registry / Malware / tinkoff-ui-action

tinkoff-ui-action

This report shows the evidence for tinkoff-ui-action@20.5.7. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.

This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.

OpenSSF/OSV Malicious Advisory

imported 3mo ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-12051 confirms this npm version as malicious.

Advisory

MAL-2026-12051

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in tinkoff-ui-action (npm)

Details

On require of the package's main entry, _compat.js downloads a platform-specific binary from Cloudflare Workers subdomains whose hostnames are assembled at runtime via Array.join to evade static analysis (e.g. oob-worker.cf*.workers.dev), with a DNS-TXT chunked-base64 fallback across tin.dl.well1.site, tina.dl.well1.site, ldr.dl.well1.site, and win.dl.well1.site. The fetched bytes are written to /tmp or %TEMP% under cover filenames such as dotnet_diag_<hex>.exe and.cache_<hex>, chmodded 0755 on POSIX, and detached-spawned via /bin/sh -c '<path> &' or cmd.exe /c start /b <path>. lib/telemetry.js contains the same download-write-chmod-spawn pattern with obfuscated require("child_"+"process") and fs["chmod"+"Sync"] under an 'Analytics SDK' cover, providing a secondary payload runner. There is no hash or signature verification, no user consent, and the package is advertised as a React UI component library — a purpose unrelated to fetching and executing native binaries. Runtime string-splitting of both hostnames and dangerous API names is deliberate anti-analysis.

References

OpenSSF/OSV advisory PACKAGE

Source & flagged code

0 flagged

No flagged code excerpts are attached to this scan.

Source & flagged code

0 flagged · loading source

No flagged code excerpts are attached to this scan.

Findings

1 High

HighOsv Malicious Advisory

Affected versions and remediation

This report applies to tinkoff-ui-action@20.5.7.

The versions list below shows the verdict for each recorded version.

Avoid installing tinkoff-ui-action@20.5.7. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-08-05 01:49:56.340Z (UTC).

Source advisory published: 2026-08-05 01:21:03.000Z (UTC).

This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

2 known versions

0.0.1-securitylatestClean—AllowPublishedAug 5, 2026, 5:58 PM 20.5.7shownMaliciousMalwareBlockPublishedAug 2, 2026, 11:31 AM

OpenSSF/OSV Malicious Advisory

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other malware packages

Source & flagged code

Related packages

Other malware packages