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TSPY_BANCOS.SMZ

October 05, 2013
 ALIASES:

TrojanDownloader:Win32/Renos.DU (Microsoft); [0000e9b0.EXE]:FakeAlert-GS (McAfee); Trojan.Dropper (Symantec); Trojan-Downloader.Win32.BHO.abu (Kaspersky); Trojan-Downloader.Win32.Renos.gl (v), Fraudtool.Win32.WinDefender2009 (v) (Sunbelt); Trojan horse SHeur2.FUX (AVG)

 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:

96,775 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Oct 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.

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\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Bind

HKEY_CLASSES_ROOT\LKKnsbn.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
LKKnsbn.1\CLSID

HKEY_CLASSES_ROOT\LKKnsbn

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
LKKnsbn\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
LKKnsbn\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}\TypeLib

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Bind
comment2 = "3912231"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}\TypeLib
Version = "1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}\TypeLib
Version = "1.0"

Dropping Routine

This spyware drops the following files:

  • %System%\knzg.dll
  • %Windows%\ios.dat
  • %System%\p.ico
  • %Desktop%\SMS TRAP.url
  • %Favorites%\SMS TRAP.url
  • %Start Menu%\SMS TRAP.url
  • %System%\sf.ico
  • %Desktop%\Cheap Software.url
  • %Favorites%\Cheap Software.url
  • %Start Menu%\Cheap Software.url
  • %System%\c.ico
  • %Desktop%\VIP Casino.url
  • %Favorites%\VIP Casino.url
  • %Start Menu%\VIP Casino.url
  • %System%\m.ico
  • %Desktop%\Cheap Pharmacy Online.url
  • %Favorites%\Cheap Pharmacy Online.url
  • %Start Menu%\Cheap Pharmacy Online.url
  • %System%\m3.ico
  • %Desktop%\MP3 Download.url
  • %Favorites%\MP3 Download.url
  • %Start Menu%\MP3 Download.url
  • %System%\s.ico
  • %Desktop%\Search Online.url
  • %Favorites%\Search Online.url
  • %Start Menu%\Search Online.url

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Windows% is the Windows folder, which is usually C:\Windows.. %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %Favorites% is the current user's Favorites folder, which is usually C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Favorites on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

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

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_CURRENT_USER\Software\Microsoft
    • Bind
  • In HKEY_CLASSES_ROOT
    • LKKnsbn.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\LKKnsbn.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • LKKnsbn
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\LKKnsbn
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\LKKnsbn
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {A8954909-1F0F-41A5-A7FA-3B376D69E226}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A8954909-1F0F-41A5-A7FA-3B376D69E226}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {B32E258A-8ADE-4DAD-92F9-476A81824D6F}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {1E89B621-A273-4318-88D3-BA90C271A29A}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}
    • TypeLib

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_CURRENT_USER\Software\Microsoft\Bind
    • comment2 = "3912231"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{46CFEC0B-CA28-4C82-BD91-EF9C6AE197B5}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{B32E258A-8ADE-4DAD-92F9-476A81824D6F}\TypeLib
    • Version = "1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{1E89B621-A273-4318-88D3-BA90C271A29A}\TypeLib
    • Version = "1.0"

Step 5

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %System%\knzg.dll
  • %Windows%\ios.dat
  • %System%\p.ico
  • %Desktop%\SMS TRAP.url
  • %Favorites%\SMS TRAP.url
  • %Start Menu%\SMS TRAP.url
  • %System%\sf.ico
  • %Desktop%\Cheap Software.url
  • %Favorites%\Cheap Software.url
  • %Start Menu%\Cheap Software.url
  • %System%\c.ico
  • %Desktop%\VIP Casino.url
  • %Favorites%\VIP Casino.url
  • %Start Menu%\VIP Casino.url
  • %System%\m.ico
  • %Desktop%\Cheap Pharmacy Online.url
  • %Favorites%\Cheap Pharmacy Online.url
  • %Start Menu%\Cheap Pharmacy Online.url
  • %System%\m3.ico
  • %Desktop%\MP3 Download.url
  • %Favorites%\MP3 Download.url
  • %Start Menu%\MP3 Download.url
  • %System%\s.ico
  • %Desktop%\Search Online.url
  • %Favorites%\Search Online.url
  • %Start Menu%\Search Online.url

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_BANCOS.SMZ. 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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