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TROJ_CVE20152545.BZS

October 20, 2016
 Analysis by: Jennifer Gumban
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Via email


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

It takes advantage of software vulnerabilities in certain software to drop malicious files.

  TECHNICAL DETAILS

File Size:

1,030,444 bytes

File Type:

DOCX

Memory Resident:

No

Initial Samples Received Date:

19 Oct 2016

Payload:

Drops files

Arrival Details

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

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\plugin.dll
  • %User Temp%\igfxe.exe
    • It connects to URL:
      http://{BLOCKED}industries.com/images/msoffice-updater.exe?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
    • It saves and executes the downloaded file as %User Temp%\mess.exe

It takes advantage of unknown vulnerabilities in the following software to drop malicious files:

Other Details

This Trojan does the following:

  • It displays an invoice while it executes an embedded Encapsulated PostScript Object that exhibits malicious activities.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.846.06

FIRST VSAPI PATTERN DATE:

19 Oct 2016

VSAPI OPR PATTERN File:

12.847.00

VSAPI OPR PATTERN Date:

20 Oct 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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • %User Temp%\plugin.dll
  • %User Temp%\igfxe.exe
  • %User Temp%\mess.exe

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_CVE20152545.BZS. 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 5

Download and apply this security patch Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.  Microsoft Security Bulletin MS15-099


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