alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Trojan.APT.9002 POST"; flow:established,to_server; http.method; content:"POST"; http.uri; pcre:"/^\/[a-f0-9]+$/"; http.user_agent; content:"lynx"; depth:4; isdataat:!1,relative; fast_pattern; http.header_names; content:!"Referer|0d 0a|"; reference:url,www.fireeye.com/blog/technical/cyber-exploits/2013/11/operation-ephemeral-hydra-ie-zero-day-linked-to-deputydog-uses-diskless-method.html; classtype:targeted-activity; sid:2017702; rev:4; metadata:created_at 2013_11_11, confidence Medium, signature_severity Major, updated_at 2020_12_10;)