alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Gamaredon Related Activity (GET)"; flow:established,to_server; urilen:>30; http.method; content:"GET"; http.uri; content:"/USER-"; fast_pattern; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,7866fd386ebcadd51966f3ed2092c101; reference:url,twitter.com/StopMalvertisin/status/1624040846785134592; classtype:trojan-activity; sid:2044166; rev:2; metadata:attack_target Client_Endpoint, created_at 2023_02_10, deployment Perimeter, malware_family Gamaredon, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_26; target:src_ip;)