alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED BlackHole EK Non-standard base64 Key"; flow:established,from_server; file_data; content:"keyStr = |22|"; content:!"|22|"; within:65; content:"|22|"; distance:65; within:1; content:!"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; distance:-66; within:62; content:!"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; distance:-66; within:62; content:!"abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; distance:-66; within:62; content:!"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; distance:-66; within:62; content:!"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz"; distance:-66; within:62; content:!"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; distance:-66; within:62; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2017164; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_07_19, deployment Perimeter, malware_family Blackhole, signature_severity Critical, tag Blackhole, tag Exploit_Kit, updated_at 2019_07_26;)