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L0phtCrack 2.52 for
Win95/NT is here!
PLEASE NOTE (12/18/99): L0phtCrack is erroneously
a virus or trojan by several virus scanners. There is no virus or
trojan code in the L0phtCrack distribution file on this site. It is safe
to use. Please contact your
individual Antivirus vendor to report the problem.
L0phtCrack is now listed as part of the NT FAQ in the Password
L0phtCrack has been
downloaded over 500,000 times! The NT IT community
has embraced L0phtCrack as the password auditing tool of choice.
Now we've released L0phtCrack 2.5 to raise the bar another
Do you know your NT password policy is secure?
L0phtCrack 2.5 is
wake-up call. We recently performed an audit of a large high technology
company. Here is what we found.
L0phtCrack 2.5 cracked 90% of the passwords in
under 48 hours on a Pentium II/300.
18% of the passwords were cracked in
under 10 minutes.
The Administrator and most of the Domain Admin
passwords were cracked.
This company had a policy requiring passwords longer than 8
with at least one upper case character plus a numeric or symbol
You might think your password policy is strong, but you'll never know
until you put it to the test.
Download L0phtCrack 2.5 now and give it a
try. You might just surprise yourself.
release 2.5 new
- Major speed increase. The DES routines have been highly
optimized in assembler for Pentium, Pentium MMX, Pentium Pro, and Pentium
processors. This results in a 450% speed increase. All
alphanumeric passwords can be found in under 24 hours on a Pentium
- New hybrid cracking method combines the best qualities of
dictionary cracking with that of brute force cracking.
Passwords that are dictionary words
which have numbers and symbols appended to them are found in minutes.
- SMB Packet Capture is built into the L0phtCrack graphical interface.
Choose a menu item and start collecting LANMAN password hashes as they
travel over the network.
- The SMB Packet Capture now works on Win95/98 machines.
- Custom character sets for brute forcing are supported with an
easy UI to set them.
- More accurate cracking status is displayed. This includes the number
and percentage of cracked passwords and the key rate of the crack
Test: Brute Force crack
Machine: Quad Xeon 400 Mhz
L0phtCrack 2.5 has a free
L0phtCrack was originally
envisioned as an experimental research tool. Many system administrators,
security auditors, and tiger teams have asked for specific features to
make L0phtCrack a more powerful and easier to use tool. We have decided
to give L0phtCrack the quality and feature set needed by computer
security professionals and distribute it with a free trial.
period is 15 days, after which the product must be registered for $100.
command-line, stripped down version of the program is available for free
with source code.