alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE PlugX/Destory HTTP traffic"; flow:established,to_server; http.request_line; content:"POST|20|"; depth:5; http.header_names; content:"X-Sn"; fast_pattern; content:"X-Session"; content:"X-Status"; content:"X-Size"; reference:url,circl.lu/pub/tr-24/; classtype:trojan-activity; sid:2018541; rev:4; metadata:created_at 2014_06_06, signature_severity Major, updated_at 2020_08_18;)