TSPY_BANKER.INL

February 05, 2013
 ALIASES:

TrojanDownloader:Win32/Banload.gen!C (Microsoft); PWS-Banker (McAfee); Infostealer.Bancos (Symantec); Trojan-Banker.Win32.Banker.riu (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.2142025 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 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:

2,723,328 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Feb 2013

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:

  • %System Root%\Arquivos de programas
  • %System Root%\Arquivos de programas\Microsoft Office
  • %System Root%\Arquivos de programas\Microsoft Office\Office
  • %System Root%\Arquivos de programas\Microsoft Office\Office\bots
  • %System Root%\Arquivos de programas\Microsoft Office\Office\bots\msg

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Microsoft Internet Explorer

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Enable Browser Extensions = "no"

HKEY_CURRENT_USER\Microsoft Internet Explorer
SecChangeSettings = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Use FormSuggest = "no"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
FormSuggest Passwords = "no"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
FormSuggest PW Ask = "no"

HKEY_CURRENT_USER\Microsoft Internet Explorer
AutoSuggest = "no"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1001 = "3"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1004 = "3"

(Note: The default value data of the said registry entry is 3.)

It deletes the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Toolbar

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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
    • Microsoft Internet Explorer

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
    • Enable Browser Extensions = "no"
  • In HKEY_CURRENT_USER\Microsoft Internet Explorer
    • SecChangeSettings = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • Use FormSuggest = "no"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • FormSuggest Passwords = "no"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • FormSuggest PW Ask = "no"
  • In HKEY_CURRENT_USER\Microsoft Internet Explorer
    • AutoSuggest = "no"

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
    • From: 1001 = "3"
      To: 1001 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
    • From: 1004 = "3"
      To: 1004 = ""3""

Step 5

Search and delete these folders

[ 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.
  • %System Root%\Arquivos de programas
  • %System Root%\Arquivos de programas\Microsoft Office
  • %System Root%\Arquivos de programas\Microsoft Office\Office
  • %System Root%\Arquivos de programas\Microsoft Office\Office\bots
  • %System Root%\Arquivos de programas\Microsoft Office\Office\bots\msg

Step 6

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

Step 7

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer
    • Toolbar


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