alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon Maldoc Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/intake/"; startswith; fast_pattern; content:".dot"; endswith; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; reference:md5,fa882c526ba36ec4219698ab6e64e699; classtype:trojan-activity; sid:2035267; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_02_22, deployment Perimeter, deprecation_reason Age, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_20, reviewed_at 2023_08_25;)