npm-bug-bounty-test1-rhyselsmorenpm
Advisory published Updated
npm-bug-bounty-test1-rhyselsmore is a confirmed malicious npm package (MAL-2026-6354) that executes malicious code on install (malicious version 1.0.5). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in npm-bug-bounty-test1-rhyselsmore (npm)
What this malware does
package.json declares a dependency foo whose source URL is https://3223567a82f3.ngrok.app/foo — an ephemeral, anonymous ngrok tunnel with no version pin and no integrity hash. On npm install, npm fetches whatever tarball the tunnel currently serves and runs its lifecycle scripts (preinstall/install/postinstall) on the installer's machine. The tunnel operator can swap the served bytes at any time, so the package effectively delegates arbitrary code execution at install time to whoever controls the ngrok endpoint. The package itself has no functional surface: the declared main: index.js is absent from the tarball (which contains only a foo text file and package.json), so the only observable effect of installing it is the dependency-resolution fetch from the attacker-controlled tunnel. Package naming suggests this may be a bug-bounty proof of concept, but the install-time mechanism is identical to a real dropper.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for npm-bug-bounty-test1-rhyselsmore (version 1.0.5).
If you installed it — respond
Remove npm-bug-bounty-test1-rhyselsmore 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.
Did it already run?
If npm-bug-bounty-test1-rhyselsmore 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
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks npm-bug-bounty-test1-rhyselsmore-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.