alert smb $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Outbound SMB NTLM Auth Attempt to External Address"; flow:established,to_server; content:"|ff|SMB|73|"; content:"NTLMSSP|00 03 00 00 00|"; within:200; fast_pattern; classtype:misc-activity; sid:2044665; rev:3; metadata:attack_target Client_and_Server, created_at 2023_03_16, deployment Perimeter, performance_impact Significant, confidence High, signature_severity Minor, updated_at 2023_09_16, reviewed_at 2023_09_16;)