alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SCAN ZmEu Scanner User-Agent Inbound"; flow:established,to_server; http.user_agent; bsize:4; content:"ZmEu"; classtype:trojan-activity; sid:2012936; rev:5; metadata:created_at 2011_06_07, confidence High, signature_severity Major, updated_at 2024_03_10;)