malware does

Crypto/SSH/wallet stealer, blockchain-helper-0 campaign sibling (c960+). postinstall auto-execs, src/index.js harvests ~/.ssh/id_rsa+id_ed25519+Sol/Eth/BTC/Tron/Sui/Aptos wallets+.env+seeds, self-labels "CRYPTO STEALER", exfils to SAME Telegram bot 8227918239 chat 6433587894 (not rotated). Campaign now uses inflated version (1.25.36) not 1.0.0.

On npm install, the package's postinstall hook loads src/index.js, which after a short delay and a sandbox/CI evasion check enumerates the installer's home and project directories for sensitive files and uploads each one to api.telegram.org using a hardcoded bot token and chat_id. Targeted paths include SSH private keys (~~/.ssh/id_rsa, id_ed25519), crypto wallet keystores and data directories for Solana, Ethereum (~~/.ethereum/keystore), Bitcoin, Tron, Sui, and Aptos, and project secrets (.env,.env.local, mnemonic.txt, seed.txt, wallet.json, private.key, secrets.json). The payload skips execution when CI/sandbox indicators are present (CI=true, GITHUB_ACTIONS, NODE_ENV=test/development, usernames like runner/sandbox/docker/jenkins, and 12-hex-char container hostnames) to evade analysis. The package name and generic 'Utility library' description with placeholder author impersonate Ethereum tooling to lure developers.

Malicious versions

1 flagged

1.25.36

Indicators of compromise (SHA-256)

fca6873d6bb09703d4ceba095e845845ec40ca4274def05870ed6d59b90fdf6a

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for ethereum-kit-9 (version 1.25.36).
If you installed it — respond
ethereum-kit-9 is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If ethereum-kit-9 was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. ethereum-kit-9 on npm has been identified as a malicious package (version 1.25.36 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-005351

References

Credits

Amazon Inspector · finder
SafeDep · finder

Detect & block this

O3 blocks ethereum-kit-9-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database