alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE BIOPASS RAT Go Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/res/"; startswith; fast_pattern; content:".exe"; endswith; http.user_agent; content:"Go-http-client/"; startswith; http.host; content:"flashdownloadserver.oss-cn-hongkong.aliyuncs.com"; reference:md5,f0b96efe2f714e7bddf76cc90a8b8c88; reference:url,trendmicro.com/en_us/research/21/g/biopass-rat-new-malware-sniffs-victims-via-live-streaming.html; classtype:trojan-activity; sid:2033310; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_09, deployment Perimeter, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_09;)