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TSPY_BANKER.YOUX

August 18, 2014
 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

486,992 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

18 Aug 2014

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.

Installation

This spyware creates the following folders:

  • %Application Data%\weblink

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\SOFTWARE\mopop

HKEY_CURRENT_USER\SOFTWARE\wsinfo

HKEY_CURRENT_USER\SOFTWARE\mopop\
wsd\20140804

HKEY_CURRENT_USER\SOFTWARE\mopop\
date\20140804

HKEY_CURRENT_USER\Software\WindowsTab2\
data

HKEY_CURRENT_USER\Software\weblink

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
FrameMerging = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
SessionMerging = "0"

HKEY_CURRENT_USER\Software\mopop
dstate = "1"

HKEY_CURRENT_USER\Software\mopop
wsview = "0"

HKEY_CURRENT_USER\Software\mopop
dayview = "0"

HKEY_CURRENT_USER\Software\WindowsTab2\
data
windowstab.exe = "2013073101"

HKEY_CURRENT_USER\Software\weblink
sendlog = "20140804"

HKEY_CURRENT_USER\Software\weblink
dver = "2014-07-30 15:25:00"

Dropping Routine

This spyware drops the following files:

  • %System Root%\searchopen3.dll
  • %System Root%\windowstab.dll
  • %User Temp%\140E.tmp
  • %Application Data%\weblink\wblinkies.exe
  • %Application Data%\weblink\weblinkup.exe
  • %Application Data%\weblink\weblkun.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://www.{BLOCKED}k.co.kr/app/windowstab/windowstab.php?{random characters}
  • http://www.{BLOCKED}penpop.com/xml/wscheck.txt
  • http://www.{BLOCKED}penpop.com/xml/mopop1.html
  • http://{BLOCKED}.93.45/~paran/winsearch/opensearch3.html
  • http://www.{BLOCKED}penpop.com/com/tinst.php?{random characters}
  • http://www.{BLOCKED}penpop.com/com/tact.php?{random characters}
  • {BLOCKED}.182.171
  • {BLOCKED}0.1
  • {BLOCKED}2.241.98
  • {BLOCKED}.26.109
  • {BLOCKED}.59.55

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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_CURRENT_USER\SOFTWARE
    • mopop
  • In HKEY_CURRENT_USER\SOFTWARE
    • wsinfo
  • In HKEY_CURRENT_USER\SOFTWARE\mopop\wsd
    • 20140804
  • In HKEY_CURRENT_USER\SOFTWARE\mopop\date
    • 20140804
  • In HKEY_CURRENT_USER\Software\WindowsTab2
    • data
  • In HKEY_CURRENT_USER\Software
    • weblink

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\Microsoft\Internet Explorer\Main
    • FrameMerging = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • SessionMerging = "0"
  • In HKEY_CURRENT_USER\Software\mopop
    • dstate = "1"
  • In HKEY_CURRENT_USER\Software\mopop
    • wsview = "0"
  • In HKEY_CURRENT_USER\Software\mopop
    • dayview = "0"
  • In HKEY_CURRENT_USER\Software\WindowsTab2\data
    • windowstab.exe = "2013073101"
  • In HKEY_CURRENT_USER\Software\weblink
    • sendlog = "20140804"
  • In HKEY_CURRENT_USER\Software\weblink
    • dver = "2014-07-30 15:25:00"

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.
  • %System Root%\searchopen3.dll
  • %System Root%\windowstab.dll
  • %User Temp%\140E.tmp
  • %Application Data%\weblink\wblinkies.exe
  • %Application Data%\weblink\weblinkup.exe
  • %Application Data%\weblink\weblkun.exe

Step 5

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Application Data%\weblink

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.YOUX. 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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