alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Keylogger Pro Update Check"; flow:established,to_server; http.method; content:"POST"; nocase; http.request_body; content:"<root><clnt>"; content:"</clnt><code>CheckUpdate</code>"; nocase; fast_pattern; pcre:"/<root><clnt>\d{8}-\d{4}-\d{4}-\d{4}-[0-9A-F]{12}</clnt><code>CheckUpdate</code>/"; reference:url,vil.nai.com/vil/content/v_130975.htm; classtype:trojan-activity; sid:2009533; rev:9; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_13;)