The FBI has issued a warning about ransomware threats from the Medusa gang targeting Gmail and Outlook users. Medusa employs a double extortion model, encrypting data and threatening to release personal information if the ransom is not paid. Since February, over 300 individuals and organizations across various sectors have been affected by these attacks. The Medusa hackers have demanded ransoms of up to $15 million from organizations, with threats to publish stolen data if the demands are refused.