alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Spelevo EK Landing M1"; flow:from_server,established; file_data; content:"|554778315a326c75524756305a574e30|"; 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:2027072; rev:2; 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;)