MalwarePublished 5 Aug 2026

bigops-tcrm-auth (npm) · Malicious Code

Affects bigops-tcrm-authSource GCVE Database

Malicious package : remove bigops-tcrm-auth and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 19:36 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12837

What to do

Remove bigops-tcrm-auth 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
npmbigops-tcrm-auth	Affected =35.8.5	Fixed in–

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Description

The npm package bigops-tcrm-auth version 35.8.5 contains malicious code that downloads and executes a native binary from obfuscated and suspicious hosts. It disguises its payload delivery using runtime hostname assembly, DNS TXT record fallback, and file name obfuscation. The package masquerades as an authentication module but performs unauthorized code execution, posing a severe risk to any system where it is installed.

Impact

Any system with this package installed or running should be considered fully compromised. The malicious code grants remote attackers the ability to execute arbitrary native binaries, potentially leading to full system takeover. All secrets and keys stored on the affected system are at risk and should be rotated immediately from a secure environment. Removing the package alone may not eliminate all malicious components due to the potential for persistent backdoors or additional malware installed by the payload.

Defensive guidance

Immediate removal of the bigops-tcrm-auth package version 35.8.5 is strongly recommended. All credentials and secrets stored on the affected system should be rotated from a different, uncompromised machine. Due to the high likelihood of full system compromise, a thorough forensic investigation and system rebuild may be necessary. Avoid using this package and monitor for any suspicious activity related to it.

Summary

The bigops-tcrm-auth npm package (version 35.8.5) includes a malicious setup that, upon loading, downloads a native binary payload from Cloudflare Workers subdomains with dynamically assembled hostnames and a DNS TXT fallback mechanism from *.dl.wel1.ru resolvers. The payload is saved to temporary directories under disguised filenames, permissioned to be executable, and then executed via shell commands. The package also contains a telemetry module that replicates these dropper behaviors at scale. This unauthorized behavior is inconsistent with its advertised purpose as an authentication module and indicates a fully compromised package designed to execute arbitrary native code on the host system.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:36 UTC

Technical details

References

Community reviews