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:".emf?=CreateObject"; fast_pattern; nocase; endswith; http.user_agent; content:"mozilla/5.0"; nocase; content:"|3a 3a|"; distance:0; content:"|3a 3a 2f 2e|"; distance:0; http.header_names; content:!"Referer"; reference:url,unit42.paloaltonetworks.com/trident-ursa/; classtype:trojan-activity; sid:2042975; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_12_20, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_20; target:src_ip;)