Which versions of thief-utils are malicious?

The following PyPI versions of thief-utils are flagged malicious: 1.2.6, 1.2.7. Treat any of these as compromised.

How do I remediate thief-utils if I installed it?

thief-utils 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 thief-utils — how do I know if it already compromised me?

If thief-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.

Is thief-utils part of a known attack campaign?

Yes — thief-utils is associated with the 2026-03-thief-utils, RLMA-2026-01688 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 thief-utils across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for thief-utils (2 malicious versions).

Malicious package

thief-utilsPyPI

Advisory published Mar 13, 2026Updated Apr 1, 2026

thief-utils is a confirmed malicious PyPI package (MAL-2026-1407) that steals credentials and exfiltrates sensitive data (malicious versions 1.2.6, 1.2.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in thief-utils (PyPI)

MAL-2026-1407

Immediate action

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

pip uninstall thief-utils

What this malware does

During installation, package attempts to exfiltrate cloud credentials and sensitive env variables

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-03-thief-utils

Reasons (based on the campaign):

exfiltration-cloud-tokens
exfiltration-generic
exfiltration-env-variables

Malicious versions

2 flagged

1.2.61.2.7

Indicators of compromise (SHA-256)

bcebc8919f53e78dae4adb16168fdd37abea93d969d3411b948ed1781c6faf28

e0a474d2649c9ba53bc5f3a9f3992d78a249d77a356aa33c9d75e47a9d84fdee

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for thief-utils (2 malicious versions).
If you installed it — respond
thief-utils 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 thief-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

No. thief-utils on PyPI has been identified as a malicious package (versions 1.2.6, 1.2.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-03-thief-utilsRLMA-2026-01688

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · analyst
ReversingLabs · finder

Detect & block this

O3 blocks thief-utils-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

All malware advisories How O3 detects malware Vulnerability database