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The New Phishing Attack Detected Using Multiple Malware Types

The New Phishing Attack Detected Using Multiple Malware Types

BRANDEFENSE
Security News
16/05/2022

Last updated on July 28th, 2022 at 12:34 am

A phishing campaign targeting Microsoft Windows users used three different types of malware designed to snatch sensitive information from targets.

The chain of attacks begins with sending spear-phishing emails containing a malicious Excel document to the targets, which appears to be a payment report notification from a trusted source. Emails try to persuade recipients to open the attached Excel document for report detail. When the Excel file called “Remittance-Details-951244.xlam” is opened, and the macro is activated, a VBA (Visual Basic Application) script called “Auto_Open()” is executed, which is responsible for downloading the malware to be used in the campaign.

As a result of a series of steps performed through Powershell and the stated VBA scripts, malicious software called AveMariaRAT, BitRAT, and PandoraHVNC, which is responsible for capturing users’ sensitive information, including passwords and bank information, is downloaded to the target system. BitRAT can take full control of infected Windows systems, monitor webcam activity, listen to audio over the microphone, allow threat actors to perform undetected transactions on compromised cryptocurrency wallets, and download additional malicious files, which is why it was considered particularly dangerous.

the excel file named "remittance-details-951244.xlam"
avemariarat, bitrat, and pandorahvnc

There are no details yet as to why the campaign involved three malware. Still, the three different types of malware distributed are known to increase the chances of threat actors accessing sensitive information they want to capture. In this context, to not be the target of similar attacks, it is recommended not to rely on emails, attachments, and links from unknown parties and to prefer comprehensive security solutions.

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