alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Blackhole Exploit Pack HCP exploit"; flow:established,to_server; content:"/pch.php?f="; http_uri; pcre:"/pch\.php\?f=\d+$/U"; flowbits:set,et.exploitkitlanding; classtype:bad-unknown; sid:2013548; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2011_09_08, deployment Perimeter, malware_family Blackhole, signature_severity Critical, tag Blackhole, tag Exploit_Kit, updated_at 2019_07_26;)