alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.YordanyanActiveAgent CnC Reporting"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"client?mac_address="; content:"&agent_id="; distance:0; content:"agent_file_version"; http.user_agent; content:"cpprestsdk/"; fast_pattern; http.header_names; content:!"Referer"; content:!"Accept"; reference:md5,d71d1ad067c3d4dc9ca74cca76bc9139; classtype:command-and-control; sid:2026435; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_10_04, deployment Perimeter, malware_family ActiveAgent, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_04;)