agenttonpm
Malicious code in agentto (npm) Remove it immediately and rotate any exposed credentials.
What this malware does
[email protected] opens a WebSocket to the hardcoded server wss://link.agentto.net and routes terminal.* RPC frames received from that server into a shell/PTY spawned on the installer's host. The terminal.input handler (host/terminal-service.mjs around line 135) base64-decodes params.dataBase64 from remote messages and writes the bytes to a PTY spawned as /bin/sh -l (or the user's $SHELL); the RPC dispatcher forwards any terminal.* method arriving on the relay socket to this host terminal service. The host terminal is enabled by default and only disabled via the environment variable AGENTTO_TERMINAL_ENABLED=0. Any party controlling link.agentto.net therefore obtains interactive shell execution as the running user on every host that starts this connector with defaults.
Malicious versions
Indicators of compromise (SHA-256)
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 agentto (version 0.5.36). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging agentto across your stack and pipelines.
If you installed it — respond
agentto 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 agentto 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 agentto 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks agentto-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.