alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Zegost!ml CnC Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/dark/275.htm"; bsize:13; fast_pattern; http.user_agent; content:"|3b 2b|SV1|3b|"; http.header_names; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; startswith; reference:md5,36b81518c59c0ab6c17e4e750be0c85e; classtype:command-and-control; sid:2038778; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_08, deployment Perimeter, malware_family Win32_Zegost_ml, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_08, reviewed_at 2024_12_24;)