alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.Zegost CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?client="; startswith; content:"&v="; distance:0; content:"&con=request&rtm="; distance:0; fast_pattern; content:"&apn="; distance:0; content:"&cm="; distance:0; content:"&cu="; distance:0; content:"&cos="; distance:0; content:"&ctc="; distance:0; content:"&cws="; distance:0; content:"&cpn="; distance:0; reference:md5,e92bd6ef4b93409df37e14e08ffc684e; classtype:command-and-control; sid:2037025; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_16, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_16;)