alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Blackhole Exploit Kit Request tkr"; flow:established,to_server; content:".php?"; http_uri; content:"src="; http_uri; distance:0; content:"&gpr="; http_uri; distance:0; content:"&tkr="; http_uri; distance:0; pcre:"/[\?&]src=\d+&gpr=\d+&tkr[ib]?=[a-f0-9]+/U"; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2013363; rev:5; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2011_08_05, deployment Perimeter, malware_family Blackhole, signature_severity Critical, tag Blackhole, tag Exploit_Kit, updated_at 2021_06_23;)