kazu is a financially motivated ransomware and data extortion group that emerged around mid-2025, notably targeting government agencies and healthcare providers. They utilize sophisticated tactics for initial access and data exfiltration, employing a double-extortion model to coerce victims into paying ransoms.
Key insights
•Targets include government agencies, public-sector institutions, and healthcare providers.
•Initial access is typically gained through exploiting RDP services and unpatched web applications.
•The group uses SmokeLoader as the initial loader to deliver ransomware payloads.
•Employs a double-extortion tactic, exfiltrating data before encrypting files.
•Ransom demands range from $60,000 to $500,000, with threats to publish stolen data.