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TROJ_DLOAD.ABO

October 08, 2012
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data. It attempts to steal information, such as user names and passwords, used when logging into certain banking or finance-related websites.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

60,416 bytes

File Type:

PE

File Compression:

UPX

Memory Resident:

Yes

Initial Samples Received Date:

03 Mar 2011

Payload:

Steals information

Installation

This Trojan drops the following copies of itself into the affected system:

  • %User Profile%\Application Data\dayvz3ibtsunxzikoebl3pnuwqdxz2d2\csrss.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It creates the following folders:

  • %User Profile%\Application Data\dayvz3ibtsunxzikoebl3pnuwqdxz2d2

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "explorer.exe "%User Profile%\Application Data\dayvz3ibtsunxzikoebl3pnuwqdxz2d2\csrss.exe""

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

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft
setiasworld = "tt1etgfdonncprvv2fryswxaugczkdv"

It creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%malware path and name% = "%malware path and name%:*:Enabled:ldrsoft"

Information Theft

This Trojan monitors the Internet Explorer (IE) activities of the affected system, specifically the address bar or title bar. It recreates a legitimate website with a spoofed login page if a user visits banking sites with the following strings in the address bar or title bar:

  • bankofcyprus.com
  • boq.com.au
  • chase.com
  • cybersource.com
  • laiki.com
  • libertyreserve.com
  • lll.org.au
  • perfectmoney.com
  • railnet.railcu.org.au
  • sboff.com
  • schwab.com
  • scotiabank.com
  • secure.paymentech.com
  • suncorpbank.com.au

It attempts to steal sensitive online banking information, such as user names and passwords. This routine risks the exposure of the user's account information, which may then lead to the unauthorized use of the stolen data.

It attempts to steal information from the following banks and/or other financial institutions:

  • Bank of Cyprus
  • Bank of Queensland
  • Charles Schwab
  • Chase
  • Chase Paymentech
  • CyberSource
  • Liberty Reserve
  • Lutheran Laypeople’s League
  • Marfin Laiki Bank
  • Perfect Money
  • RailNet Internet Banking
  • Scotiabank
  • Standard Bank Offshore
  • Suncorp Bank

Other Details

This Trojan deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

8.900

FIRST VSAPI PATTERN FILE:

07.870.05

FIRST VSAPI PATTERN DATE:

03 Mar 2011

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

Identify and terminate files detected as TROJ_DLOAD.ABO

[ Learn More ]
  1. 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.
  2. 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\Microsoft
    • setiasworld = "tt1etgfdonncprvv2fryswxaugczkdv"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • %malware path and name% = "%malware path and name%:*:Enabled:ldrsoft"

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\Winlogon
    • From: Shell = "explorer.exe "%User Profile%\Application Data\dayvz3ibtsunxzikoebl3pnuwqdxz2d2\csrss.exe""
      To: Shell = "Explorer.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.
  • %User Profile%\Application Data\dayvz3ibtsunxzikoebl3pnuwqdxz2d2

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOAD.ABO. 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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