alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET DELETED BlackHole EK Non-standard base64 Key"; flow:established,from_server; file_data; content:"var "; content:" = |22|"; within:10; 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; content:" & 15) << 4)"; fast_pattern:only; flowbits:set,et.exploitkitlanding; classtype:exploit-kit; sid:2017265; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2013_08_01, deployment Perimeter, malware_family Blackhole, signature_severity Critical, tag Blackhole, tag Exploit_Kit, updated_at 2019_07_26;)