console-fmt-clinpm
Malicious code in console-fmt-cli (npm) Remove it immediately and rotate any exposed credentials.
What this malware does
Malicious npm package published as part of a coordinated DeFi-themed infostealer campaign. console-fmt-cli uses a side-loader technique: it declares decimal-format-core >=3.0 as a dependency, which contains a dropper that executes at install time via a postinstall hook. The dropper fetches a second-stage infostealer from a remote C2 (logstream-api.online) that harvests cryptocurrency wallet vaults (MetaMask, Phantom, Solflare, OKX, Coinbase, TrustWallet, Backpack, TronLink), browser cookies and credentials, SSH keys, AWS credentials, .npmrc tokens, Docker config, shell history, and password manager databases.
Malicious versions
Every published version of this package is considered malicious — remove it entirely.
Detection & response playbook
Credential / info stealerFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for console-fmt-cli (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging console-fmt-cli across your stack and pipelines.
If you installed it — respond
console-fmt-cli 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 console-fmt-cli was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks console-fmt-cli before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
References
Credits
- SafeDep · finder
Detect & block this
O3 blocks console-fmt-cli-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.