alert tcp $HOME_NET any -> $EXTERNAL_NET 9090 (msg:"ET MALWARE Win32.Akdoor Reporting MAC Address"; flow:to_server,established; dsize:20; content:"|01 00 00 00 0c 00 00 00|"; fast_pattern; pcre:"/^[0-9A-F]{12}$/R"; reference:md5,f5ba42117dd02f50b12542131dcd8b5f; classtype:trojan-activity; sid:2020081; rev:1; metadata:created_at 2014_12_29, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)