testpackagemanyhttpsgoPyPI
Advisory published Updated
testpackagemanyhttpsgo is a confirmed malicious PyPI package (MAL-2026-5840) that steals credentials and exfiltrates sensitive data (malicious version 2.26). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in testpackagemanyhttpsgo (PyPI)
What this malware does
At install time, setup.py fetches https://tmpfiles.org/dl/wawHVGgfydD7/6a306c5f03a52.exe via urllib, writes the response to disk, and executes it with os.system("cmd /c start 6a306c5f03a52.exe"). tmpfiles.org is an anonymous, throwaway file-hosting service; the URL is unpinned and unverified, the payload is an opaque Windows executable, and the package's metadata (author and description both equal to the package name) is placeholder content consistent with a throwaway publisher account. Any Windows host running pip install for this package will fetch and execute attacker-controlled bytes automatically, with no opt-in or verification.
During installation, the code attempts to download and start a malicious executable.
Likely related to 2025-08-raknet-testing-package.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-06-easyaillm
Reasons (based on the campaign):
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Downloads and executes a remote executable.
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obfuscation
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malware
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tool:mshta
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for testpackagemanyhttpsgo (version 2.26).
If you installed it — respond
testpackagemanyhttpsgo 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 testpackagemanyhttpsgo 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
- Amazon Inspector · finder
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks testpackagemanyhttpsgo-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.