CrowBar is somewhat out-of-date. Probably the most comprehensive and up-to-date free password-recovery package is JohnTheRipper. Among many other formats, it can test.dmg's as well. Note that JtR does not 'break' the encryption, it just automates and speeds the process of trying thousands (or millions, or trillions) of dictionary-based. Because the files are encrypted using AES, it'll take a really really really REALLY long time to crack the password if your password isn't in the dictionaries, so it's safe to assume your files are gone forever. However, applications such as Spartan will attempt to crack DMGs if you really want the files inside.
John the Ripperis a fast password cracker, available for many operating systems.Its primary purpose is to detect weak Unix passwords,although Windows LM hashesand a number of other password hash types are supported as well.John the Ripper is free and Open Source software,distributed primarily in source code form. John the Ripper Pro builds upon the free John the Ripper to delivera commercial product better tailored for specific operating systems.It is distributed primarily in the form of 'native' packages forthe target operating systems. |
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John the Ripper Pro isavailable for a number of operating systems.This web page describes the Mac OS X revision of John the Ripper Pro.
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On Mac OS X, the features currently specific to Pro versions are:
- Pre-built and well-tested native package (dmg),which may be installed the usual way - no need to compile
- Universal binary that will run optimally on current 64-bit Intel Macs making use of SSE2 acceleration,but will also run on older Macs
- A large multilingual wordlist optimized specificallyfor use with John the Ripper (4,106,923 entries, 43 MB uncompressed)is included in the package,and John the Ripper is pre-configured for its use
- XPWDUMP tool, which dumps password hashes from Mac OS X systemsfor subsequent auditing/cracking
- The included documentation is revised to be specificfor the given package on Mac OS X rather than generic,making it easier to understand
- As a bonus, the full source code is also provided
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For newer Apple hardware and to support macOS Catalina and Big Sur, builds of JtR jumbo are also provided,including one that uses AVX2 for a speedup on recent Intel Macs,and another that will run on Apple M1 (via Rosetta 2, which is part of macOS).
The links below allow you to pay online with a variety of payment methods, or to choose to pay offline.
- John the Ripper 1.7.3.1 Pro for Mac OS X with upgrades and support -$185.00
site-wide or consultant license (at your option),
dmg package (13 MB),free upgrades to further 1.x Pro releases for Mac OS X,
1 year of e-mail support on JtR Pro and JtR jumbo (up to 2 hours) - John the Ripper 1.7.3.1 Pro for Mac OS X with upgrades - $89.95
site-wide or consultant license (at your option),
dmg package (13 MB),free upgrades to further 1.x Pro releases for Mac OS X,
installation support by e-mail within the first 30 days (up to 1 hour) - John the Ripper 1.7.3.1 Pro for Mac OS X introductory offer - $39.95
site-wide or consultant license (at your option),
dmg package (13 MB),
installation support by e-mail within the first 30 days (up to 1 hour)
Your purchase will be from FastSpring, a trusted reseller of software products and services.
Your private download directory will be created and made available to youimmediately upon receipt of your payment.
Unconditional 7-day money back guaranteefor purely online payments (including credit card payments, but not including bank wire transfers):if you're for any reason or for no reason at all unsatisfied with the product or download service,we will refund your payment on your request if the request arrives within 7 days after your payment date.
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Low price guarantee:our prices on this product are the lowest you can find.If you find a better price on a commercial product with at least the same functionality, for the same operating system,with upgrades and support similar to those included with your purchase, and if you inform us within 30 days of your payment,we will gladly refund the price difference.Shop with confidence!
Please don't hesitate to e-mail us at <orders at openwall.com>if you experience any problems placing an order or completing your download, or to request a refund.
The following password hash types are currently supported(and more are planned):
- Traditional DES-based Unix crypt(3) -most commercial Unix systems (Solaris, AIX, ...),Mac OS X 10.2, ancient Linux and *BSD
- 'bigcrypt' - HP-UX, Tru64 / Digital Unix / OSF/1
- BSDI-style extended DES-based crypt(3) - BSD/OS, *BSD (non-default)
- FreeBSD-style MD5-based crypt(3)- older Linux, FreeBSD, NetBSD, Cisco IOS, OpenBSD (non-default)
- OpenBSD-style Blowfish-based crypt(3)- OpenBSD, some Linux, other *BSD and Solaris 10+ (non-default)
- Kerberos AFS DES-based hashes
- LM (LanMan) DES-based hashes -Windows NT/2000/XP/2003, Mac OS X 10.3
- NTLM MD4-based hashes -Windows (all versions)
- Mac OS X 10.4 - 10.6 salted SHA-1 hashes
You can browse the generic documentation for John the Ripper online.Also relevant is ourpresentation on the history of password security.
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Let's cut to the chase right now:
Cracking encrypted disk image, AKA DMG is feasible, but, and there are many buts, is extremely, extremely time consuming.
If you do not remember at all the password, or if you attempt to crack in 'blind mode', you will probably need to teach your kids how to do it: By the time you'll have a fighting chance, you'll be long dead.
Step 1: Write down everything you can remember about the forgotten password, i.e what you could have used, and what you are sure not to have used, i.e. never used a space or a '@' sign.
Step 1a: If you remember enough of your password, or if you are just missing trailing numbers i.e Mypassword???? >> MyPassword1234 and do not remember if it's 1234 or 4321, or 9999, Just use CrowbarDMG and a Wordlist.
For good Wordlists, go here!
If you need to create a specific wordlist (because you remember what you may have used and, most importantly, what you may have not used, go here and look for Wordlists On Demand)
Warning!: CrowbarDMG is slow!
CrowbarDMG is basically a GUI for the hdiutil command
ETA for trying 9999 passwords: About 3 hrs
99,999 passwords: About 30 hrs
999,999 passwords: About 300 hrs Or 12 days ....
Step 2: Do you know how to compile and use John The Ripper? I mean 'use it! including editing Rules, etc?
--> No? Proceed here. Read carefully. Pause. Repeat.
--> Yes! Ok, Sure?
1) Download JTR, version Bleeding Jumbo by Magnum
As of Aug 2013, it's here otherwise here
2) Compile. Don't forget to edit the Makefile and John.conf. Check for CUDA and OMP/MPI RUN. Creating a new Charset? that could be wise...
3) Run dmg2John.py to extract the hash
python [path to file ]dmg2john.py [path to file] myfile.dmg > dmg.txt
4) Edit/Create your rules as needed
5) ./ John etc (Run Baby, run ....)
6) There is always Hashcat (Win/Lin)
7) Because most you have seen, in movies, Hackers cracking an AES within minutes, you'll try without thinking too much about it.
It's going to leave you with a lot of time to read ....
Enjoy ...
8) Without going into too much details, the use of GPU assisted is highly recommended. If you have one of those ones, you'll most likely increase your speed by a factor of 1000, sometimes 10,000 times faster.
☞ Password Cracking AES-256 DMGs and Epic Self-Pwnage
(The Keyword here is: 25 GPU)
☞ 'If you have thought about a new cracking method, It's probably already in JtR'
(Matt Weir) (Quoted liberally)
☞ 'I don't care if the NSA teams up with the KGB, a full random 15Ch long AES is practically unbreakable in a lifetime.
(Matt Weir, Quoted Very Liberally, From circa 2009)
EPAG: Empirical Poke-Around Graph
Markov Probabilities