+- hashcat Forum (https://hashcat.net/forum)
+-- Forum: Support (https://hashcat.net/forum/forum-3.html)
+--- Forum: hashcat (https://hashcat.net/forum/forum-45.html)
+--- Thread: AES (/thread-12257.html)
AES - undefined3 - 12-10-2024
Hi!
There are AES encrypted strings (in BASE64 format, they can also be saved as HEX strings). One string is a separate encrypted text.
Can HashCat be used to decrypt these strings? Each string is decrypted separately. In this case, several bytes are known in the plaintext, they are located one by one in different parts of the plaintext (for example, one known byte is located in position 1, the second byte is located in position 4, etc.).
Both dictionary and brute force are interesting.
RE: AES - nick8606 - 12-10-2024
You need to know something about AES key. Unknown part of key may be max 6-7 bytes.
If you have only plaintext+ciphertext and you know nothing about key then you'll not be able to find key during reasonable time.
RE: AES - undefined3 - 12-10-2024
(12-10-2024, 04:43 PM)nick8606 Wrote: You need to know something about AES key. Unknown part of key may be max 6-7 bytes.
If you have only plaintext+ciphertext and you know nothing about key then you'll not be able to find key during reasonable time.
The key size is known.
Brute force probably won't work. But there is a file with probable keys (HEX).
Does HashCat contain a command interface for brute-forcing AES passwords from a file and the ability to analyze the decrypted version of the data by specific bytes?
RE: AES - nick8606 - 12-10-2024
(12-10-2024, 04:58 PM)undefined3 Wrote: The key size is known.
Brute force probably won't work. But there is a file with probable keys (HEX).
Does HashCat contain a command interface for brute-forcing AES passwords from a file and the ability to analyze the decrypted version of the data by specific bytes?
No.
As I understand you have file containing all possible keys. If so then full number of attempts is not too large. You can create small script or program on any language you prefer, and use CPU. It will be enough. GPU speed isn't necessary.