alert http any any -> [$HOME_NET,$SMTP_SERVERS] any (msg:"ET MALWARE JS SpyPress Dropped Webshell Inbound Request (list.js.php)"; flow:established,to_server; http.uri; content:"/list.js.php?c="; fast_pattern; http.method; content:"GET"; reference:url,www.proofpoint.com/us/blog/threat-insight/ta458-roundpress-exploits; classtype:web-application-attack; sid:2071254; rev:1; metadata:attack_target Server, created_at 2026_07_21, deployment Perimeter, malware_family SpyPress, confidence High, signature_severity Major, tag WebShell, updated_at 2026_07_21, mitre_tactic_id TA0003, mitre_tactic_name Persistence, mitre_technique_id T1505, mitre_technique_name Server_Software_Component; target:dest_ip;)