alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK 2013-3918"; flow:established,to_client; http.header_names; content:"|0d 0a|X-Powered-By|0d 0a|"; file.data; content:"C|3a 5c|Rock.png"; nocase; fast_pattern; content:"|7b|return"; pcre:"/^\s*?[A-Z0-9a-z\+]+?\s*?\x7d/R"; content:"|7d|function"; content:"|3b|function"; classtype:exploit-kit; sid:2019226; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2014_09_24, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2024_03_03;)