The EtherRAT malware family was first reported by Sysdig back in December 2025. At that time, the initial access vector was exploitation of CVE-2025-55182 (React2Shell) targeting Linux servers. In March 2026, a Windows variant campaign was reported by Atos, with their investigation showing evidence of activity going back to the previous December. In April, we The post Flash Alert: EtherRat and TukTuk C2 End in The Gentleman Ransomware appeared first on The DFIR Report.

Key Takeaways We identified an exposed server that provided unusual visibility into a large-scale, multi-victim exploitation and collection operation. Artifacts on the host showed that Claude Code and OpenClaw were embedded in the operator’s day-to-day workflow, supporting troubleshooting, orchestration, and refinement of the collection pipeline. This AI-assisted workflow resulted in the modular platform Bissa scanner The post Bissa Scanner Exposed: AI-Assisted Mass Exploitation and Credential Harvesting appeared first on The DFIR Report.

Key Takeaways An audio version of this report can be found on Spotify, Apple, YouTube, Audible, & Amazon.  This intrusion began in mid-February 2024 after a threat actor exploited a vulnerability (CVE-2023-46604) on an exposed Apache ActiveMQ server. The threat actor was able to perform remote code execution (RCE) by using a Java Spring class and a custom Java Spring The post Apache ActiveMQ Exploit Leads to LockBit Ransomware appeared first on The DFIR Report.