alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon APT Related Maldoc Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".mot"; endswith; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; http.user_agent; content:!"@"; startswith; reference:md5,fef34c28f4e73d1c8d60dde708819b1a; reference:url,github.com/pan-unit42/iocs/blob/master/Gamaredon/Gamaredon_IoCs_DEC2022.txt; reference:url,unit42.paloaltonetworks.com/trident-ursa/; classtype:trojan-activity; sid:2042977; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_12_21, deployment Perimeter, malware_family Gamaredon, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_26, reviewed_at 2023_09_01; target:src_ip;)