alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT Possible Nuclear EK Nov 13 2015 Landing URI struct"; flow:established,to_server; flowbits:set,NuclearEK; urilen:>25; http.uri; content:"_id="; fast_pattern; http.host; pcre:"/^[a-z0-9]+\.(?:g[aq]|cf|ml|tk|xyz|info|space)(?:\x3a\d{1,5})?$/"; http.header_names; to_lowercase; content:!"|0d 0a|cookie|0d 0a|"; classtype:exploit-kit; sid:2022090; rev:7; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2015_11_13, deployment Perimeter, malware_family Nuclear, confidence Medium, signature_severity Critical, tag Exploit_Kit, tag Nuclear, updated_at 2024_04_29;)