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Malicious package

event-bus-lite-testmetestnpm

Advisory published Updated

event-bus-lite-testmetest is a confirmed malicious npm package (MAL-2026-18292) that executes malicious code on install (malicious version 0.0.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in event-bus-lite-testmetest (npm)

MAL-2026-18292
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall event-bus-lite-testmetest

What this malware does

The package ships a binding.gyp whose target has type "none" and no C/C++ source files; its only purpose is a GYP <!(...) command-expansion that runs node index.js during the automatic node-gyp rebuild triggered by npm install. index.js is multi-layer obfuscated: a char-code array is Caesar-decoded (shift 21) and passed to eval; the decoded body reads the bundled lib_native.dat (~312 KB, high-entropy, sha256 e1ab1e330d3db532d511d4af4386ab2d2c6245ca807410f51c1211ae48814d73), brotli-decompresses and AES-128-GCM-decrypts it with hardcoded key/IV/AAD, writes the plaintext to a mkdtempSync('.b-')/index.js temp path, and spawns the Bun runtime (Bun.spawn, or getBunPath() via child_process.spawn) to execute the decrypted payload. Executing under Bun bypasses Node-only analysis. The contents of the executed payload are not inspectable from the shipped artifact.

Malicious versions

1 flagged
0.0.6

Indicators of compromise (SHA-256)

038b62e6040cef7e651f3cf89c146290f391c28977fe206410408e85ccbe4721

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for event-bus-lite-testmetest (version 0.0.6).

  2. If you installed it — respond

    Remove event-bus-lite-testmetest 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 activity or persistence.

  3. Did it already run?

    If event-bus-lite-testmetest was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. event-bus-lite-testmetest on npm has been identified as a malicious package (version 0.0.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-021710

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks event-bus-lite-testmetest-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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event-bus-lite-testmetest (npm) malicious package — MAL-2026-18292 | O3 Security