X2KM_DLOADER.YYSVR

January 13, 2017
 Analysis by: Janus Agcaoili
 ALIASES:

W97M.Downloader.M (Symantec), TrojanDownloader:O97M/Donoff.CD (Microsoft), Trojan.MSWord.Agent.fp (Kaspersky)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

44,397 bytes

File Type:

XLSX

Memory Resident:

No

Initial Samples Received Date:

12 Jan 2017

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}tricina.com/087gbdv4

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.944.00

FIRST VSAPI PATTERN DATE:

06 Dec 2016

VSAPI OPR PATTERN File:

12.945.00

VSAPI OPR PATTERN Date:

07 Dec 2016

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as X2KM_DLOADER.YYSVR. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 3

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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