In a grim alert for Gmail and Outlook users, FBI and CISA warn about Medusa ransomware. Medusa began in 2021. It endangers personal and work data worldwide.
The Medusa Ransomware: How It Operates
Medusa works in two steps. First, it locks files so users cannot reach them. Then, it warns that it holds stolen data and may share it unless a payment is made.
Hackers send tricky emails to fool users. They also exploit software that lacks recent fixes. Once they break in, they lock files. This action stops systems from working until demands are met.
By February 2025, Medusa had attacked more than 300 groups. It hit sectors such as health, schools, law, tech, insurance, and factories. These attacks touch many parts of society.
Key Recommendations for Users
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Improve Account Safety:
- Make long and unique passwords for each account.
- Turn on extra checks (multifactor) on email and key systems.
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Set Up Backup and Restore Plans:
- Keep safe copies of important data in different spots like external drives or online stores.
- Test backups often to check that they work and stay secure.
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Keep Systems Current:
- Update operating systems, software, and firmware often.
- Focus on updates for systems that can be reached from the internet.
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Boost Network Safety:
- Divide your network into parts to stop attackers from moving widely.
- Check network traffic to spot odd moves and block unwanted access.
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Limit High-Priority Access:
- Review who can do what and cut off access that is not needed.
- Turn off extra command tools and scripts to keep risks low.
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Use Solid Security Checks:
- Shut unused ports and watch for scanning from unknown sources.
- Use tools that check end devices and log any odd network patterns.
Government Advisory and Next Steps
On March 12, 2025, FBI and CISA released advisory AA25-071A. This report outlines how Medusa works and how to guard against it. Organizations should check CISA’s guidelines to improve their defenses.
Cyber threats grow fast. Users of Gmail, Outlook, or any email service must take these warnings to heart. Keeping safe habits now can protect your data from Medusa ransomware.