Critical

14 Trojanized npm Packages Drop RedC2 4.0 Linux Backdoor With AI-Assisted C2

The Hacker News

August 21, 2026 at 6:53 PM

Actively Exploited

Overview

Researchers have identified 14 malicious npm packages disguised as calendar and streak utilities that deliver a Linux backdoor known as RedC2 4.0. When these trojanized packages are activated, they execute a bundled binary in the background, allowing attackers to control compromised systems. This type of threat is particularly concerning because it targets developers and users who rely on npm for legitimate software, potentially leading to widespread system vulnerabilities. Users of affected systems need to be cautious and ensure they are not using these harmful packages. The incident serves as a reminder for developers to vet their dependencies carefully and for organizations to monitor their environments for any unauthorized software.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: npm packages, Linux systems
Action Required: Users should remove any suspicious npm packages and monitor for unusual activity on their systems.
Timeline: Newly disclosed

Original Article Summary

Cybersecurity researchers have discovered a set of trojanized npm packages that masquerade as working calendar and streak utilities but are engineered to stealthily deliver an artificial intelligence (AI)-powered Linux implant dubbed RedC2 4.0. "When the module loads, it locates the bundled binary, marks it executable, and launches it as a detached background process," TrendAI, Trend Micro's

Impact

npm packages, Linux systems

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Users should remove any suspicious npm packages and monitor for unusual activity on their systems. Regularly updating software dependencies and utilizing security tools to scan for vulnerabilities is also recommended.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Linux, Malware, Trend Micro.

Read Original Article

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