Akira Ransomware Launches Mass Attack on SonicWall VPNs in 2025
In mid-2025, Akira ransomware operators launched a widespread campaign targeting organizations using SonicWall VPN appliances, exploiting a critical vulnerability (CVE-2024-40766) in SonicOS firmware. Attackers achieved initial access through malicious SSL VPN logins, sometimes even bypassing one-time password (OTP) multi-factor authentication controls. Following a successful breach, the attackers conducted rapid port scanning and lateral movement via Impacket SMB activity before deploying Akira ransomware, impacting organizations across various sectors. Despite firmware updates and password resets, compromised credentials persisted, leaving several devices exposed, and the campaign has continued to escalate into late September 2025. This incident illustrates the ongoing evolution and sophistication of ransomware campaigns exploiting network infrastructure vulnerabilities and underscores the urgency of proactive credential management, privileged access monitoring, and swift patch adoption. It exemplifies growing attacks abusing VPNs and MFA, requiring organizations to revisit zero trust and layered defense measures.
Kill Chain