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PUA.Win32.VKontakteDJ.N

January 24, 2020
 ALIASES:

HEUR:AdWare.Win32.VKontakteDJ.gen (Kaspersky)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Potentially Unwanted Application 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:

5,266,488 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

24 Jan 2020

Arrival Details

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

Installation

This Potentially Unwanted Application adds the following processes:

  • "%System%\wscript.exe" %System Root%\ProgramData\gbkyqloixp.js
  • wscript %System Root%\ProgramData\gbkyqloixp.js

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

Other System Modifications

This Potentially Unwanted Application adds the following registry entries:

HKEY_CURRENT_USER\Software\VKDJ
exit = "1"

HKEY_CURRENT_USER\Software\VKDJ
dataIn = "{random characters}"

HKEY_CURRENT_USER\Software\VKDJ
data = "0"

HKEY_CURRENT_USER\Software\VKDJ
data = "The remote procedure call failed and did not execute. "

HKEY_CURRENT_USER\Software\VKDJ
data = ""

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\VKDJ\
data

HKEY_CURRENT_USER\Software\VKDJ\
exit

HKEY_CURRENT_USER\Software\VKDJ\
dataIn

Dropping Routine

This Potentially Unwanted Application drops the following files:

  • %All Users Profile%\gbkyqloixp.js

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • http://{BLOCKED}ates.com

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and terminate files detected as PUA.Win32.VKontakteDJ.N

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\VKDJ
    • exit = "1"
  • In HKEY_CURRENT_USER\Software\VKDJ
    • dataIn = "{random characters}"
  • In HKEY_CURRENT_USER\Software\VKDJ
    • data = "0"
  • In HKEY_CURRENT_USER\Software\VKDJ
    • data = "The remote procedure call failed and did not execute. "
  • In HKEY_CURRENT_USER\Software\VKDJ
    • data = ""

Step 4

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.
  • %All Users Profile%\gbkyqloixp.js

Step 5

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.VKontakteDJ.N. 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 the following Trend Micro Support pages for more information:

Step 6

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_CURRENT_USER\Software\VKDJ
    • data
  • In HKEY_CURRENT_USER\Software\VKDJ
    • exit
  • In HKEY_CURRENT_USER\Software\VKDJ
    • dataIn


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