alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Troj/ReRol.A Checkin 2"; flow:established,to_server; urilen:7; http.method; content:"POST"; http.uri; content:"/dr.asp"; fast_pattern; http.user_agent; content:"Mozilla/4.0|20 28|compatible|3b|)"; bsize:25; http.header_names; content:"Content-Length|0d 0a|"; content:"User-Agent|0d 0a|"; distance:0; content:!"Referer|0d 0a|"; reference:url,blog.cassidiancybersecurity.com/post/2014/07/The-Eye-of-the-Tiger2; reference:md5,c0656b66b9f4180e59e1fd2f9f1a85f2; classtype:command-and-control; sid:2018883; rev:5; metadata:created_at 2014_07_14, signature_severity Major, updated_at 2020_09_25;)