alert http any any -> [$HOME_NET,$HTTP_SERVERS] any (msg:"ET EXPLOIT Sophos Web Appliance RCE Attempt Inbound (CVE-2013-4983)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/index.php?"; content:"c=blocked"; content:"action=continue"; fast_pattern; reference:cve,2013-4983; classtype:web-application-attack; sid:2061768; rev:1; metadata:attack_target Server, created_at 2025_04_21, cve CVE_2013_4983, deployment Perimeter, deployment Internal, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_21, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)