alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK Landing Jan 27 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|"; fast_pattern; distance:15; within:16; pcre:"/^[A-Za-z]{3,5}/R"; content:"|22| style=|22|display|3a|none|22|>"; within:23; pcre:"/^[a-zA-Z0-9]{9}<\/[^>]+>\s+?<[^\s]+\sid=\x22[a-zA-Z]{3,5}\x22\sstyle=\x22display\x3anone\x22>[A-Za-z0-9]{500}/Rs"; classtype:exploit-kit; sid:2020319; rev:4; 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;)