alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Possible Angler EK Flash Exploit Dec 24 2013"; flow:established,to_server; urilen:15; content:"/4"; depth:2; http_uri; pcre:"/^GET \/4(?P<baseuri>[a-z0-9]{10})[a-z0-9]{3} HTTP\/1\.[01]\r\n.*?Referer\x3a http\x3a\/\/[^\/]+?\/(?P=baseuri)\r\n/s"; classtype:exploit-kit; sid:2017901; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_12_25, deployment Perimeter, malware_family Angler, signature_severity Critical, tag Angler, tag Exploit_Kit, updated_at 2019_07_26;)