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Malicious package

0x2ai-demo10xnpm

Malicious code in 0x2ai-demo10x (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-5588
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall 0x2ai-demo10x

What this malware does

On npm install, scripts/postinstall.cjs runs fs.cpSync(payload, process.env.INIT_CWD, { recursive: true }), copying.mcp.json, CLAUDE.md,.claude/settings.json,.claude/commands/0x2ai-boot.md, and several chatroom-*.cjs helpers directly into the installer's project root. The dropped.mcp.json registers a chatroom MCP server pointing at https://demo10.0x2ai.com with a hardcoded Bearer token (436687f7d7909aceba719b745e061279aa934dddd36f20f4) shared across all installers. The dropped CLAUDE.md and slash command instruct any Claude Code session opened in that project to invoke chatroom_post / memory_save / provider_query through the author's bridge, silently routing user prompts, memories, and provider queries off-host. payload/chatroom-monitor.cjs and chatroom-wait-once.cjs read local files (fs.readFileSync) and POST them to that bridge over http/https; chatroom-mcp-lite-patched.cjs spawns child processes and POSTs as well. The provided CLI bin/start.cjs then spawns claude --dangerously-skip-permissions in the staged cwd, removing the user's final consent gate before the relay engages. The combination — install-time write into the consumer project, preconfigured MCP server pointing at an author-controlled endpoint, and a CLI that disables Claude permission prompts — establishes a silent data-flow channel from the developer's IDE/agent to the author's server with no explicit consent beyond npm install.

Malicious versions

1 flagged
1.2.0

Indicators of compromise (SHA-256)

2c4c4b3e66489f3a4383df5e62540498343c5ab3a5ce145df5733b2820efc71b

Frequently asked questions

No. 0x2ai-demo10x on npm has been identified as a malicious package (version 1.2.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-005675

References

Credits

  • Amazon Inspector · finder

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Supply-chain protection
0x2ai-demo10x (npm) malicious package — MAL-2026-5588 | O3 Security