RE: penetration test in a Windows 2000/NT network

["Romes, Randall J." <Rromes () larsonallen com>]

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Try searching for SQL servers with SA accounts that have no password.  By
accessing these you can use the extended stored procedures to create local
user accounts and add them to the local administrator's group.  Then map a
drive and dump what ever you want from the box-->sensitive files, the SAM...
Nessus will find these, or eEye has a tool called Retina-SQL worm scanner
that will find these accounts.

Depending on the size of the network and the number of "servers" you can
usually find a box with local account passwords that are applicable to
domain accounts (Domain administrators...).

You can also use NBTEnum to query Windows boxes for:
- -  user accounts
- -  groups and group memberships
- -  shares
- -  lockout policy
- -->the tool can also be used to check all accounts for passwords that are
<null> or the same as the user id.

Again, you can usually find boxes these weak passwords.

Randy Romes, CISSP, MCP
Larson Allen Information Security Services Group
http://www.larsonallen.com/technology/index.asp
rromes () larsonallen com
612.397.3114


- -----Original Message-----
From: Ballowe, Charles [mailto:CBallowe () usg com]
Sent: Wednesday, May 14, 2003 4:11 PM
To: 'heron heron'; pen-test () securityfocus com
Subject: RE: penetration test in a Windows 2000/NT network


This sounds like a test from within the company. As it seems that
you will have physical access to facilities etc, would it be possible
for you to install something like a hardware key logger on a network
administrators workstation?

If someone has physical access to the LAN, I don't see why they couldn't
place devices on peoples systems. It may violate the rules for this 
particular pen-test, but is something to think about. I see that you've 
specified that physical access to Win2k systems is possible, and are
interested in not modifying the administrator account -- hardware keyloggers
seem like an ideal solution.

What about wireless sniffers? Does the target use any wireless networking
at their facility?

> -----Original Message-----
> From: heron heron [mailto:h.heron () firemail de]
> Sent: Wednesday, May 14, 2003 8:30 AM
> To: pen-test () securityfocus com
> Subject: penetration test in a Windows 2000/NT network
>
>
> Hi, 
>
> I will accomplish a penetration test in a Windows 2000/NT 
> network shortly. A
> goal is to get  confidential information (files) and if 
> possible get admin
> rights. I will be with my computers in the LAN. A computer 
> for normal uses (thus
> no Admin access) is likewise put to me at the disposal. 
>
> Is there a possibility on a Windows 2000 computers (physical 
> access is possible)
> to attain admin rights without to overwrite the admin 
> account. Background: I
> would like try to crack the password of the local admin (e.g. 
> by means of pwdump
> and John). There ist the possibility that all admin passwords 
> (also for the
> domain) is alike. 
>
> Is there a tool, with which I can crack NTLMv2 hashes. 
> Background: I will try to
> sniff hashes during the registration at the DC (e.g. CAIN, 
> ettercap) and to
> crack them. Unfortunately me is still no tool known in order 
> to crack NTLMv2
> hashes. 
>
> A further possibility at to come to information, would be the 
> employment of a
> SMB Proxy. By ARP Spoofing it would be nevertheless 
> theoretically possible to
> intercept the LM/NTLM(v1/v2) authentication . Then the 
> attacker could itself
> instead announce at the server. Does it give there already 
> such a Tool? 
>
> Who has suggestions? For Tools please give always in the Web 
> URL (if possible of
> the programmer). 
>
> Greeting
> Heron
>
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