alert tcp $EXTERNAL_NET any -> $HOME_NET 445 (msg:"GPL NETBIOS SMB-DS DCERPC ISystemActivator unicode bind attempt"; flow:to_server,established; content:"|00|"; depth:1; content:"|FF|SMB%"; depth:5; offset:4; nocase; byte_test:2,&,1,5,relative; content:"&|00|"; within:2; distance:56; content:"|5C 00|P|00|I|00|P|00|E|00 5C 00 05 00 0B|"; within:15; distance:4; byte_test:1,&,16,1,relative; content:"|A0 01 00 00 00 00 00 00 C0 00 00 00 00 00 00|F"; within:16; distance:29; flowbits:set,dce.isystemactivator.bind.call.attempt; reference:bugtraq,8811; reference:cve,2003-0813; reference:nessus,12206; reference:url,www.microsoft.com/technet/security/bulletin/MS04-011.mspx; classtype:protocol-command-decode; sid:2102491; rev:8; metadata:created_at 2010_09_23, cve CVE_2003_0813, confidence Medium, signature_severity Informational, updated_at 2019_07_26;)