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BlueNoroff: New Malware Attacking MacOS Users

Researchers have uncovered a new Trojan-attacking macOS user that is associated with the BlueNoroff APT group and their ongoing RustBucket campaign.
As a subgroup of Lazarus, BlueNoroff possesses reverse engineering expertise because they spend time analyzing and patching SWIFT Alliance software as well as breaking apart legitimate software to uncover ways to steal a significant amount of money.
This financially driven threat actor targets ATMs, POST software and cryptocurrency businesses, banks, casinos, and fin-tech organizations.
Major financial attacks, such as the theft of the Bangladesh Central Bank, were associated with this actor.
The new loader variation was initially mentioned in a post on X. A malicious payload was disseminated via earlier RustBucket versions using an app that pretended to be a PDF viewer.
According to researchers, it's unclear exactly how the archive spread. The targets may have received an email from the criminals, similar to previous attacks.
At the time of discovery, the app's signature was still valid, but the certificate has since expired.
The main function, CalculateExtameGCD, is responsible for decrypting the XOR-encrypted payload. The app attempts to reduce the analyst's attention by sending irrelevant notifications to the terminal while the decryption procedure is underway.
The.pw file is a Trojan that was discovered; it is a universal format file, just like the loader.
During the investigation, researchers did not get a single command from the server, which prevented them from learning the content for the next attack phase.
The majority of anti-malware programs can identify the Trojan.


This Cyber News was published on gbhackers.com. Publication date: Wed, 06 Dec 2023 16:43:05 +0000


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