Which versions of fmt-helpers-794b are malicious?

The following npm versions of fmt-helpers-794b are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate fmt-helpers-794b if I installed it?

fmt-helpers-794b 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.

I already installed fmt-helpers-794b — how do I know if it already compromised me?

If fmt-helpers-794b 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.

Is fmt-helpers-794b part of a known attack campaign?

Yes — fmt-helpers-794b is associated with the IN-MAL-2026-006962, GHSA-4wmf-8x9r-34cc campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find fmt-helpers-794b across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for fmt-helpers-794b (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging fmt-helpers-794b across your stack and pipelines.

Malicious package

fmt-helpers-794bnpm

fmt-helpers-794b is a confirmed malicious npm package (MAL-2026-6092) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fmt-helpers-794b (npm)

MAL-2026-6092

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall fmt-helpers-794b

What this malware does

Package declares a postinstall lifecycle hook ("postinstall": "node run.js" in package.json) that runs run.js automatically on npm install. run.js imports os, fs, http, https, and child_process and reads host identification fields (os.hostname(), os.platform()), performs filesystem reads (fs.readFileSync, fs.existsSync), and issues multiple outbound POST calls (run.js lines 131, 134, 345, 352). The combination of automatic install-time execution, host/filesystem reconnaissance, and outbound HTTP POSTs is the canonical install-time exfiltration shape with no legitimate library purpose presented in the package. Installing this package causes immediate execution of code that collects installer host data and ships it off-host.

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

1 flagged

1.0.0

Indicators of compromise (SHA-256)

19b05306978ff506805f118049f81c74c5da1503bb34fd14a2a57d4e6faac52c

3aca1041e88b5f01d4d06b372aebdd36015952d30d7ea18f9dc9c7a7f33df351

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for fmt-helpers-794b (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging fmt-helpers-794b across your stack and pipelines.
If you installed it — respond
fmt-helpers-794b 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.
Did it already run?
If fmt-helpers-794b 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.
How O3 protects you
O3 blocks fmt-helpers-794b 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. fmt-helpers-794b on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-006962GHSA-4wmf-8x9r-34cc

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks fmt-helpers-794b-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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