alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE x0Proto Download Cmd"; flow:established,from_server; flowbits:isset,et.x0proto; content:"x74|0c|1|0c|1x"; depth:8; classtype:trojan-activity; sid:2012240; rev:2; metadata:created_at 2011_01_27, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)