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This will explain the "uses" of IPC for hackers. Inter-Process Communication
is used for data sharing between applications and computers. We
will be looking at Windows NT default IPC$ share use for communication
between computers. This share is what we use to start to gain access
to the server. What we will look at before we start is the NET commands
for the console in NT. (Note I was unable to create a null connection
using a 95/98 computer I had to use an NT computer) The net commands
that we will be using are net use and net view. Now get in to the
console (fake ms-dos) in windows. Pick out your target and make
sure that it is an NT system and it has port 139 open. You need
port 139 open so that net-bios is on. After checking for that you
go to the console and type:
Example 1> C:\>NET USE \\TARGET\IPC$ * /USER:
Example 2> C:\>NET USE \\TARGET\IPC$ * /USER:""
Example 3> C:\>NET USE \\TARGET\IPC$ "" /USER:""
- Note: For some reason the command varies a little bit from NT
to NT
- Note: TARGET is the name or IP of the computer, ex. \\211.3.4.11\ipc$
* /user:
- Note: If it works youll get> The command completed successfully.
- Note: To check the connection type NET USE \\TARGET\IPC$
After starting a null connection you could try to access the hidden
shares. The default hidden shares are: C$, PRINT$, ADMIN$, IPC$.
As you can probably tell shares are hidden by putting a $ at the
end of the share name. Sometime shares don't have passwords so you
can use them. When you create a null connection you have the least
possible rights. Next you could try using net view. To do this open
the console and type:
Example:
C:\>net view \\TARGET (Shares)
Or
C:\>net view /workgroup:TARGETWG (Computers in workgroup)
Or
C:\>net view /domain:TARGETD (Computers in domain)
(Note: change TARGETWG to the name of the workgroup to see all
of the computers connected)
(Note: change TARGET to the IP or name of the computer to see all
none hidden shares)
(Note: change TARGETD to domain name example: /domain: Bob.com )
If you can't find an open share you could use a program that I like
a lot called winfo. Winfo will get all of the user names from the
target. Or another programs that is Nat(NetBIOS Auditing Tool).
Nat will try names and passwords (dictionary attack) to get the
right one. Another well like program is sid2user and user2sid.
Last but not least there are DoS attacks that could be preformed.
Dos attacks become outdated quickly but new ones are always poping
up. A good Dos attack that works on NT systems with printer capibiltes.
It kinda goes like this (null connection is needed): \\target\pipe\spoolss.
Do this alot. The next one is one that im not sure that works but
you fill all the connections possible on: \\target\pipe\samr. For
that I would recomend use a program like ubend.exe.
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