telepycorePyPI
Advisory published Updated
telepycore is a confirmed malicious PyPI package (MAL-2025-191889) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.1, 1.5.2, 1.5.3…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in telepycore (PyPI)
What this malware does
Package can only be used (requires additional triggering) to install a remote executable, ensure it starts on logon and name mimic network service. Though different versions contain different executables, they are mostly identified as malicious by multiple AVs and sandboxes, highlighting adding Defender exclusions and downloading further executables.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-04-telepycore
Reasons (based on the campaign):
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peristence-autorun
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Downloads and executes a remote executable.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for telepycore (9 malicious versions).
If you installed it — respond
telepycore 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 telepycore 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
Campaign
References
Credits
- Kamil Mańkowski (kam193)
Detect & block this
O3 blocks telepycore-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.