alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Nuclear EK Landing Jan 19 2014"; flow:established,from_server; file_data; content:"|73 74 61 72 74 7C 7C 30|"; nocase; fast_pattern; content:"|24 2c|"; pcre:"/^\s*?\x73\x74\x61\x72\x74\s*?\x29\s*?\x7b\s*?for\s*?\x28\s*?var\s+?[^\s]+?\s*?=\s*?\x73\x74\x61\x72\x74\x7C\x7C\x30\s*\x2c/Rsi"; content:"|22 6c|"; distance:0; pcre:"/^[^a-z]?\x65[^a-z]?\x6e[^a-z]?\x67[^a-z]?\x74[^a-z]?\x68/Ri"; classtype:exploit-kit; sid:2020207; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_01_19, deployment Perimeter, malware_family Nuclear, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2019_10_08;)