win-update-helper-tool-v2PyPI
Advisory published Updated
win-update-helper-tool-v2 is a confirmed malicious PyPI package (MAL-2026-3246) 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 win-update-helper-tool-v2 (PyPI)
What this malware does
If run as a module, the code runs code to silently control the device via Telegram bot (execute commands, exfiltrate files).
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-system-update-tool
Reasons (based on the campaign):
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rat
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The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.
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files-exfiltration
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peristence-autorun
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persistence
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impersonation
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for win-update-helper-tool-v2 (version 1.0.0).
If you installed it — respond
win-update-helper-tool-v2 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 win-update-helper-tool-v2 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) · reporter
Detect & block this
O3 blocks win-update-helper-tool-v2-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.