alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Spelevo EK Flash Exploit Attempt"; flow:established,to_server; urilen:38; http.uri; content:"/?s="; depth:4; fast_pattern; pcre:"/^\/\?s=[a-f0-9]{32}[a-z]{2}$/"; http.header; content:"/?s="; content:"|0d 0a|"; distance:34; within:2; content:"x-flash-version|3a|"; http.referer; pcre:"/^http\:\/\/[^\r\n\x2f]+\/\?s=[a-f0-9]{32}[a-z]{2}$/i"; classtype:exploit-kit; sid:2027145; rev:4; metadata:affected_product Adobe_Flash, attack_target Client_Endpoint, created_at 2019_04_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Spelevo_EK, updated_at 2024_04_18;)