alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon APT Maldoc Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.user_agent; content:"|3a 3a|"; content:"_"; distance:0; content:"|3a 3a|/."; distance:0; fast_pattern; http.header_names; content:!"Referer"; reference:md5,9f89075a81920a6602f8ed5faccd8854; reference:url,twitter.com/500mk500/status/1529825325609168896; classtype:trojan-activity; sid:2036682; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_05_26, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_26;)