Rule History

alert tcp $EXTERNAL_NET any -> $HOME_NET 445 (msg:"GPL NETBIOS SMB-DS NT Trans NT CREATE unicode andx invalid SACL ace size dos attempt"; flow:stateless; content:"|00|"; depth:1; content:"|FF|SMB"; within:4; distance:3; pcre:"/^(\x75|\x2d|\x2f|\x73|\xa2|\x2e|\x24|\x74)/sR"; byte_test:1,&,128,6,relative; content:"|A0|"; depth:1; offset:39; byte_jump:2,0,little,relative; content:"|01 00|"; within:2; distance:37; byte_jump:4,-7,little,relative,from_beginning; content:!"|00 00 00 00|"; within:4; distance:20; byte_jump:4,20,relative,little; content:"|00 00|"; within:2; distance:-10; classtype:protocol-command-decode; sid:2103057; rev:4; metadata:created_at 2010_09_23, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)