2/24: Mdropper.XR Trojan Exploits Zero-Day Flaw in Versions of Office

Troj_Mdropper.XR is the Trend Micro detection for a specially crafted MS Excel file that exploits a zero-day vulnerability in certain Microsoft Office Versions. They are:

Microsoft Office 2000 Service Pack 3

Microsoft Office 2003 Service Pack 1 or Service Pack 2

Microsoft Office XP Service Pack 3

It may be dropped by other malware. It may also be downloaded unknowingly by a user when visiting malicious Web site(s).

Upon execution and the subsequent exploit of the affected system, this Trojan drops and executes BKDR_AGENT.FAX in the current user's Temporary folder.

As a result, the routines of the dropped backdoor are exhibited on the affected system.

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