Archive for the ‘Software’ Category

Android 8.0 Oreo: Your Text Messages Are in the Cloud Now

Thursday, September 21st, 2017

In each major Android update, Google improves security on the one hand, and moves a few more things to the cloud on the other. The recently finalized and finally released Android 8.0 Oreo adds one important thing to all devices running the newest build of Google’s OS: the ability to back up SMS text messages into the user’s Google Account.

If you follow our blog, you may recall we’ve already talked about the issue a few months ago. Back in April, we were excited to introduce a new feature to Elcomsoft Cloud Explorer, enabling cloud acquisition of text messages from Google Account. Back then, the feature was limited strictly to Google Pixel and Pixel XL devices running Android 7 Nougat.

The release of Android 8.0 Oreo has finally brought the feature to all devices regardless of make and model, allowing any device to back up and restore SMS text message via the user’s Google Account.

We updated Elcomsoft Cloud Explorer accordingly, enabling support for cloud-based SMS extraction for devices running Android 8. There aren’t many of those yet aside of Google Pixel and Pixel XL devices, but many users of Nexus 5x and 6p have already received the update. More devices will follow. Let’s have a look at how this new feature works. Before we begin, let us first clear the confusion that arises between Android data sync and data backups. (more…)

Elcomsoft Phone Breaker 8, New Apple Devices and iOS 11

Thursday, September 14th, 2017

With all attention now being on new iPhone devices, it is easy to forget about the new version of iOS. While new iPhone models were mostly secret until announcement, everyone could test iOS 11 for months before the official release.

Out previous article touches the issue of iOS 11 forensic implications. In this article we’ll cover what you can and what you cannot do with an iOS 11 device as a forensic expert. We’ll talk about which acquisition methods still works and which don’t, what you can and cannot extract compared to iOS 10, and what you need to know in order to make the job don’t.

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iOS 11: jailbreaking, backups, keychain, iCloud – what’s the deal?

Thursday, September 14th, 2017

iOS 11 is finally here. We already covered some of the issues related to iOS 11 forensics, but that was only part of the story.

Should we expect a jailbreak? Is there still hope for physical acquisition? If not, is logical acquisition affected? Are there any notable changes in iCloud? What would be easier to do: logical or iCloud acquisition, and what are the prerequisites for either method? What do you begin with? How to make sure the suspect does not alter their iCloud storage or wipe their device in the process? Can we actually get more information from the cloud than from the device itself, even with physical, and why?

Spoiler: the short answer to the last question is “yes”. The long answer is a bit complicated. Keep reading.

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New Security Measures in iOS 11 and Their Forensic Implications

Thursday, September 7th, 2017

Apple is about to launch its next-generation iOS in just a few days. Researching developer betas, we discovered that iOS 11 implements a number of new security measures. The purpose of these measures is better protecting the privacy of Apple customers and once again increasing security of device data. While some measures (such as the new S.O.S. sequence) are widely advertised, some other security improvements went unnoticed by the public. Let us have a look at the changes and any forensic implications they have.

Establishing Trust with a PC Now Requires a Passcode

For the mobile forensic specialist, one of the most compelling changes in iOS 11 is the new way to establish trust relationship between the iOS device and the computer. In previous versions of the system (which includes iOS 8.x through iOS 10.x), establishing trusted relationship only required confirming the “Trust this computer?” prompt on the device screen. Notably, one still had to unlock the device in order to access the prompt; however, fingerprint unlock would work perfectly for this purpose. iOS 11 modifies this behaviour by requiring an additional second step after the initial “Trust this computer?” prompt has been confirmed. During the second step, the device will ask to enter the passcode in order to complete pairing. This in turn requires forensic experts to know the passcode; Touch ID alone can no longer be used to unlock the device and perform logical acquisition.

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How to Extract iCloud Keychain with Elcomsoft Phone Breaker

Tuesday, August 22nd, 2017

Starting with version 7.0, Elcomsoft Phone Breaker has the ability to access, decrypt and display passwords stored in the user’s iCloud Keychain. The requirements and steps differ across Apple accounts, and depend on factors such as whether or not the user has Two-Factor Authentication, and if not, whether or not the user configured an iCloud Security Code. Let’s review the steps one needs to take in order to successfully acquire iCloud Keychain.

Pre-Requisites

Your ability to extract iCloud Keychain depends on whether or not the keychain in question is stored in the cloud. Apple provides several different implementations of iCloud Keychain. In certain cases, a copy of the keychain is stored in iCloud, while in some other cases it’s stored exclusively on user’s devices, while iCloud Keychain is used as a transport for secure synchronization of said passwords.

In our tests, we discovered that there is a single combination of factors when iCloud Keychain is not stored in the cloud and cannot be extracted with Elcomsoft Phone Breaker:

  • If the user’s Apple ID account has no Two-Factor Authentication and no iCloud Security Code

In the following combinations, the keychain is stored in the cloud:

  • If the user’s Apple ID account has no Two-Factor Authentication but has an iCloud Security Code (iCloud Security Code and one-time code that is delivered as a text message will be required)
  • If Two-Factor Authentication is enabled (in this case, one must enter device passcode or system password to any device already enrolled in iCloud Keychain)

In both cases, the original Apple ID and password are required. Obviously, a one-time security code is also required in order to pass Two-Factor Authentication, if enabled. (more…)

Acquiring Apple’s iCloud Keychain

Tuesday, August 22nd, 2017

Who needs access to iCloud Keychain, and why? The newly released Elcomsoft Phone Breaker 7.0 adds a single major feature that allows experts extracting, decrypting and viewing information stored in Apple’s protected storage. There are so many ifs and buts such as needing the user’s Apple ID and password, accessing their i-device or knowing a secret security code that one may legitimately wonder: what is it all about? Let’s find out about iCloud Keychain, why it’s so difficult to crack, and why it can be important for the expert.

What is iCloud Keychain

iCloud Keychain is Apple’s best protected vault. Since iCloud Keychain keeps the user’s most sensitive information, it’s protected in every way possible. By breaking in to the user’s iCloud Keychain, an intruder could immediately take control over the user’s online and social network accounts, profiles and identities, access their chats and conversations, and even obtain copies of personal identity numbers and credit card data. All that information is securely safeguarded.

Why It Can Be Important

Forensic access to iOS keychain is difficult due to several layers of encryption. Due to encryption, direct physical access to a locally stored keychain is normally impossible; the only possible acquisition options are through a local password-protected backup or iCloud Keychain. (more…)

Attacking the 1Password Master Password Follow-Up

Friday, August 18th, 2017

We received some great feedback on the original article about attacking master passwords of several popular password managers. In one discussion, our benchmark numbers for 1Password were questioned. We had no choice but to re-run the benchmarks and publish an updated chart along with some technical details and explanations. We bring our apologies to AgileBits, the developers of 1Password, for letting the wrong number creep in to our benchmark. Can we still break into 1Password by attacking the master password? Please bear with us for up-to-date information and detailed technical discussion.

We must make one thing extremely clear: this time we did not “hack” anything. We are using good old brute force, enhanced with GPU acceleration, to attack the user’s plain-text master password protecting password managers’ encrypted databases. The four password managers were and still remain secure providing that the user opts for a strong master password. If a truly secure master password is used, it would not be possible to break it within reasonable timeframe.

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Breaking Passwords in the Cloud: Using Amazon P2 Instances

Tuesday, August 1st, 2017

Cloud services such as Amazon EC2 can quickly deliver additional computing power on demand. Amazon’s recent introduction of the a type of EC2 Compute Units made this proposition much more attractive than ever before. With Elcomsoft Distributed Password Recovery now supporting Amazon’s new P2 instances, each with up to 16 GPU units, users can get as much speed as they need the moment they need. In this article, we’ll discuss the benefits of using cloud compute units for password recovery, and provide a step-by-step guide on how to add virtual instances to Elcomsoft Distributed Password Recovery. (more…)

WhatsApp: The Bad Guys’ Secret Weapon

Wednesday, July 19th, 2017

WhatsApp is one of the most secure messengers with full end-to-end encryption. Messages exchanged between WhatsApp users are using an encrypted point-to-point communication protocol rendering man-in-the-middle attacks useless. WhatsApp communications are never stored or backed up on WhatsApp servers. All this makes government snooping on WhatsApp users increasingly difficult.

WhatsApp has more than a billion users. WhatsApp makes use of the Open Whisper Signal communication protocol to secure communications with end-to-end encryption. WhatsApp users rely on that security to freely exchange messages, discuss sensitive things and, with limited success, avoid religious and political oppression in certain countries. Today, some governments attempt to criminalize WhatsApp protection measures, ban end-to-end encryption and do everything in their power to undermining trust in secure communication tools. What is it all about, and how to find the right balance between public safety and security is the topic of this article.

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iCloud Outage, New Token Expiration Rules and Fixes for Authentication Issues

Tuesday, July 11th, 2017

In early July, 2017, Apple has once again revised security measures safeguarding iCloud backups. This time around, the company has altered the lifespan of iCloud authentication tokens, making them just as short-lived as they used to be immediately after celebgate attacks. How this affects your ability to access iCloud data, which rules apply to iCloud tokens, for how long you can still use the tokens and how this affected regular users will be the topic of this article.

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