The FBI and the U.S. Cybersecurity and Infrastructure Security Agency are warning against a dangerous ransomware scheme called Medusa. It has recently affected hundreds of people. Medusa uses phishing campaigns as its main method for stealing victims’ credentials, according to CISA. Medusa developers and affiliates use a double extortion model, where they “encrypt victim data and threaten to publicly release exfiltrated data if a ransom is not paid,” the advisory said.

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