TA575 Uses Squid Game Lures to Distribute Dridex malware

Analysts observed thousands of emails targeting all industries primarily in the United States. The emails used subjects such as:

Squid Game is back, watch new season before anyone else.
Invite for Customer to access the new sesason. [sic]
Squid game new season commercials casting preview
Squid game scheduled season commercials talent cast schedule

The emails tell the victim to fill out either an attached document to get early access to the new season of the show or a talent form to become part of the background casting.
The attachments are Excel documents with macros that, if enabled, will download the Dridex banking trojan affiliate id “22203” from Discord URLs. Dridex is a prolific banking trojan distributed by multiple affiliates that can lead to data theft and installation of follow-on malware such as ransomware.

TA575 is a Dridex affiliate that distributes malware via malicious URLs, Microsoft Office attachments, and password-protected files. On average, TA575 sends thousands of emails per campaign impacting hundreds of organizations. TA575 also uses the Discord content delivery network (CDN) to host and distribute Dridex. Discord, a communications platform with consumer and enterprise uses, is an increasingly popular malware hosting service for cybercriminals.

TA575 themes generally include invoicing and payments, but occasionally include popular news, events, and cultural references. Cybercriminal threat actors in general have pounced on Squid Game as a popular lure and malware theme.
This makes sense; as Squid Game is Netflix’s “biggest ever” series, the pool of potential victims who would inadvertently interact with malicious content associated with it is higher than a general lure theme. TA575 is betting the invitation to be part of the upcoming season will entice more users to interact with the malicious Microsoft Excel file.

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