alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Possible AnglerEK Landing URI Struct"; flow:established,to_server; http.uri; content:"?thread="; fast_pattern; nocase; content:"key="; isdataat:!33,relative; nocase; pcre:"/^\/[a-z0-9]+?\?thread=\d+?&x?key=[A-F0-9]{32}$/"; classtype:exploit-kit; sid:2017975; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2014_01_17, deployment Perimeter, malware_family Angler, confidence Medium, signature_severity Critical, tag Angler, tag Exploit_Kit, updated_at 2024_03_18;)