Does anyone know of a tool that will supports encrypted.dmg (OSX disk image) files under Windows? Stack Exchange Network Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. HSENCFS is a user space encrypting file system. Simple to set up, seamless to use, fast, safe, secure and maintenance free. It will encrypt data on the fly written to it, decrypt data read from it. HSENCFS uses only storage space for actual data stored, no pre-allocation needed. It is fast enough for real time Video Encryption. Basically, the app uses xpwntool and especially dmg.exe to Decrypt the ROOT FS DMG file inside the.IPSW Firmware using appropriate Firmware Keys, then using the same keys it encrypts back your modified ROOT File System DMG.
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
None of the versions of Windows operating system supports DMG format out of the box. As you likely know, DMG file is an OS X disk image file and are supported in Mac OS X operating system. One needs to take the help of third-party tools in order to open a DMG file on a PC running Windows operating system.
Those of you have spent considerable amount of time on Mac would know that the DMG is mostly used to install apps on Mac. In other words, apps that we download to install on a Mac OS X use .DMG extension and can be mounted easily by double-clicking on the file on Mac.
While there are a couple of handy options out there to open or extract a DMG file in Windows, we will share the best three tools to deal with DMG files in Windows environment.
DMG Extractor
DMG Extractor is probably the first and only tool designed exclusively to deal with DMG files on Windows OS. Since DMG Extractor is developed specially for DMG files, it can open encrypted .DMG files without having to first convert them to other formats.
Raw, Bzip2, Zlib, and Zero block type DMG files are supported by DMG Extractor.
The only catch with the free version of DMG Extractor is that it can’t open DMG file of size more than 4GB but that shouldn’t be problem for most users.
Using DMG Extractor is fairly simple. After installing the software, right-click on the DMG file that you want to open and then click Open option to open the file with DMG Extractor. Alternatively, after launching DMG Extractor, click Open button and then select the DMG file to contents of the selected DMG file.
To extract a DMG file, click the Extract button and then select a location to save the contents.
HFSExplorer
Another free utility that you can install on your Windows machine to extract DMG files is HFS+ Explorer. With HFSExplorer you can open Mac-formatted disks and disk images in Windows.
While HFSExplorer is relatively easy-to-use, we must mention that it’s not as straight-forward as DMG Extractor. You need to install Java SE Runtime Environment 5.0 or above in order to run HFSExplorer and it doesn’t support all type of DMG format, including DMG UDF format.
However, on the plus side, there is no size restriction per file.
Here is how to use HFSExplorer to open DMG files
Step 1: Download and install Java SE Runtime Environment 5.0 or greater version.
Step 2: Visit this page to download HFSExplorer and run the installer to get it installed.
Step 3: Run HFSExplorer, click File menu, and click Load file system from path option to browse to the DMF file.
If you have come across a better solution to open DMG files in Windows, dos share with us in comments.
7-Zip Free
Decrypt Dmg File Without Key
Most PC users are familiar with 7-Zip utility. If you haven’t used 7-Zip before this, it’s a free tool used to compress and uncompressed files. In addition to 7z, Zip, and RAR formats, 7-Zip also supports DMG format. However, it’s important to note that 7-Zip supports only unpacking of DMG files.