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TROJ_VBKRYPT.XFR

June 13, 2016
 Analysis by: Mar Philip Elaurza
 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This spyware 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:

347,568 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Jun 2016

Arrival Details

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

Other System Modifications

This spyware adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Fav

HKEY_CURRENT_USER\Software\favorites

HKEY_CURRENT_USER\Software\favorites\
160303

HKEY_CLASSES_ROOT\360seURL\shell\
open\command

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
360se6

HKEY_CLASSES_ROOT\360ChromeURL\shell\
open\command

HKEY_CURRENT_USER\Software\Classes\
360ChromeURL\shell\open\
command

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\App Paths\
360chrome.exe

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
360Chrome

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
StartMenuInternet\360Chrome\shell\
open\command

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
StartMenuInternet\360chrome.exe\shell\
open\command

HKEY_CLASSES_ROOT\TheWorldChromeURL\DefaultIcon

HKEY_CLASSES_ROOT\TheWorld6\DefaultIcon

HKEY_CURRENT_USER\Software\TheWorld6

HKEY_CURRENT_USER\Software\TheWorld Chrome\
chrome

HKEY_CLASSES_ROOT\hao123chprogid\Shell\
open\command

HKEY_CURRENT_USER\Software\hao123JuziBrowser

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
StartMenuInternet\hao123Juzi.exe\shell\
open\command

HKEY_CLASSES_ROOT\Applications\Juzi.exe\
shell\open\command

HKEY_CURRENT_USER\Software\JuziBrowser

HKEY_LOCAL_MACHINE\SOFTWARE\Clients\
StartMenuInternet\Juzi.exe\shell\
open\command

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Fav
Flag = "1"

Dropping Routine

This spyware drops the following files:

  • %Favorites%\[hao123].url

(Note: %Favorites% is the Favorites folder, where it usually is C:\Documents and Settings\{user name}\Favorites on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Favorites on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://i.{BLOCKED}ankan.com/downloads/favorites.txt

  SOLUTION

Minimum Scan Engine:

9.8

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

Delete this registry key

[ 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_LOCAL_MACHINE\SOFTWARE
    • Fav
  • In HKEY_CURRENT_USER\Software
    • favorites
  • In HKEY_CURRENT_USER\Software\favorites
    • 160303
  • In HKEY_CLASSES_ROOT\360seURL\shell\open
    • command
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • 360se6
  • In HKEY_CLASSES_ROOT\360ChromeURL\shell\open
    • command
  • In HKEY_CURRENT_USER\Software\Classes\360ChromeURL\shell\open
    • command
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\App Paths
    • 360chrome.exe
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • 360Chrome
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\360Chrome\shell\open
    • command
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\360chrome.exe\shell\open
    • command
  • In HKEY_CLASSES_ROOT\TheWorldChromeURL
    • DefaultIcon
  • In HKEY_CLASSES_ROOT\TheWorld6
    • DefaultIcon
  • In HKEY_CURRENT_USER\Software
    • TheWorld6
  • In HKEY_CURRENT_USER\Software\TheWorld Chrome
    • chrome
  • In HKEY_CLASSES_ROOT\hao123chprogid\Shell\open
    • command
  • In HKEY_CURRENT_USER\Software
    • hao123JuziBrowser
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\hao123Juzi.exe\shell\open
    • command
  • In HKEY_CLASSES_ROOT\Applications\Juzi.exe\shell\open
    • command
  • In HKEY_CURRENT_USER\Software
    • JuziBrowser
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Clients\StartMenuInternet\Juzi.exe\shell\open
    • command

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_LOCAL_MACHINE\SOFTWARE\Fav
    • Flag = "1"

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %Favorites%\[hao123].url

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_VBKRYPT.XFR. 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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