The Green Blood Group is a ransomware operation that emerged in early 2026, known for its focus on financially motivated extortion using advanced techniques. They employ a double-extortion model that involves encrypting files and threatening to leak sensitive data, all while aggressively disrupting system recovery mechanisms.
Key insights
•Uses a Golang-based ransomware payload with AES-256-CTR or ChaCha8 encryption.
•Employs double-extortion tactics, pressuring victims through a Tor-based data leak site.
•Disables system recovery options and security features to complicate recovery efforts.
•Initial access often gained through malicious executables and phishing emails.
•Files are encrypted with the .tgbg extension, and a ransom note is provided post-encryption.