A Classic Example of Why You Should Only Allow Trusted Apps to Access Your Data

If your employees are given an Android device to use for work, or if they bring in their own as a part of a Bring Your Own Device strategy, you may want to pay special attention to what follows.

Google has just removed a piece of malware that managed to make its way into the listings of the Google Play Store. Disguised as a strategic card game called “Beaver Gang Counter,” the malware seemed at first glance to be a harmless enough app to download as a way to pass some time every now and then. This impression unfortunately turned out to be inaccurate for a few different reasons.

Why Was it a Threat?
First, the app itself reportedly was a bit of a one-trick pony, losing any of its entertainment appeal very swiftly. Of course, what do you do with an app that you’ve grown bored with and no longer want? You delete it to make room for other apps that you will have more use for, but not before the malware comes into play.

The disguised malware would specifically target those whom also had Viber, the vastly more popular communications app, installed on their device. Once the Beaver Gang Counter app was installed, the malware would access the directories contained in Viber as well as uploading any of the user’s Viber images to an external website.

Google has since removed Beaver Gang Counter from the Play Store, and thus far it seems that little damage was done. However, the entire situation asks the question: how did this happen?

There were ultimately a number of factors that led to Beaver Gang Counter having the ability to access files belonging to another app; an ability that the Android platform is supposed to block. However, the security measures put in place by Android do nothing to prevent the review of data saved on the SD removable storage.

Due to the expectation of inter-device compatibility that comes with SD cards, the inter-app file sharing that Android usually blocks is left unfettered in the SD storage, depending on the permissions granted at install. Therefore, if assigned to SD memory (as it would have been in almost all cases), Beaver Gang Counter could potentially access any and all data saved to the SD. Instead, the malware developers had simply chosen to target Viber users specifically.

However, there’s an excellent case to be made that the app should never have reached the Google Play storefront at all, and that Google’s review process seems to need some work.

Upon opening the app, you are brought to the game’s main menu screen, with the following options: Help, Players, Statistics, and the all-important "New Gane”. Yes, you read that right. "New Gane". There was a spelling mistake, right there on the most important element of the main menu, visible from the download screen itself, that Google either missed or disregarded without digging any deeper.

What Does this Mean for My Business?
While Beaver Gang Counter didn’t target anything that would likely damage a business if the malware infiltrated a business-provided or BYOD device, it really makes one consider how many other apps may be out there that could potentially cause harm to a business through similar actions. The only truly clear lesson to be learned from this story is that Google isn’t infallible, and so they cannot be relied upon to defend your company from all threats that are sent through their systems. Ultimately, it falls to you to pick up the slack, and as such, you should implement the following best practices.

• Steer clear of unknown apps: If nobody online is talking about an app, there’s a better chance that it is a less safe option (and that’s the best case scenario). Avoid utilizing unknown and unreviewed apps on business devices. Furthermore, despite their failure to catch Beaver Gang Counter, Google’s marketplace for apps is still much safer than the unregulated Android marketplaces that are out there.
• Keep important data on your actual device: Clearly, Android prioritizes the protection of data on its native storage over that of data stored on removable media. Therefore, you should keep this in mind as you elect where to store data and keep critical files on the device itself.
• Set terms for employee devices: This will admittedly be simpler to enforce with company-provided devices, as BYOD relies on the employee using their own property and therefore a device that they have control of. While you may disable non-company approved apps in devices provided by the company, you may have to take a few extra steps if implementing a BYOD policy. A mandatory security solution may be a fair term for an employee wishing to use their own device, as well as required security best practice training.

By implementing these practices, you just may be able to keep an issue like this one from affecting your company sometime down the line.

For more IT news and best practices, be sure to keep check our blog, and be sure to reach out to PCSOFT if you have any questions about your own security. Give us a call at 02 98730080.