alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET EXPLOIT_KIT DRIVEBY Nuclear EK Payload (flowbits set)"; flow:established,to_server; flowbits:set,et.Nuclear.Payload; flowbits:noalert; urilen:>32; http.uri; content:"/ABs"; fast_pattern; startswith; pcre:"/^\/ABs[A-Za-z0-9_]+(?:\/x?[a-f0-9]+(?:\x3b\d+)+)?$/"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; classtype:exploit-kit; sid:2019872; rev:7; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Any, attack_target Client_Endpoint, created_at 2014_12_03, deployment Perimeter, malware_family Nuclear, confidence High, signature_severity Critical, tag DriveBy, tag Exploit_Kit, tag Nuclear, updated_at 2024_05_01;)