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. https://www.intego.com/mac-security-blog/verymal-mac-attack-hides-data-within-a-picture/
blog article
VERYMAL MAC ATTACK HIDES DATA WITHIN A PICTURE
A recent malware distribution campaign dubbed "VeryMal" leverages an ancient technique called steganography—the hiding of secret information in plain sight—to distribute Mac malware. The VeryMal campaign was caught distributing OSX/Shlayer, which was originally discovered by Intego researchers one year ago. What makes this malware campaign unique? Although the concept of steganography has been around for hundreds of years, it is not something we see in a lot of Mac malware campaigns. The VeryMal campaign used some cleverly crafted JavaScript code to look for secret information stored within a seemingly innocuous JPEG image file. The hidden data tells the site where to go to find the malware. Why go to all this trouble? In theory, using steganography or other obfuscation techniques makes it more difficult for endpoint protection and network monitoring software to determine that something suspicious might be happening. In practice, however, this tricky tactic does not prevent well-designed antivirus software like VirusBarrier X9 from keeping users safe. READ MORE