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  5. Malicious npm Packages Deliver Overlord RAT in Supply Chain Attack
CybersecurityMAG 6Bearish
•
2026-10-07•2 min read

Malicious npm Packages Deliver Overlord RAT in Supply Chain Attack

Zubiqo Take
QuoteThreads

“Relying on developers to audit the thousands of nested dependencies pulled by automated package managers guarantees persistent access for threat actors.”

Malicious npm Packages Deliver Overlord RAT in Supply Chain Attack
📷 Image Source: The Hacker News

Executive Summary

  • •Researchers uncovered an npm supply chain campaign delivering remote access trojans and information stealers.
  • •Eight malicious packages generated 40,767 downloads, with the "function-flag" vector accounting for 37,419 installations.
  • •The malware utilizes automated lifecycle hooks to retrieve hidden payloads and harvest sensitive environment data.

Community Sentiment

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Key Developments & Data

Researchers from CloudSEK and Checkmarx identified the MALFEX campaign, attributed to a single Portuguese-speaking threat actor who published 12 packages since August 2023. Eight of the packages were flagged as malicious, generating a collective 40,767 downloads across compromised hosts. The package "function-flag" drove the vast majority of the activity with 37,419 downloads, utilizing a postinstall script and an ASCII art function to trigger hidden payload retrievals. The campaign delivers information stealers and Overlord RAT, a payload recently linked to July 2026 campaigns exploiting WordPress flaws and distributing fake macOS Zoom installers. "The operator is Portuguese-speaking, the git commits sit at -0300, one repository description is in Portuguese, and the GitHub display name and email give a common Brazilian handle." — CloudSEK

Zubiqo Strategic Assessment

Primary Impact

Enterprise software developers and organizations relying on automated npm package resolution are most at risk of credential theft and remote access compromise.

Strategic Shift

Threat actors are increasingly treating open-source package registries as primary delivery networks, exploiting automated lifecycle hooks to bypass traditional perimeter security.

The Ripple Effect

Continued exploitation of npm postinstall scripts will force enterprise security teams to aggressively restrict or sandbox dependency execution during CI/CD pipeline builds.

This intelligence assessment is generated by Zubiqo's AI for informational purposes only.

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#npm#malware#overlord rat#supply chain#infosec
Read original on The Hacker News
Zubiqo MethodologyAI Synthesis

Synthesized from linked market reporting using AI extraction under Zubiqo's editorial standards. Have a correction? Contact our desk.

Event Magnitude6 / 10
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Synthesized from linked market reporting using AI extraction under Zubiqo's editorial standards. Have a correction? Contact our desk.

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