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Malicious package

accounts-formsnpm

accounts-forms is a confirmed malicious npm package (MAL-2026-12133) that steals credentials and exfiltrates sensitive data (malicious versions 0.0.2, 33.2.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in accounts-forms (npm)

MAL-2026-12133
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall accounts-forms

What this malware does

On require() of accounts-forms, index.js loads polyfill.js which selects a platform-specific URL and downloads an opaque binary over HTTPS from hardcoded Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT fallback under *.dl.well1.site. The downloaded bytes are written to a hidden path in /tmp (as.cache<hex>) or %TEMP% (as dotnet_diag_<hex>.exe or analytics_state), chmod 0755 on POSIX, and spawned detached via /bin/sh -c or cmd /c start. Destination hostnames are split across array-joined string fragments to evade static analysis, and the dropped binary uses cover-story filenames mimicking diagnostics/analytics artifacts. An opt-out gate keyed on generic telemetry environment variables (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) further disguises the fetch-and-execute chain as telemetry. The fetched executable is unsigned, unversioned, unrelated to any documented package purpose, and delivers attacker-controlled code to the installer's host on load.

Malicious versions

2 flagged
0.0.233.2.6

Indicators of compromise (SHA-256)

bc4d8be7b3e360413a04c895b17353dc61276c737614c629341c547f5b3c7bd9
f17174f805fda0f57e8b471b2a788e92836a2c20d5da22e818ed43218503b0ed

Detection & response playbook

Credential / info stealer
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for accounts-forms (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging accounts-forms across your stack and pipelines.

  2. If you installed it — respond

    accounts-forms 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 accounts-forms was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks accounts-forms before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. accounts-forms on npm has been identified as a malicious package (versions 0.0.2, 33.2.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-014556IN-MAL-2026-014546

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks accounts-forms-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

accounts-forms (npm) malicious package — MAL-2026-12133 | O3 Security