Tor

WhiteLock is a Windows ransomware that encrypts user files using AES-CBC symmetric encryption with RSA-2048 asymmetric key protection, appending the .Fbin extension to encrypted files. It identifies infected devices via SHA-256 hashed MAC addresses, communicates with external servers for key exchange, and deliberately terminates AnyDesk and TeamViewer services to impede remote incident response. The ransomware has been observed in campaigns where information theft malware is used for initial access prior to ransomware deployment.

The Cloud Atlas APT group has updated its toolset in 2025-2026 campaigns targeting Russia and Belarus, utilizing LNK-based phishing to deploy VBCloud and PowerShower backdoors. The group establishes persistent access by patching termsrv.dll for concurrent RDP sessions and heavily relies on reverse SSH, RevSocks, and Tor for redundant C2 channels. Additionally, a new PowerShell tool named PowerCloud is used to exfiltrate administrator data to Google Sheets.