alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon APT Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/seized.xml"; endswith; fast_pattern; http.user_agent; content:!"Linux"; content:!"Android"; http.header_names; content:!"Referer|0d 0a|"; http.host; content:".ru"; endswith; reference:md5,d6fe6243a9b4293db6384f22524ff709; reference:url,cert.gov.ua/article/39386; classtype:trojan-activity; sid:2036213; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_04_14, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_16;)