MalwarePublished 21 May 2026Updated 8 Jul 2026

utils-mf (npm) · Malicious Code

Affects utils-mfSource GCVE Database

Malicious package : remove utils-mf and rotate any secrets on hosts that installed it.

Data as of 9 Jul 2026, 10:04 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-4699

What to do

Remove utils-mf 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
npmutils-mf	Affected 11.2.4 – 12.1.1 10 affected builds	Fixed in–

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Description

The npm package 'utils-mf' contains malicious code that executes immediately upon import. It includes a hidden WhatsApp bot that collects user credentials, periodically exfiltrates local chat and session data to attacker-controlled GitHub and GitLab repositories, silently self-updates by overwriting its own code from the npm registry, and executes privileged system commands to install software and manipulate system files. This behavior constitutes an active supply-chain attack that compromises any system installing this package. Removal of the package does not guarantee full remediation due to potential persistent compromise.

Impact

Systems that install or run this package are fully compromised. Sensitive local data including chats, contacts, and session credentials are exfiltrated to attacker-controlled repositories. The package can silently update itself to any future malicious version, bypassing normal dependency controls. It executes privileged commands on the host system, potentially enabling further system compromise. All secrets and keys stored on affected systems should be considered exposed and rotated immediately. Removal of the package alone may not eliminate all malicious components due to the extent of control gained by the attacker.

Defensive guidance

Immediate removal of the 'utils-mf' package is strongly recommended. Due to the high likelihood of full system compromise, all secrets, credentials, and keys stored on the affected system should be rotated from a separate, trusted environment. Systems suspected of running this package should be treated as compromised and undergo thorough incident response and forensic analysis. Monitor for any unauthorized outbound connections or suspicious processes related to WhatsApp bot activity or self-updating behaviors. Avoid reinstalling or using this package in any environment.

Summary

The 'utils-mf' npm package is a malicious supply-chain threat that executes harmful actions when imported. It dynamically loads a WhatsApp bot payload that captures and stores authentication credentials locally. Every 30 seconds, it uploads sensitive local data including chats, contacts, and session states to attacker-controlled GitHub and GitLab repositories using embedded tokens. On load, it fetches the latest package version from the npm registry and silently overwrites its own installation directory, enabling ongoing remote code execution regardless of dependency lockfiles. Additionally, it runs privileged shell commands to install utilities like ffmpeg and git if missing, clears temporary files, and collects network connection data. This combination of obfuscated code, automatic data exfiltration, self-mutation, and privileged command execution represents a severe supply-chain compromise.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Jul 2026, 10:04 UTC

Technical details

References

Community reviews