CISA: Medusa Ransomware Hit Over 500 Critical Infrastructure Orgs

CISA says the Medusa ransomware operation has breached more than 500 U.S. critical infrastructure organizations since 2021, up from more than 300 reported last year. The group has targeted healthcare, government, defense, manufacturing, IT and financial organizations, evolving into a ransomware-as-a-service operation that recruits initial-access brokers and uses stolen data to pressure victims into paying. BleepingComputer reports: The three federal agencies recommended that network defenders secure their networks against the ransomware group’s attacks by mitigating security vulnerabilities to protect operating systems, software, and firmware from exploitation attempts. Security teams are also advised to segment networks to block lateral movement after compromise and to block access from untrusted origins to remote services on internal systems.

[…] “Medusa developers typically recruit initial access brokers (IABs) in cybercriminal forums and marketplaces to obtain initial access to potential victims,” the advisory says. “Potential payments between $100 USD and $1 million USD are offered to these affiliates with the opportunity to work exclusively for Medusa.”

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