alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Windows Command Prompt OUTBOUND"; flow:established,to_server; content:"Microsoft Windows"; content:"[Version|20|"; distance:0; pcre:"/^\d\.\d\.\d{4}\]\r\n\(C\)\x20Copyright\x20\d{4}(\x2d\d{4})?\x20Microsoft Corp(:?\.|oration)/Ri"; content:"|0d 0a 0d 0a|C|3a 5c 3e|"; fast_pattern; distance:0; isdataat:!2,relative; classtype:trojan-activity; sid:2018885; rev:2; metadata:created_at 2014_08_04, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)