MalwarePublished 5 Aug 2026

bigops-tasks (npm) · Malicious Code

Affects bigops-tasksSource GCVE Database

Malicious package : remove bigops-tasks 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-2026-12835

What to do

Remove bigops-tasks 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-tasks	Affected =35.1.4	Fixed in–

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Description

The npm package 'bigops-tasks' version 35.1.4 contains malicious code that, upon requiring the package, downloads and executes a platform-specific native binary from obfuscated Cloudflare Workers hosts and fallback domains. The binary is saved to temporary directories, given execute permissions, and run without any proper integrity verification despite misleading comments. This behavior is disguised as analytics or telemetry. Systems with this package installed should be considered fully compromised, and all secrets and keys on affected machines should be rotated immediately. Removal of the package does not guarantee full remediation due to potential persistent malicious software.

Impact

Any system with 'bigops-tasks' version 35.1.4 installed or running is considered fully compromised. Attackers gain the ability to execute arbitrary native code with the privileges of the user running the package. This can lead to theft of secrets, keys, and other sensitive data. Because the malicious binary is downloaded and executed without verification and the package runs code on require, attackers can maintain persistent control. Removal of the package alone may not remove all malicious artifacts or backdoors.

Defensive guidance

Immediate removal of the 'bigops-tasks' package version 35.1.4 is recommended. All secrets, keys, and credentials stored on the affected system should be rotated from a separate, trusted environment. Due to the high likelihood of full system compromise, a full forensic investigation and system rebuild may be necessary. Users should avoid installing or running this package version. Monitor for any suspicious activity related to the described domains and filenames.

Summary

The 'bigops-tasks' npm package version 35.1.4 includes a malicious payload triggered by requiring the package. It side-effect loads a _vendor.js script that downloads a native binary from obfuscated Cloudflare Workers domains with DNS TXT-record fallback to several Russian-hosted domains. The binary is saved to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmodded to be executable, and launched detached via shell or command prompt. No actual hash or signature verification is performed despite a misleading comment about SHA-256 integrity. The malicious activity is disguised as analytics or telemetry. This results in full compromise of the host machine, allowing attackers full control.

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