NtdsAudit is an application to assist in auditing Active Directory databases.
It provides some useful statistics relating to accounts and passwords, as shown in the following example. It can also be used to dump password hashes for later cracking.
Account stats for: domain.local
Disabled users _____________________________________________________ 418 of 5164 (8%)
Expired users ______________________________________________________ 67 of 5164 (1%)
Active users unused in 1 year ______________________________________ 787 of 4679 (17%)
Active users unused in 90 days _____________________________________ 1240 of 4679 (27%)
Active users which do not require a password _______________________ 156 of 4679 (3%)
Active users with non-expiring passwords ___________________________ 3907 of 4679 (84%)
Active users with password unchanged in 1 year _____________________ 1006 of 4679 (22%)
Active users with password unchanged in 90 days ____________________ 1400 of 4679 (30%)
Active users with Administrator rights _____________________________ 63 of 4679 (1%)
Active users with Domain Admin rights ______________________________ 54 of 4679 (1%)
Active users with Enterprise Admin rights __________________________ 0 of 4679 (0%)
Disabled computer accounts _________________________________________ 86 of 1414 (6%)
Password stats for: domain.local
Active users using LM hashing ______________________________________ 40 of 4679 (1%)
Active users with duplicate passwords ______________________________ 2312 of 4679 (49%)
Active users with password stored using reversible encryption ______ 4666 of 4679 (100%)
Usage
NtdsAudit requires version 4.6 or newer of the .NET framework.
Usage: [arguments] [options]
Arguments:
NTDS file The path of the NTDS.dit database to be audited, required.
Options:
-v | --version Show version information
-h | --help Show help information
-s | --system <file> The path of the associated SYSTEM hive, required when using the pwdump option.
-p | --pwdump <file> The path to output hashes in pwdump format.
-u | --users-csv <file> The path to output user details in CSV format.
-c | --computers-csv <file> The path to output computer details in CSV format.
--history-hashes Include history hashes in the pdwump output.
--dump-reversible <file> The path to output clear text passwords, if reversible encryption is enabled.
--wordlist The path to a wordlist of weak passwords for basic hash cracking. Warning, using this option is slow, the use of a dedicated password cracker, such as 'john', is recommended instead.
--ou-filter-file <file> The path to file containing a line separated list of OUs to which to limit user and computer results.
--base-date <yyyyMMdd> Specifies a custom date to be used as the base date in statistics. The last modified date of the NTDS file is used by default.
--debug Show debug output.
WARNING: Use of the --pwdump option will result in decryption of password hashes using the System Key.
Sensitive information will be stored in memory and on disk. Ensure the pwdump file is handled appropriately
For example, the following command will display statistics, output a file pwdump.txt containing password hashes, and output a file users.csv containing details for each user account.
ntdsaudit ntds.dit -s SYSTEM -p pwdump.txt -u users.csv
Obtaining the required files
NtdsAudit requires the ntds.dit Active Directory database, and optionally the SYSTEM registry hive if dumping password hashes. These files are locked by a domain controller and as such cannot be simply copy and pasted. The recommended method of obtaining these files from a domain controller is using the builtin ntdsutil utility.
-
Open a command prompt (cmd.exe) as an administrator. To open a command prompt as an administrator, click Start. In Start Search, type Command Prompt. At the top of the Start menu, right-click Command Prompt, and then click Run as administrator. If the User Account Control dialog box appears, enter the appropriate credentials (if requested) and confirm that the action it displays is what you want, and then click Continue.
-
At the command prompt, type the following command, and then press ENTER:
ntdsutil
- At the ntdsutil prompt, type the following command, and then press ENTER:
activate instance ntds
- At the ntdsutil prompt, type the following command, and then press ENTER:
ifm
- At the ifm prompt, type the following command, and then press ENTER:
create full <Drive>:\<Folder>
Where <Drive>:\<Folder> is the path to the folder where you want the files to be created.