alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET USER_AGENTS Suspicious user agent (asd)"; flow:to_server,established; http.method; content:"GET"; http.user_agent; content:"asd"; nocase; depth:3; endswith; classtype:trojan-activity; sid:2012762; rev:4; metadata:created_at 2011_05_03, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_13;)