hardbit

HardBit is a ransomware threat actor active since 2022, known for its evolving ransomware family, most recently HardBit 4.0. The group is notable for not operating a public data leak site and focusing solely on encryption-based extortion, without double extortion or data exfiltration. HardBit 4.0 demonstrates significant technical sophistication, employing advanced evasion and persistence techniques, including a multi-stage deployment strategy, use of the Neshta file infector as a dropper, and obfuscation with a modified ConfuserEx protector. Initial access is typically gained via brute-force attacks on exposed RDP and SMB services, often using tools like NLBrute, followed by credential harvesting with Mimikatz and lateral movement. The malware disables Windows Defender protections, stops security and backup services, and removes recovery options to maximize impact. HardBit 4.0 requires attacker-supplied passphrases at runtime, complicating automated analysis and sandboxing. The ransomware is distributed in both CLI and GUI formats, with the GUI version featuring an optional 'Wiper' mode for data destruction. Persistence is achieved through registry modifications and file hiding. The group targets enterprise environments and demonstrates increasing operational flexibility and sophistication. No nation-state affiliation or known aliases are currently attributed to HardBit.