alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Executable Requested from Evernote Link M3 (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"uZXhl"; http.host; content:"t.mail-svc.evernote.com"; bsize:23; fast_pattern; http.header_names; content:!"Referer"; classtype:bad-unknown; sid:2046750; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_07_07, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_07_07; target:src_ip;)