I made a separate script to convert this dictionary to a dash separated dictionary in order to specifically target the keys with the format word 1 -word 2 -…-word n dash separated lowercase words. In a mask attack we provide a string with placeholders. This way I can ensure that the book is up-to-date with the latest and greatest, and hopefully make it relevant for the foreseeable future unlike MOXiI 1, which my then-publisher didn’t let me cover The Volume I explains how libMobileGestalt internally works. The brute force will try all words starting with MGCopyAnswer followed by 3 characters from the custom charset 1 4 characters keys could easily be recovered too using hashcat -a 3 -m 0 md5hashes.
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It first checks if the string passed as parameter exists as key in the database.
For the protected keys like the BluetoothAddressyou will get a nil value and see a warning in the logs:. Note that some keys did not libmobilegestlt the formats I targeted:.
The placeholder characters will be brute force with the specified charset. Such attack can quickly recover simple keys. All devices released after these use the new format:. A bunch of keys can be recovered with this dictionary by running hashcat -a 0 -m 0 md5hashes.
Those aren’t a jtool bug: However a lot of the keys are encrypted to hide their meaning. Yours truly will be there to deliver the training – and I’d love it if we had a packed classroom!
ios – where is – Stack Overflow
But we can recover even more keys with a combinator attack. It is also very important to not change this to an invalid MAC address. For more details about the MGCopyAnswer implementation and the method I used to brute force obfuscated keys, please refer to the previous article Deobfuscating libMobileGestalt keys.
I built a much better dictionary by extracting all the strings from iOS. The code from the listing above – which I’ve affectionally dubbed guesstalt as I used it to brute force values is available for download from the websitealong with other enhancements, like mapping the keys to their obfuscated form. Navigation menu Personal tools Log in.
It is however still possible to use the mask attack with more specific formats like: Using a simple English dictionary, I could recover a couple of keys but obviously the words in the dictionary are less than ideal. Note however that there is no guarantee the list is complete. Updated list of libmobilegestatl MD5 In order to run a brute force attack, we need to get the MD5 hashes from the obfuscated keys.
There are several good solutions to brute force MD5 hashes. Starting with 8 characters the libmobilegestal attack starts to take too much time with my hardware multiple days. In this example the key dylibb a clear string ProductVersion. I haven’t taken to libmobilegestalg the above keys or other or so I’ll eventually add the list in a txt file that guesstalt will be able to parsebut this should prove to be a great vantage points for iOS coders who want to get this information into their apps or tweaks.
The implementation is similar to a key-value database and the library exposes a simple function to retrieve the value for a specified key:. The daemon itself, however, is running as uid mobileand declares entitlements for itself as follows:.
But the first obvious attack is a mask attack. I ran various brute force attacks using hashcat to recover as much key as possible: In particular, I’m taking requests for other frameworks and daemons to dissect.
The dictionary built by extracting the iOS strings contain a lot of duplicates. Fortunately, jtool and other tools like decache can extract from the shared cache – so you might want to follow along by breaking out MG from a decrypted DMG or from your device itself. Note however that there is no guarantee the list is complete.
Miscellaneous Ground rules Timeline. In most of my mask attacks I used the custom charset? By trying the code on the list of keys above, you’ll see it works in most cases. Note that some keys did not match the formats I targeted: