Analysis by: Christopher Daniel So
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 303,200 bytes
File Type: DLL
Memory Resident: Yes
Initial Samples Received Date: 01 May 2012

Arrival Details

This Trojan may be dropped by other malware.

Autostart Technique

This Trojan adds the following registry keys to install itself as a Browser Helper Object (BHO):

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{60972418-8A4B-B5CC-3C3D-0587F39623FF}

The scheduled task executes the malware at the following period:

  • Every day at 2:04 pm

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{60972418-8A4B-B5CC-3C3D-0587F39623FF}

HKEY_CLASSES_ROOT\Qjvuhsdv

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost\
netsvcs

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
ShellIconOverlayIdentifiers\Enhanced Storage

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom

It adds the following registry entries:

HKEY_CLASSES_ROOT\CLSID\{60972418-8A4B-B5CC-3C3D-0587F39623FF}\
InprocServer32
(Default) = "{malware path and file name}"

HKEY_CLASSES_ROOT\CLSID\{60972418-8A4B-B5CC-3C3D-0587F39623FF}\
ProgID
(Default) = "Qjvuhsdv"

HKEY_CLASSES_ROOT\Qjvuhsdv\CLSID
(Default) = "{60972418-8A4B-B5CC-3C3D-0587F39623FF}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
ShellIconOverlayIdentifiers\Enhanced Storage
(Default) = "{60972418-8A4B-B5CC-3C3D-0587F39623FF}"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
ImagePath = "%SystemRoot%\System32\svchost.exe -k netsvcs"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
Description = "Helper for PCI Bus"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
DisplayName = "PCI Bus Helper"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
ObjectName = "LocalSystem"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
Start = "2"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom
Type = "20"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom\Parameters
ServiceDll = "{malware path and file name}"

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\qearydom\Parameters
ServiceMain = "DllRegisterServer"

HKEY_CLASSES_ROOT\CLSID\{60972418-8A4B-B5CC-3C3D-0587F39623FF}
Version = "64"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SystemRestore
DisableSR = "0"

(Note: The default value data of the said registry entry is 1.)

  SOLUTION

Minimum Scan Engine: 9.200
VSAPI OPR PATTERN File: 8.961.00
VSAPI OPR PATTERN Date: 02 May 2012

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

Restart in Safe Mode

[ Learn More ]

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
    • {60972418-8A4B-B5CC-3C3D-0587F39623FF}
  • In HKEY_CLASSES_ROOT
    • Qjvuhsdv
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
    • netsvcs
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects
    • {60972418-8A4B-B5CC-3C3D-0587F39623FF}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers
    • Enhanced Storage
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
    • qearydom

Step 4

Restore this modified 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\Microsoft\Windows NT\CurrentVersion\SystemRestore
    • From: DisableSR = "0"
      To: DisableSR = "1"

Step 5

To delete the added job file:

  1. Click on Start>Programs>Accessories>System Tools>Scheduled Tasks
  2. Double-click on a job file.
  3. Check if the malware path and file name is in the Run: box.
  4. If it does, delete the job file.
  5. Repeat step 2-4 for the remaining job files.

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_BOAXXE.LY. 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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