alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Unk.Bot CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?hwid="; fast_pattern; content:"&os="; distance:0; content:"&build="; distance:0; content:"&cpu="; distance:0; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; content:!"|0d 0a|Accept"; content:!"|0d 0a|User-Agent|0d 0a|"; reference:md5,92c3157d76c67668ca815541c6bb3ba8; classtype:command-and-control; sid:2024679; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_08, deployment Perimeter, malware_family Win32_Unk_Bot, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2024_02_29;)