alert smtp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Outbound SMTP NTLM Authentication Observed"; flow:established,to_server; content:"AUTH|20|ntlm|20|"; depth:10; nocase; fast_pattern; pcre:"/^(?:[A-Z0-9+/]{4})*(?:[A-Z0-9+/]{2}==|[A-Z0-9+/]{3}=|[A-Z0-9+/]{4})$/Ri"; metadata: former_category POLICY; classtype:policy-violation; sid:2027152; rev:1; metadata:attack_target Client_and_Server, deployment Perimeter, signature_severity Minor, created_at 2019_04_03, performance_impact Low, updated_at 2019_04_03;)

Added 2019-04-04 19:10:17 UTC


Topic revision: r1 - 2019-04-04 - TWikiGuest
 
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