alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE JS/Agent.NZH CnC Response"; flow:established,to_client; http.stat_code; content:"200"; file.data; content:"File not found.|0a 3c 21 2d 2d|"; within:30; fast_pattern; content:"-->"; distance:0; classtype:command-and-control; sid:2026987; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_02_27, deployment Perimeter, deprecation_reason Age, malware_family JS_Agent_NZH, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2023_12_19, reviewed_at 2023_12_19;)