alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Trojan.FakeMS Checkin"; flow:established,to_server; urilen:5; http.method; content:"POST"; http.header; content:!"Referer"; http.request_body; content:"|20|(64|20|=|20|"; content:")|20|EXE|20|=|20|"; distance:1; within:8; pcre:"/^\x5b[^\r\n]+\(64\s=\s\d\)\sEXE\s=/"; reference:md5,e606e56a222f788ab5cbcf40842cbc39; reference:md5,099dc535bdd09d6a7bc4edabc8ded5de; classtype:command-and-control; sid:2019654; rev:7; metadata:created_at 2014_11_06, signature_severity Major, updated_at 2020_05_13;)