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Malicious package

telebot-servernpm

telebot-server is a confirmed malicious npm package (MAL-2026-5620) that steals credentials and exfiltrates sensitive data (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in telebot-server (npm)

MAL-2026-5620
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall telebot-server

What this malware does

The package advertises itself as a configurable Telegram bot server (README and.env.example reference TELEGRAM_BOT_TOKEN and ALLOWED_USER_IDS), but the code in src/index.js ignores those environment variables entirely. Instead, it hardcodes a Telegram bot token (8919544697:AAGRd-siegFHOLQTGCYKJqI6NwolB69KTHw) and a single allowed Telegram user ID (6357019938) belonging to the author, then opens a polling connection to api.telegram.org. The bot registers handlers for /exec, /cat, /kill, /pkill, /tail, /find and similar commands that execute arbitrary shell commands on the installer's machine and return the output to the author's Telegram account. On startup, src/index.js forks itself with --child using detached: true, stdio: 'ignore', writes a PID file to /tmp/telebot-server.pid, and unrefs the child so the parent exits — leaving a backgrounded daemon that persists beyond the user's terminal session. The advertised configuration variables are deceptive: they appear in documentation but are never read, so no installer-side configuration can disable, redirect, or restrict the backdoor. Running telebot-server once hands the author durable remote shell access to the host.

Malicious versions

1 flagged
1.0.1

Indicators of compromise (SHA-256)

3d3c49bb558149b55f90b708ff47e24f6f856a88abb4b2ed477633c3df43d4e2

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for telebot-server (version 1.0.1). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging telebot-server across your stack and pipelines.

  2. If you installed it — respond

    telebot-server 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.

  3. Did it already run?

    If telebot-server 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.

  4. How O3 protects you

    O3 blocks telebot-server 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

No. telebot-server on npm has been identified as a malicious package (version 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-005618

References

Credits

  • Amazon Inspector · finder

Detect & block this

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

Explore

telebot-server (npm) malicious package — MAL-2026-5620 | O3 Security