Windows NT Auditing
To determine from which system a user logged on with Windows NT Auditing,perform the following steps:
- Start User Manager for Domains.
- Click Audit from the Policies menu.
- Click to enable Success for the Logon and Logoff category. Optionally, you may also select the Failure check box.
After the above procedure has been implemented, Windows NT will create anevent log for each successful log on attempt. The log will appear like theexample below:
Date: 10/13/97 Event ID: 528 Time: 10:32:11 AM Source: Security User: JoeSmith Type: Success Audit Computer: MKTINGDOM Category: Logon/Logoff Description: Logon/Logoff: Successful Logon User Name: JoeSmith Domain: MKTINGDOM Logon ID: (0x0, 0x2D0D0) Logon Type: 3 Logon Process: User32 Authentication Pkg: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0 Workstation Name: \\WKS2
To determine from which system a user logged on with Network Monitor,perform the following steps:
- Capture all incoming traffic to the domain controller(s). In order to reduce the size of the captured data:
- If possible, include only the Primary or Backup Domain Controller that is most likely to validate the intruder.
- Set a capture filter, including only the server message block (SMB) protocol.
- Configure a large enough memory buffer through the Buffer Settings option in the Capture menu.
- After the data has been captured, set a display filter to only include:
Property: Account Name
This will display all the initial SMB session setup containing the username and the source media access control address.
Src Mac Addr: Dst Mac Addr: DescriptionWKS1 SUNKING C session setup & X, Username = MariaH, and Ctree connect & X, Share = \\SUNKING\IPC$WKS2 SUNKING C session setup & X, Username = JoeSmith, and Ctree connect & X, Share = \\SUNKING\IPC$WKS3 SUNKING C session setup & X, Username = Administrator,and C tree connect & X, Share = \\SUNKING\IPC$
In the example above, WKS1 is the computer where the user is logging onfrom, SUNKING is the domain controller authenticating the request, and theDescription contains the Windows NT domain account being used.
NOTE: The Src Mac Addr may also been shown as a media access control or IPaddress if the NetBIOS name could not be resolved or the entry is not inthe Network Monitor address database.
Using the WINS Database
To determine from which system a user logged on using the WINS database,perform the following steps:
- Start WINS Manager.
- Click Show Database on the Mappings menu.
- Click Set Filter, type the user account name in the Computer Name criteria, and then click OK.
- In the Mappings list, the entry with the user account name and the 03h identifier maps to the IP address of the workstation from which the user logged on to the domain.
Using the NetBIOS Remote Name Table
To determine from which system a user logged on using the NetBIOS RemoteName Table, perform the following steps:
- From an MS-DOS command prompt, type the following, and then press Enter.
net send <user name> "text message"
where <user name> is the user account for the user you are attempting to locate.
- Type the following, and then press Enter.
- As in the example above using the WINS Database, locate the user name that is associated with the 03h identifier and the corresponding IP address is that of the workstation.
For more information, please refer to the following Microsoft KnowledgeBase articles:
TITLE : How to Activate Security Event Logging in Windows NT 4.0
TITLE : How to Identify User Who Changed Administrator Password
TITLE : Distinguishing Windows NT Audit Event Records