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Key Findings DragonForce ransomware operators deployed Backdoor.Turn, a custom Go-based remote access trojan that conceals command-and-control traffic within Microsoft Teams relay infrastructure This marks the first publicly documented abuse of Microsoft's TURN relay servers by threat actors Attackers maintained network access for one to two months while evading detection by routing malicious traffic through legitimate Microsoft servers The group employed sophisticated defens

Key Findings Sophos researchers identified a significant uptick in threat actors using QEMU, an open-source emulator, to hide malware in virtual machines and evade detection Two distinct campaigns since late 2025 leverage QEMU for defense evasion: STAC4713 linked to PayoutsKing ransomware and STAC3725 exploiting CitrixBleed2 Attackers use hidden VMs to maintain long-term access, steal credentials and data, deploy ransomware, and leave minimal forensic traces on host systems T