Rule History

alert udp $HOME_NET 137 -> $EXTERNAL_NET any (msg:"ET SCAN NBTStat Query Response to External Destination, Possible Windows Network Enumeration"; content:"|20 43 4b 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 00 00 21|"; depth:55; reference:url,technet.microsoft.com/en-us/library/cc940106.aspx; classtype:attempted-recon; sid:2009768; rev:4; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)