Which versions of md5-en are malicious?

The following PyPI versions of md5-en are flagged malicious: 0.1.0, 0.2.0. Treat any of these as compromised.

How do I remediate md5-en if I installed it?

md5-en 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 md5-en — how do I know if it already compromised me?

If md5-en 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 md5-en part of a known attack campaign?

Yes — md5-en is associated with the RLMA-2025-05621, 2025-10-md5-en, RLUA-2026-00505 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 md5-en across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for md5-en (2 malicious versions).

Malicious package

md5-enPyPI

Advisory published Oct 15, 2025Updated Mar 19, 2026

md5-en is a confirmed malicious PyPI package (MAL-2025-191649) that steals credentials and exfiltrates sensitive data (malicious versions 0.1.0, 0.2.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in md5-en (PyPI)

MAL-2025-191649

Immediate action

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

pip uninstall md5-en

What this malware does

Code downloads and starts an executable widely recognized as malware, then sends some results to a Telegram webhook.

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

Campaign: 2025-10-md5-en

Reasons (based on the campaign):

malware
Downloads and executes a remote executable.
obfuscation

Malicious versions

2 flagged

0.1.00.2.0

Indicators of compromise (SHA-256)

96ff96a78d323397493c43cc1c7e74aae0b698237a44c0db7794dd9da89bca1c

5c5f8392ba7d0abbe13ff70f46a7f112ba0ef16f6068faba47aff0c610b5d89d

1c7608df27812e170abf1fa650287b87174700cd5a23658ae8d81317f7cd93dc

62d127c876b3f452a6f8c85e005fa4d64007a81f96ae4bc56643835ff08e375d

d14d553efe50d24656274ed4b92c19da853a0edc4098c4734c3409857777cbb0

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for md5-en (2 malicious versions).
If you installed it — respond
md5-en 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 md5-en 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. md5-en on PyPI has been identified as a malicious package (versions 0.1.0, 0.2.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-056212025-10-md5-enRLUA-2026-00505

References

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks md5-en-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