Malware in Ad-Based Images Targets Mac Users

guest · Jan 24, 2019

Malware in Ad-Based Images Targets Mac Users
January 23, 2019
https://threatpost.com/malware-in-ad-based-images-targets-mac-users/141115/

In the Mac campaign, a victim first comes across an ad harboring an image – however, in reality, JavaScript malware is hiding within the image-file code in the ad. Once clicked, the malicious ad infects the Mac user with the Shlayer trojan, which masquerades as a Flash upgrade and in turn redirects the victim to an adware installer.

“The perpetrators, as it turns out, have been active for months, but only recently have they begun to smuggle in the malware by way of steganography through the use of image coding,” researchers said in a Wednesday post detailing the campaign.

Little is known about the operator behind the attack, Stein said, except that researchers have dubbed the bad actor “VeryMal,” [...] “As malvertising detection continues to mature, sophisticated attackers are starting to learn that obvious methods of obfuscation are no longer getting the job done,” they said.
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Minimalist · Feb 13, 2019

Shlayer Malware Disables macOS Gatekeeper to Run Unsigned Payloads

A new variant of the multi-stage Shlayer malware known to target macOS users has been observed in the wild, now being capable to escalate privileges using a two-year-old technique and to disable the Gatekeeper protection mechanism to run unsigned second stage payloads.
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https://www.bleepingcomputer.com/ne...es-macos-gatekeeper-to-run-unsigned-payloads/

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Malware in Ad-Based Images Targets Mac Users

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