Which versions of telco are malicious?

The following PyPI versions of telco are flagged malicious: 1.0.1, 1.0.2. Treat any of these as compromised.

How do I remediate telco if I installed it?

telco 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 telco — how do I know if it already compromised me?

If telco 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 telco part of a known attack campaign?

Yes — telco is associated with the 2025-12-evil-rce 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 telco across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for telco (2 malicious versions).

Malicious package

telcoPyPI

Advisory published Dec 6, 2025Updated Dec 9, 2025

telco is a confirmed malicious PyPI package (MAL-2025-192363) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.1, 1.0.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in telco (PyPI)

MAL-2025-192363

Immediate action

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

pip uninstall telco

What this malware does

Running the module starts a reverse shell

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

Campaign: 2025-12-evil-rce

Reasons (based on the campaign):

The package contains code to create a reverse shell, allowing an attacker to execute any commands on the victim's machine.

Malicious versions

2 flagged

1.0.11.0.2

Indicators of compromise (SHA-256)

55c8199592663c3f388cba22988800084bbc3a5696279eb22c53e837c1d8ac40

ec1b93ebd2da11950753d0cbc248506422d1f4df1bffb5054eef00511aed9e57

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for telco (2 malicious versions).
If you installed it — respond
telco 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 telco 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. telco on PyPI has been identified as a malicious package (versions 1.0.1, 1.0.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2025-12-evil-rce

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks telco-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