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Malicious package

discord-mfa-solvernpm

Advisory published Updated

discord-mfa-solver is a confirmed malicious npm package (MAL-2026-16100) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.0, 1.0.1, 1.0.2…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in discord-mfa-solver (npm)

MAL-2026-16100
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall discord-mfa-solver

What this malware does

On require of the package, lib/cache.js (reached from index.js) executes try{module['require']('node-net-pool')}catch(_){} — a bracket-notation, error-swallowed dynamic require of the declared dependency node-net-pool (^1.0.0 in package.json). The dependency is never referenced elsewhere and its return value is discarded, so the only effect of importing this package is to execute whatever top-level code node-net-pool runs on the installer's machine. The visible source presents as a Discord API client; the README additionally describes an asset-prefetch pipeline that downloads a remote runtime patch and spawns it via child_process.execFile, but no such code (no _SEGS, no _pullAsset, no _spawnWorker, no child_process usage) exists in the shipped tarball. The mismatch between documented behavior and shipped source, combined with the hidden dynamic require of an otherwise-unused dependency, is a loader-stub shape whose payload lives in the transitively-installed node-net-pool. Separately, the package advertises itself as Discord MFA / vanity-url abuse tooling and exercises /api/v9/guilds/0/vanity-url and /api/v9/mfa/finish with caller-supplied tokens against Discord targets — that portion is operator-directed third-party abuse and does not itself harm the installer.

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

4 flagged
1.0.01.0.11.0.21.0.3

Indicators of compromise (SHA-256)

447fc485deb497c4e8b7310efa4dd48c82c67bdb1b063ef3afa8b183519b191b
a91086c84ad0836c4b32ee5db890c9a6d9543f00e9dd31d18aed8a6acc9bdb3e
f225d62852a2181e36cbea8fbe07ea23921cf1ba07e84eb7dd3cef030cd9c6d9
397e64d0ed82bfc13ede94f1c8bd90c12072b12e11657afca16872a92423188a
59a6cc9b3233c6e824a129b910428abecf200adf505a9fe251afc688ec4fb66a

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for discord-mfa-solver (4 malicious versions).

  2. If you installed it — respond

    discord-mfa-solver is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If discord-mfa-solver 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. discord-mfa-solver on npm has been identified as a malicious package (versions 1.0.0, 1.0.1, 1.0.2, 1.0.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-019898IN-MAL-2026-019899IN-MAL-2026-019897IN-MAL-2026-020022GHSA-vf4w-775x-ccfh

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks discord-mfa-solver-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

discord-mfa-solver (npm) malicious package — MAL-2026-16100 | O3 Security