![]() Here is a step-by-step on the brute-force: ĭrJack60 Then such a drive is actually LESS secure than a hardware device with an encrypted container within? I'd still personally suggest BitLocker over VC as your boot drive encryption option if you use Windows. VeraCrypt is very safe providing you use a good password. This thread was about how someone brute forced a VeraCrypt container, not if VeraCrypt is insecure after all. It's mostly used as exercises, and you'll need to know PIM/algorithm used too. I should stress again this is only really possible to be successful for really weak passwords or already known ones. Image the VeraCrypt encrypted USB with a command line tool like dd to clone the first 512 bytes to a new file, then you can place through Hashcat or Passware again to brute force. Yes, it is the same process, Hash is stored in the first 512 bytes of the drive. Modern and secure smartphones uses the hardware security module for the encryption process and is much safer like the above comment stated.ĭrJack60 So what about a Veracrypt encrypted flash drive, I assume the hash is stored and so can it be read? Lastly, if your device was taken while it was capable of having it's memory imaged you have a lot more to worry about, considering your device would have to be unlocked. An example is BitLocker in Windows, configured with a startup PIN via group policy, although they would still be vulnerable if your memory was imaged while unlocked. Use a secure password and you wont have this problem.Įncryption software that incorporates hardware security such as a TPM would be less susceptible to issues like this as key data would be isolated and stored in a dedicated hardware module. For containers with strong passwords a memory image would be required (which requires sophisticated equipment or a threat actor taking the image / device while it was unlocked). If you used a very long password as they suggest with numbers, letters, symbols etc then this doesn't count to you. This scenario would only apply if you used a very weak password. VeraCrypt containers are not cracked and neither is the encryption. L8437 does this mean it's all crackable, or is it because of the short password? Salting the input can help produce a different hash for the same original input, however it's not very useful if you also know what the salt is or the mechanisms used to create one. ![]() While the hash is still an encrypted string, it won't be any useful if your PIN/password is weak because the hash is only different when the input is. ![]() VeraCrypt keys are stored in the memory when the device or volume is decrypted. Tools for decrypting VeraCrypt/TrueCrypt volumes exist such as HashCat, or for investigators they would be more inclined to use Passware: - Passware works a lot better however they are only truly effective if you have imaged the memory of the device or provided a memory dump to the software. Because the hash can essentially be processed elsewhere after known, it can completely bypass any anti-bruteforce mechanisms. After obtaining the hash, the attacker could then try and bruteforce it. This means that it is stored on the hard disk if it's a boot drive, or in the VeraCrypt container file if it is anything else.Ī threat actor could image the drive (if a boot drive) or copy the container file (if anything else) and then see the hash of the decryption password. VeraCrypt and predecessor TrueCrypt have an unusual aversion to using a TPM and won't store anything in a dedicated hardware security module. When you encrypt your storage, the hash of the decryption password has to be stored somewhere for the encrypted drive bootloader (in this case the VeraCrypt bootloader) to check for the right password. L8437 Why was he able to retrieve the password? There are some ways to see what algorithm the hash is such as looking at it's length or by putting it through tools. L8437 Now baring in mind he said "you have to know the encryption that was used, and the hash"Ĭorrect, you have to know both the algorithm and the hash because each algorithm will generate the same input (in this case, the drive's password) differently.
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