MalwarePublished 5 Aug 2026

tinkoff-codeceptjs-storyshots (npm) · Malicious Code

Affects tinkoff-codeceptjs-storyshotsSource GCVE Database

Malicious package : remove tinkoff-codeceptjs-storyshots and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 19:24 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12236

What to do

Remove tinkoff-codeceptjs-storyshots from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmtinkoff-codeceptjs-storyshots	Affected =20.7.8	Fixed in–

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Description

The npm package tinkoff-codeceptjs-storyshots contains malicious code that downloads and executes platform-specific binaries from external hosts upon being required. It disguises this behavior under a fake telemetry framework and uses obfuscation techniques to evade detection. Installing or running this package can lead to full system compromise, and all secrets on the affected machine should be considered exposed. Immediate removal and secret rotation from a different machine are strongly advised.

Impact

Any system with this package installed or running is considered fully compromised, allowing an attacker to execute arbitrary code with the privileges of the user running the package. All secrets and keys stored on the compromised system should be assumed exposed and must be rotated immediately from a secure environment. Removing the package alone may not eliminate all malicious artifacts or backdoors introduced by the attacker.

Defensive guidance

Remove the tinkoff-codeceptjs-storyshots package immediately from all affected systems. Rotate all secrets and keys that were stored or accessible on the compromised machines using a separate, secure system. Conduct a thorough investigation for persistence mechanisms or additional malware, as full system compromise is likely. There is no known patch or official fix; remediation relies on removal and secret rotation.

Summary

The tinkoff-codeceptjs-storyshots npm package, specifically version 20.7.8, includes malicious code in its index.js that unconditionally loads a helper script which downloads platform-specific binaries from Cloudflare Workers domains and fallback DNS-TXT channels. These binaries are saved to temporary directories with decoy names, permissions set to executable, and then executed detached from the main process. The package uses string concatenation and array joins to obfuscate hostnames and function calls, evading static analysis. The telemetry and analytics framing is a cover story, and the package namespace falsely implies association with the legitimate Tinkoff organization. This behavior results in full compromise of any system where the package is installed or running.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:24 UTC

Technical details

References

Community reviews