ALIASES:

TrojanSpy:Win32/Banbra.I (Microsoft); PWS-Banker!bok (McAfee); Infostealer.Bancos (Symantec); Trojan-Banker.Win32.Banbra.bpe, Trojan-Banker.Win32.Banbra.fle (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan.Generic.498576 (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: 4,603,904 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 18 May 2012

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.

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
MicrosoftUpgrade = "%Windows%\inetinfx.exe"

Other System Modifications

This spyware adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager\Accounts
AssociatedID = "{random values}"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Account Manager
Server ID = "4"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"

It modifies the following registry entries:

HKEY_CURRENT_USER\Identities
Last Username = "Main Identity"

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

HKEY_CURRENT_USER\Identities
Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"

(Note: The default value data of the said registry entry is {C0FE0177-5693-4537-9331-A7402AD82D40}.)

HKEY_CURRENT_USER\Identities
Identity Login = "9853"

(Note: The default value data of the said registry entry is 98053.)

HKEY_CURRENT_USER\Identities
Identity Ordinal = "2"

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

It deletes the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
Control

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
InprocServer32

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
Insertable

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
MiscStatus\1

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
MiscStatus

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
ProgID

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
Programmable

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
ToolboxBitmap32

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
TypeLib

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
Version

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\
VersionIndependentProgID

HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}

HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}\
InprocServer32

HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}\
ProgID

HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}\
Programmable

HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}\
TypeLib

HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}\
VersionIndependentProgID

HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}

Dropping Routine

This spyware drops the following files:

  • %Windows%\inidirx.ini

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

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

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

Restart in Safe Mode

[ Learn More ]

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\Windows\CurrentVersion\Run
    • MicrosoftUpgrade = "%Windows%\inetinfx.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager\Accounts
    • AssociatedID = "{random values}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Account Manager
    • Server ID = "4"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    • EnableFirewall = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile
    • DoNotAllowExceptions = "0"

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\Identities
    • From: Last Username = "Main Identity"
      To: Last Username = ""Main Identity""
  • In HKEY_CURRENT_USER\Identities
    • From: Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
      To: Last User ID = ""{C0FE0177-5693-4537-9331-A7402AD82D40}""
  • In HKEY_CURRENT_USER\Identities
    • From: Identity Login = "9853"
      To: Identity Login = ""98053""
  • In HKEY_CURRENT_USER\Identities
    • From: Identity Ordinal = "2"
      To: Identity Ordinal = ""1""

Step 5

Search and delete this file

[ Learn More ]
There may be some 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.
  • %Windows%\inidirx.ini

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BANCOS.SMCB. 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_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • Control
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • InprocServer32
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • Insertable
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}\MiscStatus
    • 1
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • MiscStatus
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • ProgID
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • Programmable
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • ToolboxBitmap32
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • TypeLib
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • Version
  • In HKEY_CLASSES_ROOT\CLSID\{2E3C3651-B19C-4DD9-A979-901EC3E930AF}
    • VersionIndependentProgID
  • In HKEY_CLASSES_ROOT\CLSID
    • {2E3C3651-B19C-4DD9-A979-901EC3E930AF}
  • In HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}
    • InprocServer32
  • In HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}
    • ProgID
  • In HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}
    • Programmable
  • In HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}
    • TypeLib
  • In HKEY_CLASSES_ROOT\CLSID\{3F888695-9B41-4B29-9F44-6B560E464A16}
    • VersionIndependentProgID
  • In HKEY_CLASSES_ROOT\CLSID
    • {3F888695-9B41-4B29-9F44-6B560E464A16}


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