Hackers Target macOS Users with Malicious Ads Spreading Stealer Malware | Cybersecurity

Mar 30, 2024. NewsroomMalware / Cryptocurrency.

Malicious ads and bogus websites are acting as a conduit to deliver two different stealer malware, including Atomic Stealer, targeting Apple macOS users.

The ongoing infostealer attacks targeting macOS users may have adopted different methods to compromise victims’ Macs, but operate with the end goal of stealing sensitive data, Jamf Threat Labs said in a report published Friday.

One such attack chain targets users searching for Arc Browser on search engines like Google to serve bogus ads that redirect users to look-alike sites (“airci[.]net”) that serve the malware.

“Interestingly, the malicious website cannot be accessed directly, as it returns an error,” security researchers Jaron Bradley, Ferdous Saljooki, and Maggie Zirnhelt said. “It can only be accessed through a generated sponsored link, presumably to evade detection.”

The disk image file downloaded from the counterfeit website (“ArcSetup.dmg”) delivers Atomic Stealer, which is known to request users to enter their system passwords via a fake prompt and ultimately facilitate information theft.

Jamf said it also discovered a phony website called meethub[.]gg that claims to offer a free group meeting scheduling software, but actually installs another stealer malware capable of harvesting users’ keychain data, stored credentials in web browsers, and information from cryptocurrency wallets.

Much like Atomic stealer, the malware – which is said to overlap with a Rust-based stealer family known as Realst – also prompts the user for their macOS login password using an AppleScript call to carry out its malicious actions.

Attacks leveraging this malware are said to have approached victims under the pretext of discussing job opportunities and interviewing them for a podcast, subsequently asking them to download an app from meethub[.]gg to join a video conference provided in the meeting invites.

“These attacks are often focused on those in the crypto industry…

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