alert http $EXTERNAL_NET any -> $HOME_NET any (
msg:"ET EXPLOIT_KIT Spelevo EK Landing M2";
flow:from_server,established;
file_data;
content:"|516248566e615735455a58526c5933|";
content:"-=8))%256)|3b|}";
content:"+=72){";
content:"[0] < 21) return false|3b|";
content:",[0] > 31) return false|3b|"; distance:0;
content:"[0] == 31 &&";
content:"[3] > 153) return false|3b|"; distance:0;
content:"flash"; nocase;
classtype:exploit-kit;
sid:2027073; rev:1;
metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_03_11, deployment Perimeter, malware_family Spleevo_EK, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_07_26;
)