alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Agent.XST/UP007 Checkin 2"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"this is UP"; startswith; fast_pattern; content:"|00 00 00 00|"; http.content_type; bsize:9; content:"text/html"; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:!"|0d 0a|accept|0d 0a|"; reference:md5,d579d7a42ff140952da57264614c37bc; reference:url,citizenlab.org/2016/04/between-hong-kong-and-burma; classtype:command-and-control; sid:2022749; rev:7; metadata:created_at 2016_04_20, deprecation_reason Duplicate, malware_family Win32_Agent_XST_UP007, signature_severity Major, updated_at 2024_05_04;)