NBName
Encyclopedia
NBName is a computer program
that can be used to carry out denial-of-service attack
s that can disable NetBIOS
services on Windows
machines. It was written by Sir Dystic
of CULT OF THE DEAD COW
(cDc) and released July 29, 2000 at the DEF CON
8 convention in Las Vegas
.
The program decodes and provides the user with all NetBIOS name packets it receives on UDP
port
137. Its many command line options can effectively disable a NetBIOS network and prevent computers from rejoining it. According to Sir Dystic, "NBName can disable entire LANs and prevent machines from rejoining them...nodes on a NetBIOS network infected by the tool will think that their names already are being used by other machines. 'It should be impossible for everyone to figure out what is going on,' he added."
Computer program
A computer program is a sequence of instructions written to perform a specified task with a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute...
that can be used to carry out denial-of-service attack
Denial-of-service attack
A denial-of-service attack or distributed denial-of-service attack is an attempt to make a computer resource unavailable to its intended users...
s that can disable NetBIOS
NetBIOS
NetBIOS is an acronym for Network Basic Input/Output System. It provides services related to the session layer of the OSI model allowing applications on separate computers to communicate over a local area network. As strictly an API, NetBIOS is not a networking protocol...
services on Windows
Microsoft Windows
Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...
machines. It was written by Sir Dystic
Sir Dystic
Josh Buchbinder,better known as Sir Dystic, has been a member of CULT OF THE DEAD COW since May 1997,and is the author of Back Orifice.He has also written several other hacker tools, including SMBRelay, NetE, and NBName....
of CULT OF THE DEAD COW
Cult of the Dead Cow
Cult of the Dead Cow, also known as cDc or cDc Communications, is a computer hacker and DIY media organization founded in 1984 in Lubbock, Texas. The group maintains a weblog on its site, also titled "Cult of the Dead Cow"...
(cDc) and released July 29, 2000 at the DEF CON
DEF CON
DEF CON is one of the world's largest annual computer hacker conventions, held every year in Las Vegas, Nevada...
8 convention in Las Vegas
Las Vegas metropolitan area
The Las Vegas Valley is the heart of the Las Vegas-Paradise, NV MSA also known as the Las Vegas–Paradise–Henderson MSA which includes all of Clark County, Nevada, and is a metropolitan area in the southern part of the U.S. state of Nevada. The Valley is defined by the Las Vegas Valley landform, a ...
.
The program decodes and provides the user with all NetBIOS name packets it receives on UDP
User Datagram Protocol
The User Datagram Protocol is one of the core members of the Internet Protocol Suite, the set of network protocols used for the Internet. With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol network without requiring...
port
TCP and UDP port
In computer networking, a port is an application-specific or process-specific software construct serving as a communications endpoint in a computer's host operating system. A port is associated with an IP address of the host, as well as the type of protocol used for communication...
137. Its many command line options can effectively disable a NetBIOS network and prevent computers from rejoining it. According to Sir Dystic, "NBName can disable entire LANs and prevent machines from rejoining them...nodes on a NetBIOS network infected by the tool will think that their names already are being used by other machines. 'It should be impossible for everyone to figure out what is going on,' he added."