alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK Landing Feb 03 2015 M2"; flow:established,to_client; http.server; content:"nginx"; startswith; http.header_names; content:"|0d 0a|X-Powered-By|0d 0a|"; file.data; content:" id=|22|"; pcre:"/^[A-Za-z]{3,5}/R"; content:"|22| style=|22|visibility|3a|hidden|22| title="; within:34; fast_pattern; pcre:"/^\s*?\x22[a-zA-Z0-9]{7}l[a-zA-Z0-9]\x22\s*?>(?:(?!<\/).){500}/Rs"; classtype:exploit-kit; sid:2020352; rev:6; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2015_02_03, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2024_03_05;)