alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Angler EK Exploit URI Struct May 28 2015 M1"; flow:to_server,established; urilen:>51; content:"."; http_uri; offset:49; depth:1; content:!"/"; http_uri; offset:1; pcre:"/^\/(?=[a-z0-9_-]{0,47}?[A-Z][a-z0-9_-]{0,46}?[A-Z])(?=[A-Z0-9_-]{0,47}?[a-z][A-Z0-9_-]{0,46}?[a-z])(?=[A-Za-z_-]{0,47}?[0-9][A-Za-z_-]{0,46}?[0-9])[A-Za-z0-9_-]{48}\.[a-z]{2,25}\d?\??/U"; pcre:"/^Referer\x3a\x20http\x3a\x2f\x2f?[^\x2f]+\/[a-z]{3,20}((?P<sep>[_-]?)[a-z]{3,20}(?P=sep)(?:[a-z]{3,20}(?P=sep))?)?[a-z]{3,20}\/\d{10,20}(?:\x3a\d{1,5})?\r$/Hm"; flowbits:set,AnglerEK.Struct; classtype:exploit-kit; sid:2021157; rev:9; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_05_28, deployment Perimeter, malware_family Angler, signature_severity Critical, tag Angler, tag Exploit_Kit, updated_at 2019_07_26;)