Gunra Ransomware Targets Windows and Linux Systems

Gunra ransomware, active since April 2025, poses a significant threat with its dual-platform capability, targeting both Windows and Linux systems. The Windows variant uses ChaCha8 encryption and secure random number generation, making decryption impractical. In contrast, the Linux variant employs ChaCha20 encryption but suffers from a cryptographic flaw due to weak random number generation, allowing potential file recovery through brute-force attacks. Organizations must develop platform-specific threat intelligence and incident response strategies to mitigate risks effectively.

Latest mentioned: 10-29

Earliest mentioned: 10-29

Sources

gbhackers.com securityonline.info cybersum.net

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PolarEdge ORB Network Unveiled: 25,000 IoT Devices Compromised

XLab has discovered RPX_Client, a new module in the PolarEdge ORB network, which hijacks IoT devices for global proxy operations. The malware, distributed via IP address 111.119.223.196, onboards infected devices into the PolarEdge proxy pool, providing relay services and executing remote commands. Over 25,000 devices have been compromised, primarily network video recorders and routers. The command-and-control infrastructure includes 140 active RPX_Server nodes, using a PolarSSL test certificate and listening on port 55555. The RPX_Client module functions as a relay agent, disguising its process name and maintaining configuration data encrypted via XOR. The malware maintains two persistent C2 channels for registration, proxy services, and remote command execution.

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