alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon APT Related Activity (GET)"; flow:established,to_server; urilen:>15; http.method; content:"GET"; http.uri; content:".dbx"; endswith; fast_pattern; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.host; pcre:"/\.(?:ru|shop)$/"; http.header_names; content:!"Referer|0d 0a|"; reference:md5,fdad8eac78738c497ee029eb0a9b7d9e; reference:url,twitter.com/Cyber0verload/status/1653098342858063874; classtype:trojan-activity; sid:2045309; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_05_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_03; target:src_ip;)