This post was authored by Michael Gorelik and Josh Reynolds
Throughout this blog post we will be detailing a newly discovered RTF document family that is being leveraged by the FIN7 group (also known as the Carbanak gang) which is a financially-motivated group targeting the financial, hospitality, and medical industries. This document is used in phishing campaigns to execute a series of scripting languages containing multiple obfuscation mechanisms and advanced techniques to bypass traditional security mechanisms. The document contains messages enticing the user to click on an embedded object that executes scripts which are used to infect the system with an information stealing malware variant. This malware is then used to steal passwords from popular browsers and mail clients which are sent to remote nodes that are accessible to the attackers. These advanced mechanisms and the information stealing malware will be discussed in detail. We will also review a number of static and dynamic detection mechanisms used in the AMP for Endpoints and Threat Grid product lines to detect these document families.
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