Red Nue

Executive Summary

Red Nue (LuoYu) is an active cyber threat group known for its sophisticated malware toolkit targeting regions in Asia. They use multiplatform backdoors like LootRAT and WinDealer, and have demonstrated the ability to compromise systems via watering hole attacks. Their activities pose significant risks to targeted sectors through data exfiltration and persistent access.

Goals & Targeting

The goals of Red Nue appear to center around strategic data collection and potential espionage activities, targeting regions and sectors where sensitive information is held. They focus on Asia, possibly with motivations tied to regional political or economic interests. Their choice of watering hole attacks indicates a tactic to compromise trustable sites within target communities, maximizing their effectiveness in infiltrating networks.

Red Nue, operating since at least 2017, is primarily known for deploying the multi-platform LootRAT backdoor, which has variants for Windows, Macintosh (referred to as Demsty), and Android (SpyDealer). The group also utilizes WinDealer, a Windows-based backdoor deployed in a 2019 watering hole campaign targeting a Chinese news website frequented by the diaspora community. Red Nue's campaigns indicate a strategic focus on sectors within Asia, suggesting potential interests in espionage or information theft. Their use of advanced malware highlights their technical capabilities and persistence in compromising target systems for long-term access.

Key Capabilities

• Multi-platform malware deployment
• Watering hole attack techniques
• Persistent access via backdoors
• Sophisticated payload delivery mechanisms

MITRE ATT&CK Tactics

ATT&CK Techniques

Software / Tooling

Campaigns & Victims

Red Nue's campaigns, such as the 2019 attack on a Chinese news website, demonstrate their ability to identify and exploit vulnerabilities in targeted ecosystems. They exhibit patience and strategic planning in compromising high-value targets, indicating a focus on long-term goals rather than quick gains.

IOC Patterns

• Multi-platform backdoor deployments
• Watering hole attacks via compromised websites
• Command and Control (C2) communication channels

Recommended Actions

• Monitor network traffic for signs of multi-stage attacks
• Implement strict access controls to critical systems
• Use endpoint detection solutions to identify known malware signatures
• Educate users on phishing and malicious document risks
• Regularly update software to patch vulnerabilities

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