Brute-Forcing RAR/WinRAR Archive Passwords: Masks, Dictionaries, GPUs

Cracking a RAR password is a long brute-force search — one that needs time, a capable computer, and a program that knows how to narrow the hunt. There's no "fast" here, and the reason is baked into the format itself.

RAR is locked down with strong encryption algorithms, so the RAR password search speed is always low. Add the archive's size: it drags the verification down too (here's why the speed counter can lie).

That gives us three requirements for a RAR password cracking program:

• narrow the range of the search
• top search speed for passwords
• support for AMD, NVIDIA, and Intel Arc GPUs

We at Passcovery have been building password recovery software since 2008. For cracking RAR passwords, we recommend Accent RAR Password Recovery — it covers all three requirements at once.

The Search Range: How to Cut Out the Pointless Passwords

The search range is the set of passwords the program actually tests. The tighter it is, the faster the crack: cut what's pointless, add what's needed.

Brute force runs through too many candidates; a dictionary attack, too few. So the range needs to be managed by hand. AccentRPR gives you two tools for that.

• an extended mask for brute force. The mask sets the list of possible characters for each position in the password and cuts out pointless checks.
  Say the first position is a digit only, the second an uppercase letter, then any non-digit characters, and a special character at the end. That describes a password like "1PassW0rD!".
  Here's what it looks like on a real password.
  A great move when you know at least roughly how the password is built;
• mutation scenarios for a dictionary attack. A scenario sets the rules for transforming a word and digs up variants an ordinary dictionary would never reach.

  For instance, reading "baseball" from the dictionary, AccentRPR will build "B@seb@!!99" out of it on its own:

  Your odds against a seemingly tough RAR password go up noticeably.

Get a handle on the range — and you save time recovering a RAR password.

Search Speed: a Core Tuned to Your Processor

RAR password search speed is set by the format itself: the author of WinRAR deliberately slowed down password verification. There's no getting around that slowdown — all that's left is to claw it back with optimized code.

Accent RAR Password Recovery sizes up your system and puts to work an internal compute core optimized for your specific processor. There are already more than ten of these cores — a separate one for each Intel and AMD family.

That's how the program squeezes the most out of your processor on any modern computer.

But CPU optimizations aren't the ceiling.

AMD, NVIDIA, and Intel Arc GPUs: Tens of Times Faster

Graphics cards, with their thousands of streaming processors, speed up RAR password cracking by tens of times (the exact boost depends on your computer's configuration and the specific archive).

Accent RAR Password Recovery doesn't compromise here: the program runs on AMD, NVIDIA, and Intel Arc graphics cards and loads them to a full 100%, just like the processor.

Which graphics card cracks RAR passwords faster and gives you more for your money — you'll see in the GPU performance rankings. And before you buy, take a look at the breakdown of why VRAM capacity doesn't affect this.

The AccentRPR Demo: Try Before You Buy

The Accent RAR Password Recovery demo is free and always available — on the official site. Every Passcovery program shares the same interface and the same attacks: learn one, and you'll find your way around any of them.

How to Crack a RAR Archive Password Faster: In Short

A RAR archive password gives way to brute force alone: the algorithm has no weak spots. To make that search take less time, narrow the range with an extended mask or dictionary mutation and bring in your graphics cards — AMD, NVIDIA, or Intel Arc — they speed the search up by tens of times. Accent RAR Password Recovery does all of this, and its demo is free.

About the Author

Denis Gladysh, co-owner and head of Passcovery, a maker of high-speed, GPU-accelerated password recovery software for popular file formats. Denis wrote the first versions of Accent OFFICE Password Recovery back in 1999.

Brute-Forcing a RAR Password: Three Common Questions

What Is Brute Force?

Brute force is running through every possible password in sequence until the right one turns up. "Brute force" means raw strength — hence the other names: a brute-force attack, or the exhaustive-search method.

Picture a field of identical nuts where you need one specific nut: brute force checks them row by row until it hits the right one. In practice, you set the rules the program uses to generate a batch of passwords, and it checks them one by one. A bigger batch means a longer check.

How Do You Brute-Force a RAR/WinRAR Password?

Brute-forcing a RAR/WinRAR password in Accent RAR Password Recovery is ten steps:

1. Open the password-protected RAR archive in AccentRPR
2. Specify whether to scan blocks compressed with the PPMd algorithm
3. Choose the "Brute-force" attack
4. Pick the right alphabet from the dropdown list
5. Check the character sets you need: uppercase and lowercase letters, digits, special characters
6. If needed, turn on "User defined" mode and edit the character list: remove what's extra, add what's missing
7. Set the minimum and maximum password length
8. If you know part of the password, set a simple mask
9. Watch how the number of passwords to check changes as you adjust the set and the length
10. Click "OK" and start brute-forcing the RAR/WinRAR password

Can You Crack a RAR Password with Brute Force?

Yes — brute force is the only thing that cracks a RAR password: the algorithm has no weak spots, so a search is all that's left.

From there it's about setup: generate passwords from a mask or play with dictionaries, but always narrow the range and speed things up on AMD, NVIDIA, and Intel Arc graphics cards. That's the recipe for success.

Though there's always a shot at a troll password — super short, or straight out of the top 10 most common ones. 😆