alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE ArcDoor User-Agent (ALIZER)"; flow:established,to_server; http.user_agent; content:"ALIZER"; bsize:6; reference:md5,71bae4762a6d2c446584f1ae991a8fbe; classtype:trojan-activity; sid:2020344; rev:3; metadata:created_at 2015_02_03, confidence High, signature_severity Major, updated_at 2020_05_15;)