alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED BlackHole EK Variant PDF Download Sep 11 2013"; flow:established,to_server; urilen:>56; content:".php?"; http_uri; fast_pattern:only; pcre:"/\.php\?[^=]+=(?:[^&](?:5[5-9a-e]|8[9a-e])){5}[^=]+=[^&]+&[^=]+=(?:[^&](?:5[5-9a-f]|8[9a-e])){10}([^&]60[^&]60(?:[^&](?:5[5-9a-f]|8[9a-e])){10})*?&/U"; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2017456; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_09_12, deployment Perimeter, malware_family Blackhole, signature_severity Critical, tag Blackhole, tag Exploit_Kit, updated_at 2019_07_26;)