In late June 2026, the Abyssos malware family was identified as a modular RAT implemented in C++. It employs LLVM-based obfuscation methods including control flow flattening and string encryption to hinder detection and analysis. Network communications use a custom TCP protocol secured with AES-GCM encryption. Abyssos supports a wide range of commands for system control, credential theft, file exfiltration, and remote access via VNC. Earlier versions included anti-analysis features detecting hypervisors and security tools, though these are absent in recent versions. The malware is under active development, with multiple versions implementing different obfuscation passes, indicating ongoing enhancement of its capabilities and evasion strategies.

Abyssos enables attackers to remotely control infected systems, steal credentials, exfiltrate files, and access systems via VNC. Its use of strong obfuscation and encrypted communications complicates detection and forensic analysis. The modular design allows deployment of additional malicious modules, increasing its flexibility and potential impact. Although no known exploits in the wild have been reported, the malware's capabilities pose a medium-level threat to affected systems.

No official patches or vendor advisories are available for Abyssos as it is malware rather than a software vulnerability. Mitigation should focus on detection and prevention using updated endpoint protection solutions capable of identifying obfuscated malware and monitoring for suspicious network activity, especially encrypted custom TCP communications. Network defenses should consider blocking known command and control IP addresses associated with Abyssos. Analysts should leverage provided indicators such as IP addresses and file hashes for threat hunting and incident response.