To get a one-glance comprehensive view of the behavior of this malware, refer to the Behavior Diagram shown below.


Malware Overview

This Trojan may be downloaded unknowingly by a user when visiting malicious Web sites.

It takes advantage of an unknown vulnerability in Microsoft Excel in order to drop malicious files detected by Trend Micro as the following:

• BKDR_PCCLIEN.BBB
• TROJ_SMALL.SYM

It then executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.



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