Posts Tagged ‘Elcomsoft Distributed Password Recovery’

How to Break 70% of Passwords in Minutes

Tuesday, February 14th, 2017

According to surveys, the average English-speaking consumer maintains around 27 online accounts. Memorizing 27 unique, cryptographically secure passwords is nearly impossible for a person one could reasonably call “average”. As a result, the average person tends to reuse passwords, which means that a single password (or its simple variations) can be used to protect multiple online accounts and services. The same passwords are very likely to be chosen to protect access to offline resources such as encrypted archives and documents. In fact, several independent researches published between 2012 and 2016 suggest that between 59 and 61 per cent of consumers reuse passwords.

Considering how consistent the numbers are between multiple researches carried out over the course of four years, we can safely assume that around 60% of consumers reuse their passwords. How can this data help us break passwords, and how did we arrive to the value of 70% in the title? Read along to find out! (more…)

How to Break 30 Per Cent of Passwords in Seconds

Monday, February 6th, 2017

This article opens a new series dedicated to breaking passwords. It’s no secret that simply getting a good password recovery tool is not enough to successfully break a given password. Brute-force attacks are inefficient for modern formats (e.g. encrypted Office 2013 documents), while using general dictionaries can still be too much for speedy attacks and too little to actually work. In this article, we’ll discuss the first of the two relatively unknown vectors of attack that can potentially break 30 to 70 per cent of real-world passwords in a matter of minutes. The second method will be described in the follow-up article. (more…)

Building a Distributed Network in the Cloud: Using Amazon EC2 to Break Passwords

Thursday, July 28th, 2016

Not all passwords provide equal protection. Some formats are more resistant to brute-force attacks than others. As an example, Microsoft Office 2013 and 2016 employ a smart encryption scheme that is very slow to decrypt. Even the fastest available GPU units found in NVIDIA’s latest GeForce GTX 1080 will only allow trying some 7100 passwords per second.

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One solution is employing a custom dictionary, possibly containing the user’s passwords that were easier to break. Observing the common pattern in those other passwords may allow creating a custom mask that could greatly reduce the number of possible combinations.

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Breaking BitLocker Encryption: Brute Forcing the Backdoor (Part II)

Wednesday, July 27th, 2016

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How often do you think forensic specialists have to deal with encrypted containers? Compared with office documents and archives that are relatively infrequent, every second case involves an encrypted container. It may vary, but these evaluations are based on a real survey conducted by our company.

It is hard to overestimate the importance of the topic. In the first part of our story we discussed the way of getting access to encrypted volumes using an encryption key. Now, let’s see which other ways can be used.

Unlike Elcomsoft Forensic Disk Decryptor, Elcomsoft Distributed Password Recovery does not search for existing decryption keys. Instead, it tries to unlock password-protected disks by attacking the password. The tool applies an impressive variety of techniques for attacking the password. In this case, the whole disk encryption scheme is only as strong as its password. Fortunately, the tool can execute a wide range of attacks including wordlist attack, combination attacks, mask attacks, smart attacks and so on and so forth, with advanced GPU acceleration and distributed processing on top of that. The whole sophisticated arsenal comes in particularly handy if we speak about more or less secure passwords.

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Mac OS Forensics: Attacking FileVault 2

Wednesday, July 27th, 2016

In the world of Windows dominance, Apple’s Mac OS X enjoys a healthy market share of 9.5% among desktop operating systems. The adoption of Apple’s desktop OS (macOS seems to be the new name) is steadily growing. This is why we are targeting Mac OS with our tools.

This time, let’s talk about Mac OS X user account passwords. Not only will a user password allow accessing their Mac, but it will also allow decrypting FileVault 2 volumes that are otherwise securely encrypted with virtually unbreakable XTS-AES.

Attacking FileVault 2

FileVault 2 is Apple’s take on whole-disk encryption. Protecting the entire startup partition, FileVault 2 volumes can be unlocked with either of the following:

  • 256-bit XTS-AES key
  • Recovery Key
  • User password from any account with “unlock” privileges

There is also an additional unlock method available called Institutional Recovery Key. These recovery keys are created when system administrators enable FileVault 2 encryption with FileVaultMaster.keychain. This method requires additional steps to activate, and is typically used in organizations with centralized keychain management.

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NVIDIA Pascal: a Great Password Cracking Tool

Tuesday, July 26th, 2016

During the last several years, progress on the CPU performance front has seemingly stopped. Granted, last-generation CPUs are cool, silent and power-efficient. Anecdotal evidence: my new laptop (a brand new Macbook) is about as fast as the Dell ultrabook it replaced. The problem? I bought the Dell laptop some five years ago. Granted, the Dell was thicker and noisier. It’s battery never lasted longer than a few hours. But it was about as fast as the new Macbook.

Computer games have evolved a lot during the last years. Demanding faster and faster video cards, today’s games are relatively lax on CPU requirements. Manufacturers followed the trend, continuing the performance race. GPUs have picked up where CPUs have left.

NVIDIA has recently released a reference design for GTX 1080 boards based on the new Pascal architecture. Elcomsoft Distributed Password Recovery 3.20 adds support for the new architecture. What does it mean for us?

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Breaking BitLocker Encryption: Brute Forcing the Backdoor (Part I)

Wednesday, June 8th, 2016

Investigators start seeing BitLocker encrypted volumes more and more often, yet computer users themselves may be genuinely unaware of the fact they’ve been encrypting their disk all along. How can you break into BitLocker encryption? Do you have to brute-force the password, or is there a quick hack to exploit?

We did our research, and are ready to share our findings. Due to the sheer amount of information, we had to break this publication into two parts. In today’s Part I, we’ll discuss the possibility of using a backdoor to hack our way into BitLocker. This publication will be followed by Part II, in which we’ll discuss brute-force possibilities if access to encrypted information through the backdoor is not available. (more…)

Video Tutorial on Decryption of Windows EFS-encrypted Data

Monday, July 6th, 2015

Although we’ve already embraced the EFS-encryption/decryption in some of our white papers and case studies, now we’d like to share a video tutorial because seeing once is better than hearing reading twice. So, in this video you will see how to decrypt EFS-encrypted data with help of Advanced EFS Data Recovery and how to recover Windows user account password with Proactive System Password Recovery (because it’s still obligatory for this type of encryption).

Advanced EFS Data Recovery (AEFSDR) is wholly dedicated to decryption of Windows EFS-encrypted files, however in order to decrypt the data the program still requires the user account password. Yeah, you might think at first that anyone can decrypt the data having user account password at hand, but no. You can’t. EFS encryption uses more than just logon password, nonetheless it’s the core ingredient in data decryption and so it must be provided.

If you forgot the logon password or didn’t know it at all Proactive System Password Recovery (PSPR) in its turn can help you acquire all system passwords once you can log into the system with administrator privileges. Exactly this example has been illustrated in our video (provide by Sethioz), here it is:

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