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Malicious package

@thone33/analytics-injectornpm

Advisory published Updated

@thone33/analytics-injector is a confirmed malicious npm package (MAL-2026-6563) that opens a backdoor for remote access (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @thone33/analytics-injector (npm)

MAL-2026-6563
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @thone33/analytics-injector

What this malware does

Package presents itself as an 'analytics injection helper' with a no-op track() export, but its exported activate() function fetches a JavaScript file from https://raw.githubusercontent.com/Dennisfrr/c2-stager/main/the assessment.js (mutable main branch, no integrity check) and passes the response body directly to eval, with fetch errors silently swallowed. Any consumer that imports and invokes activate() executes attacker-controlled JavaScript with full Node process privileges, and the upstream content can change at any time without a package update. The cover-story naming (analytics-injector / track) alongside a remote source repository explicitly named c2-stager indicates deliberate misdirection rather than a legitimate loader pattern.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

2 flagged
1.0.01.0.1

Indicators of compromise (SHA-256)

1926b397e25982fd701d5c1b84b62b63c430b3af2b668c851e5e90d197e34ebb
dcef0ea3fd19d9b238a097485faaf7db52d5aa4363653fd7fb29f4c0ff251f92
dffa96b1979da8c35802624684971072a7a15da3a35e2daf9d8e9a9f2ec35ce5

Detection & response playbook

Backdoor / remote access
  1. Find it

    Search your lockfiles and build artifacts for @thone33/analytics-injector (2 malicious versions).

  2. If you installed it — respond

    @thone33/analytics-injector 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.

  3. Did it already run?

    If @thone33/analytics-injector 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. @thone33/analytics-injector on npm has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007735IN-MAL-2026-007736GHSA-7mg5-m9qh-r4rp

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @thone33/analytics-injector-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Explore

@thone33/analytics-injector (npm) malicious package — MAL-2026-6563 | O3 Security