alert http $HOME_NET any -> any any (msg:"ET EXPLOIT Sophos Firewall Authentication Bypass (CVE-2022-1040) Server Response M1"; flow:established,to_client; flowbits:isset,ET.SophosAuthBypass; file.data; content:"{|22|status|22 3a 22|Session Expired|22|}"; fast_pattern; reference:cve,2022-1040; reference:url,attackerkb.com/topics/cdXl2NL3cR/cve-2022-1040; classtype:attempted-admin; sid:2036549; rev:3; metadata:created_at 2022_05_09, cve CVE_2022_1040, deployment Perimeter, deployment Internal, deployment SSLDecrypt, confidence High, signature_severity Major, tag CISA_KEV, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_11_26, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)