New Yurei Ransomware With PowerShell Commands Encrypts Files With ChaCha20 Algorithm

Emerging in early September 2025, the Yurei ransomware has swiftly drawn attention for its novel combination of Go-based execution and ChaCha20 encryption. First documented on September 5 when a Sri Lankan food manufacturer fell victim, the threat actor behind Yurei adopted a double-extortion model: encrypting files while exfiltrating sensitive data for additional leverage. Within days, […]

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