Hello,
My name is Jo and I'm a PC-Technician/Support/Network Junior-Engineer.
A part of my job is helping people with losts passwords.
I have about 10 fast computers (i7, 12GB RAM, GTX 560 GPU's (very important for password recovery/cracking)
Because I don't have information about of the passwords are for the 3 RAR files are the same or not.
I would estimate to finish this project within 10 days,
But it's really hard to say because I don't know how long the password lenght.
I recovered RAR (and other) passwords before with mostly of the time.
A quick result.
But like I said, it's really hard to say of it will be quick (like 3 days or something) of take the full 10 days. and it's not possible to guaranty that the password can be cracked,
but most of the times (about 75-80%) could I succesfully recover the password.
My plan for this project is to do also a brute force attack, but combined with 10 fast computers that are working together for faster results.
With kind regards,
Jo