alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32.Cerberus RAT Client pong"; flow:from_client,established; content:"wZ2pla"; depth:6; reference:md5,76e084e9420bfaa31c0f0bf000f1c301; classtype:trojan-activity; sid:2013773; rev:2; metadata:created_at 2011_10_14, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)