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VBS_SWRORT.SZT

March 30, 2016
 Analysis by: Rhena Inocencio
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


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

  TECHNICAL DETAILS

File Size:

1,385 bytes

File Type:

VBS

Initial Samples Received Date:

24 Mar 2016

Arrival Details

This Trojan 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 requires the existence of the following files to properly run:

  • %Temp%\qGZEb.b64

(Note: %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.)

It does the following:

  • It opens and decrypts the following file:
    • %Temp%\qGZEb.b64 - detected as TROJ_SWRORT.TBU
  • It saves the decrypted binary as follows:
    • %Temp%\WuEYG.exe - detected as TROJ_SWRORT.TBU
  • It then executes %Temp%\WuEYG.exe

(Note: %Temp% is the Windows temporary folder, where it usually is C:\Windows\Temp on all Windows operating system versions.)

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.426.01

FIRST VSAPI PATTERN DATE:

24 Mar 2016

VSAPI OPR PATTERN File:

12.427.00

VSAPI OPR PATTERN Date:

25 Mar 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

Remove the malware/grayware file dropped/downloaded by VBS_SWRORT.SZT. (Note: Please skip this step if the threat(s) listed below have already been removed.)

     
    • TROJ_SWRORT.TBU

Step 4

Scan your computer with your Trend Micro product to delete files detected as VBS_SWRORT.SZT. 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.


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