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ntlmpwnd

Check NTLM password hashes against haveibeenpwned list

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ntlmpwnd

Check NTLM password hashes against haveibeenpwned list

Source code for free pascal (fpc) https://www.freepascal.org/ which takes a list of NTLM hashes from https://haveibeenpwned.com/Passwords and compares with your own list of NTLM hashes.

The program has been designed to require low memory and CPU, currently it does not need more than +/- 400 MB of RAM and it runs in single core, so no threads library is needed.

Some details on performance, running the program in a 2012 Intel i7 with a mechanic harddisk.

Time to preprocess source hashes list:
10 mins and 30 seconds. Mostly bound by HD performance.
Final database size:
10 Gigabytes in 32 files.

This first process is needed to be done once.

User NTLM hashes checking speed (all positive):
On a cold drive 237,500 hashes checked in 92 seconds @ 2550 h/s
On a warm drive 237,500 hashes checked in 20 seconds @ 11800 h/s

pascal
NTLM hashes PWND check. (c) 2020 joshyfun (at host) gmail.com. License LGPL.
pascal
Usage: ntlmpwnd.exe -h --help --generate-blocks --check-users [--bits={n}] [--hashes-path={path}]
pascal
-h --help               Show this help page (help a bit longer).  
--generate-blocks       Generate blocks of PWND hashes.  
  --pwndlist={file}     List of PWND hashes.  
--check-users           Generate blocks of PWND hashes.  
  --userslist={file}    List of user names:hashes.  
--check-password={pass} Check one password against the pwndlist.  
--bits                  Bits used to split the PWND list and reduce memory,  
                        by default 5 bits, so 32 slices.  
--hashes-path={path}    Where hashes post-processed will be stored or loaded,  
                        stored when "--generate-blocks" and loaded for "check-users".  
--get-ntlm-hash={pass}  Calculate the NTLM password hash.
pascal
pwndlist file format:
pascal
0123456789ABCDEF0123456789ABCDEF:nnnnn
pascal
Where "0123456789ABCDEF0123456789ABCDEF" is NTLM hash in hexadecimal
and "nnnnn" is a number related with the hash.
pascal
userlist file format.
pascal
john.doe:0123456789ABCDEF0123456789ABCDEF
pascal
Where "john.doe" is the user name (":" is prohibited)
and "0123456789ABCDEF0123456789ABCDEF" is the user's NTLM hash in hexadecimal.