alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.YordanyanActiveAgent Generic CnC Pattern"; flow:established,to_server; http.uri; content:"/rest/v"; content:"/clients/client?"; distance:0; content:"&agent_id="; distance:0; fast_pattern; http.user_agent; content:!"Mozilla"; http.header_names; content:!"Referer"; content:!"Accept"; reference:md5,d71d1ad067c3d4dc9ca74cca76bc9139; classtype:command-and-control; sid:2026436; rev:3; 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 Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_02;)