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TSPY_BANKER.QKH

October 12, 2012
 ALIASES:

TrojanSpy:Win32/Banker.AAJ (Microsoft); Generic PWS.vi (McAfee); Trojan-Dropper.Win32.Delf.jpp (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Gen:Variant.Delf.20 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • 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:

134,144 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

20 Nov 2011

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:

  • %Windows%\TMP

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Autostart Technique

This spyware registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{F12C6330-5585-4DE6-8650-8C11285AA2C1}

Other System Modifications

This spyware adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{F12C6330-5585-4DE6-8650-8C11285AA2C1}

HKEY_CLASSES_ROOT\CLSID\{F12C6330-5585-4DE6-8650-8C11285AA2C1}\
InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Policies\
Ext\CLSID

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{F12C6330-5585-4DE6-8650-8C11285AA2C1}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{F12C6330-5585-4DE6-8650-8C11285AA2C1}
NoExplorer = 1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
Ext\CLSID
{F12C6330-5585-4DE6-8650-8C11285AA2C1} = "1"

Dropping Routine

This spyware drops the following files:

  • %User Temp%\DOSDJSMBATMAN.cpl
  • %Windows%\wucps.dll
  • %Windows%\xwregc.dll
  • %Windows%\wmpi.dll

(Note: %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.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://movs.{BLOCKED}m.br/img/js/wucps.js

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Close all opened browser windows

Step 3

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_CLASSES_ROOT\CLSID
    • {F12C6330-5585-4DE6-8650-8C11285AA2C1}
  • In HKEY_CLASSES_ROOT\CLSID\{F12C6330-5585-4DE6-8650-8C11285AA2C1}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Ext
    • CLSID

Step 4

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\Classes\CLSID\{F12C6330-5585-4DE6-8650-8C11285AA2C1}\InprocServer32
    • ThreadingModel="Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{F12C6330-5585-4DE6-8650-8C11285AA2C1}
    • NoExplorer=1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Ext\CLSID
    • {F12C6330-5585-4DE6-8650-8C11285AA2C1}="1"

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. %Windows%\TMP

Step 6

Search and delete these files

[ Learn More ]
There may be some component 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%\DOSDJSMBATMAN.cpl
  • %Windows%\wucps.dll
  • %Windows%\xwregc.dll
  • %Windows%\wmpi.dll

Step 7

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