alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Suspicious User Agent UpdateSoft"; flow:established,to_server; http.user_agent; content:"UpdateSoft"; startswith; reference:md5,254efc77c18eb2f427d2a3920e07c2e8; classtype:misc-activity; sid:2014345; rev:5; metadata:attack_target Client_Endpoint, created_at 2012_03_09, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Informational, updated_at 2023_05_16;)