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Hackers Are Hiding Code In Images To Fool Mac Users
February 16 2019

Hackers Are Hiding Code In Images To Fool Mac Users

wukovits Apple, Blog, General Interest, Malware and Virus Protection, Recent News, Security, Technology News

In the world of hacking, steganography ranks as one of the most difficult methodologies to detect.

If you’re not familiar with the term, it is the practice of embedding executable code inside images, which makes it virtually impossible to detect.

The reason is simple:  Virus scanners are built around the idea of searching for text strings with identifiable malicious characteristics and markers, but images aren’t that at all.  However, if carefully crafted, they can deliver the same poisoned payloads.

Recently, Apple users have been experiencing this firsthand, courtesy of a group calling themselves ‘VeryMal,’ which has been targeting Apple users in exactly this way. They’ve been using code embedded in ad images to redirect users browsing the web away from legitimate sites and onto malicious ones, which serve as hosts for a variety of malware.

Here’s a quick rundown of how it works:

  • Hackers purchase ad space on a legitimate website
  • The ad image they load contains code embedded in the image itself
  • The embedded code runs a JavaScript, which checks to see if Apple fonts are supported, and verifies that the device is an Apple of some kind
  • If the result of that query is positive, the script extracts the rest of the code from the image, which forces the user’s browser to navigate to a new URL as defined by the command code
  • The user arrives at a page displaying popup ads, most commonly urging the installation of an update for software, in most cases Adobe Flash Player

Of course, it’s not a Flash update at all, but whatever malware the hackers have seen fit to put in its place. It’s a nasty bit of trickery that so far, has managed to hijack more than five million web sessions, siphoning them away from legitimate sites. This is based on the latest research into the group’s activities, and worse, there’s no good way to guard against it except to be vigilant and watch the behavior of your web browser closely.

If your company uses Apple equipment, make sure your people are aware.  VeryMal has been stepping up their activities in recent weeks.

Used with permission from Article Aggregator

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