Akira Ransomware: MFA-Protected SonicWall VPNs Breached in 2024
In early 2024, the Akira ransomware group escalated its campaign by successfully breaching organizations through SonicWall SSL VPN appliances, even when multi-factor authentication (MFA) was enabled. Security researchers determined that Akira actors appeared to bypass one-time password (OTP) protections, potentially by leveraging previously obtained OTP seed information or exploiting weaknesses in authentication management. Following the VPN compromise, attackers moved laterally, exfiltrated data, and encrypted systems to demand substantial ransom payments. This attack vector enabled access to privileged internal resources, resulting in business disruption, data exposure, and financial losses for affected organizations. The incident underscores how ransomware operators are adapting to bypass commonly deployed defenses, specifically targeting VPN and MFA solutions. Such tactics highlight the urgent need for organizations to reassess remote access controls, authentication infrastructure, and visibility gaps, as similar techniques are increasingly observed in the wild.
Kill Chain