alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Gamaredon Maldoc Remote Template Retrieval (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/PR_KYY/"; fast_pattern; startswith; http.user_agent; content:"|3b 20|ms-office|3b 20|"; http.header_names; content:!"Referer"; reference:url,twitter.com/h2jazi/status/1445115785454788615; reference:md5,00f61bdf5d04a8551b5e15c1f74083c0; reference:md5,ab4ac6236cb487fed4768e1e4d2dd8b6; reference:md5,92b9a1db86b631fc9de68915de446756; classtype:trojan-activity; sid:2034156; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_10_07, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_15;)