alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK Landing Jan 27 2015 M1"; flow:established,to_client; http.server; content:"nginx"; startswith; http.header_names; content:"|0d 0a|X-Powered-By|0d 0a|"; file.data; content:"|5b 2f 2a|"; fast_pattern; pcre:"/^[a-z]{7}(?:\s*?[a-z]+\s*?)*?[a-z]{7,}\x2a\x2f[a-zA-Z]{3,5}\W/Rs"; content:"|2f 2a|"; distance:0; pcre:"/^[a-z]{7}(?:\s*?[a-z]+\s*?)*?[a-z]{7,}\x2a\x2f/Rs"; content:"|2f 2a|"; distance:0; pcre:"/^[a-z]{7}(?:\s*?[a-z]+\s*?)*?[a-z]{7,}\x2a\x2f/Rs"; classtype:exploit-kit; sid:2020318; rev:9; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2015_01_28, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2024_02_23;)