alert tcp $EXTERNAL_NET any -> $HOME_NET 135 (msg:"GPL NETBIOS DCERPC ISystemActivator bind attempt"; flow:to_server,established; content:"|05|"; content:"|0B|"; within:1; distance:1; byte_test:1,&,1,0,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.attempt; flowbits:noalert; reference:bugtraq,8205; reference:cve,2003-0352; reference:nessus,11808; reference:url,www.microsoft.com/technet/security/bulletin/MS03-026.mspx; classtype:protocol-command-decode; sid:2102192; rev:12; metadata:created_at 2010_09_23, confidence High, signature_severity Informational, updated_at 2019_07_26;)