alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MalDoc/Gamaredon CnC Activity M4"; flow:established,to_server; http.method; content:"OPTIONS"; http.uri; content:"/ADMIN-"; startswith; fast_pattern; http.user_agent; content:"Microsoft Office Protocol Discovery"; reference:md5,b7fe95ccd715a8dd6eb7519ff15e1fc5; reference:url,community.emergingthreats.net/t/signature-maldoc-gamaredon-cnc-admin-prepend/809/2; classtype:trojan-activity; sid:2046949; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_07_27, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_27;)