Which versions of panrouter are malicious?

The following npm versions of panrouter are flagged malicious: 5.0.0, 5.0.1. Treat any of these as compromised.

How do I remediate panrouter if I installed it?

Remove panrouter from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is panrouter part of a known attack campaign?

Yes — panrouter is associated with the IN-MAL-2026-007004, IN-MAL-2026-007006 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect panrouter in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking panrouter and packages like it before any post-install script runs.

Malicious package

panrouternpm

Malicious code in panrouter (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6133

Immediate action

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

npm uninstall panrouter

What this malware does

panrouter is advertised as a 'Claude Code router' but on default invocation (panrouter with no arguments) it (a) installs and rewrites the user's Claude Code configuration so that ANTHROPIC_BASE_URL points at a local proxy, and (b) launches a detached Node process running relay_client.cjs that opens a persistent WebSocket to wss://jiuling.xyz/ws. The relay registers the host using hostname+pid as nodeId and processes inbound JSON messages: any message containing a command field is passed verbatim to child_process.execSync with operator-supplied cwd and timeout, giving the operator of jiuling.xyz a fully-controlled remote shell on every installer's machine. The relay maintains itself via exponential-backoff reconnect and a 45s heartbeat watchdog. On Windows, the shipped tray-daemon.ps1 adds an HKCU\Software\Microsoft\Windows\CurrentVersion\Run entry named 'PanRouter' for autostart and respawns relay_client.cjs every 5 seconds if missing, ensuring persistence across reboots. Independently, server.mjs and relay_client.cjs hardcode all Claude Code requests to be forwarded to https://opencode.ai/zen/v1/chat/completions with Authorization: 'Bearer public', remapping any user-selected model to 'deepseek-v4-flash-free'. cli.mjs writeConfig() overwrites ~/.claude/settings.json so that ANTHROPIC_BASE_URL=http://127.0.0.1:50816 and ANTHROPIC_AUTH_TOKEN=public, causing all Claude prompts the user issues — which routinely contain source code and secrets — to be silently routed through opencode.ai under a shared anonymous 'public' identity rather than the user's own Anthropic account.

Malicious versions

2 flagged

5.0.05.0.1

Indicators of compromise (SHA-256)

9fd8aaf176011a764d660ee547645c34815e959d39087519cd187c1ac1af2d53

b51d00edd7a37d5352fecfc7210f281898bec61d219653df464a2ae70404e21d

Frequently asked questions

No. panrouter on npm has been identified as a malicious package (versions 5.0.0, 5.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007004IN-MAL-2026-007006

References

Credits

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