alert tcp $EXTERNAL_NET any -> $HOME_NET 445 (msg:"GPL NETBIOS SMB-DS Session Setup AndX request username overflow attempt"; flow:to_server,established; content:"|00|"; depth:1; byte_test:2,>,322,2; content:"|FF|SMBs"; depth:5; offset:4; nocase; byte_test:1,<,128,6,relative; content:"|00 00 00 00|"; within:4; distance:42; byte_test:2,>,255,8,relative,little; content:!"|00|"; within:255; distance:10; reference:bugtraq,9752; reference:url,www.eeye.com/html/Research/Advisories/AD20040226.html; classtype:attempted-admin; sid:2102402; rev:6; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)