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TSPY_BNCOS1.TOMA

October 31, 2012
 ALIASES:

Backdoor:Win32/Bandok (Microsoft); Trojan.Dropper (Symantec); Trojan-Banker.Win32.Banker.cjy (Kaspersky); Backdoor.Win32.Bandok (Sunbelt); ERROR (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:

4,367,588 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

31 Oct 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.

Installation

This spyware creates the following folders:

  • %User Temp%\nsz3.tmp
  • %Program Files%\LimeWire
  • %Program Files%\LimeWire\root
  • %Program Files%\LimeWire\root\magnet10
  • %Start Menu%\Programs\LimeWire
  • %Program Files%\LimeWire\.NetworkShare

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.)

Other System Modifications

This spyware deletes the following files:

  • %User Temp%\nsz1.tmp
  • %User Temp%\nsz3.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

It deletes the following folders:

  • %Program Files%\LimeWire\jre

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\LimeWire

HKEY_CLASSES_ROOT\magnet

HKEY_CLASSES_ROOT\magnet\DefaultIcon

HKEY_CLASSES_ROOT\magnet\shell

HKEY_CLASSES_ROOT\magnet\shell\
open

HKEY_CLASSES_ROOT\magnet\shell\
open\command

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire\Type

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\LimeWire
InstallDir = "%Program Files%\LimeWire"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
DisplayName = "LimeWire PRO 4.12.3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
UninstallString = "%Program Files%\LimeWire\uninstall.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
URLInfoAbout = "http://www.{BLOCKED}re.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
URLUpdateInfo = "http://www.{BLOCKED}re.com/update"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
Publisher = "Lime Wire, LLC"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
HelpLink = "http://www.{BLOCKED}re.com/support"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
LimeWire
DisplayVersion = "4.12.3"

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire
Description = "LimeWire is the best P2P client."

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire
DefaultIcon = "%Program Files%\LimeWire\LimeWire.ico,-128"

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire
ShellExecute = "%Program Files%\LimeWire\LimeWire.exe %URL"

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire
kt = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\
Handlers\LimeWire\Type
urn:sha1 = "0"

Dropping Routine

This spyware drops the following files:

  • %User Temp%\lime.exe
  • %User Temp%\limewirewin.exe
  • %User Temp%\nse2.tmp
  • %User Temp%\nsz3.tmp\LangDLL.dll
  • %User Temp%\nsz3.tmp\ioSpecial.ini
  • %User Temp%\nsz3.tmp\modern-wizard.bmp
  • %User Temp%\nsz3.tmp\modern-header.bmp
  • %User Temp%\nsz3.tmp\InstallOptions.dll
  • %User Temp%\nsz3.tmp\UserInfo.dll
  • %User Temp%\nsz3.tmp\FindProcDLL.dll
  • %User Temp%\nsz3.tmp\Banner.dll
  • %Program Files%\LimeWire\install.log
  • %User Temp%\jrestub.exe
  • %User Temp%\nsz3.tmp\nsisdl.dll
  • %User Temp%\Java Runtime Environment.7z
  • %Program Files%\LimeWire\COPYING
  • %Program Files%\LimeWire\GenericWindowsUtils.dll
  • %Program Files%\LimeWire\LimeWire.exe
  • %Program Files%\LimeWire\LimeWire.ico
  • %Program Files%\LimeWire\LimeWire.jar
  • %Program Files%\LimeWire\LimeWire20.dll
  • %Program Files%\LimeWire\MessagesBundle.properties
  • %Program Files%\LimeWire\MessagesBundles.jar
  • %Program Files%\LimeWire\ProgressTabs.jar
  • %Program Files%\LimeWire\SOURCE
  • %Program Files%\LimeWire\WindowsFirewall.dll
  • %Program Files%\LimeWire\WindowsV5PlusUtils.dll
  • %Program Files%\LimeWire\clink.jar
  • %Program Files%\LimeWire\commons-httpclient.jar
  • %Program Files%\LimeWire\commons-logging.jar
  • %Program Files%\LimeWire\commons-net.jar
  • %Program Files%\LimeWire\daap.jar
  • %Program Files%\LimeWire\data.ser
  • %Program Files%\LimeWire\donotremove.htm
  • %Program Files%\LimeWire\hashes
  • %Program Files%\LimeWire\i18n.jar
  • %Program Files%\LimeWire\icu4j.jar
  • %Program Files%\LimeWire\id3v2.jar
  • %Program Files%\LimeWire\jcraft.jar
  • %Program Files%\LimeWire\jl011.jar
  • %Program Files%\LimeWire\jmdns.jar
  • %Program Files%\LimeWire\log4j.jar
  • %Program Files%\LimeWire\log4j.properties
  • %Program Files%\LimeWire\looks.jar
  • %Program Files%\LimeWire\mp3sp14.jar
  • %Program Files%\LimeWire\pmf.ico
  • %Program Files%\LimeWire\spacer.gif
  • %Program Files%\LimeWire\themes.jar
  • %Program Files%\LimeWire\tritonus.jar
  • %Program Files%\LimeWire\update.ver
  • %Program Files%\LimeWire\vorbis.jar
  • %Program Files%\LimeWire\xerces.jar
  • %Program Files%\LimeWire\xml-apis.jar
  • %Program Files%\LimeWire\xml.war
  • %Program Files%\LimeWire\root\magnet10\badge.img
  • %Program Files%\LimeWire\root\magnet10\canHandle.img
  • %Program Files%\LimeWire\root\magnet10\limewire.gif
  • %Program Files%\LimeWire\root\magnet10\options.js
  • %Program Files%\LimeWire\root\magnet10\silentdetect.js
  • language.prop
  • %Start Menu%\Programs\LimeWire\Uninstall.lnk
  • %Desktop%\LimeWire PRO 4.12.3.lnk
  • %Start Menu%\Programs\LimeWire\LimeWire PRO 4.12.3.lnk
  • %Program Files%\LimeWire\LimeWire On Startup.lnk
  • %Program Files%\LimeWire\uninstall.exe
  • %User Temp%\jrelog.txt

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://java.{BLOCKED}n.com/{random path}

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.300

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

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_LOCAL_MACHINE\SOFTWARE
    • LimeWire
  • In HKEY_CLASSES_ROOT
    • magnet
  • In HKEY_CLASSES_ROOT\magnet
    • DefaultIcon
  • In HKEY_CLASSES_ROOT\magnet
    • shell
  • In HKEY_CLASSES_ROOT\magnet\shell
    • open
  • In HKEY_CLASSES_ROOT\magnet\shell\open
    • command
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • LimeWire
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • Magnet
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet
    • Handlers
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers
    • LimeWire
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers\LimeWire
    • Type

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_LOCAL_MACHINE\SOFTWARE\LimeWire
    • InstallDir = "%Program Files%\LimeWire"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • DisplayName = "LimeWire PRO 4.12.3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • UninstallString = "%Program Files%\LimeWire\uninstall.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • URLInfoAbout = "http://www.{BLOCKED}re.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • URLUpdateInfo = "http://www.{BLOCKED}re.com/update"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • Publisher = "Lime Wire, LLC"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • HelpLink = "http://www.{BLOCKED}re.com/support"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\LimeWire
    • DisplayVersion = "4.12.3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers\LimeWire
    • Description = "LimeWire is the best P2P client."
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers\LimeWire
    • DefaultIcon = "%Program Files%\LimeWire\LimeWire.ico,-128"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers\LimeWire
    • ShellExecute = "%Program Files%\LimeWire\LimeWire.exe %URL"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers\LimeWire
    • kt = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Magnet\Handlers\LimeWire\Type
    • urn:sha1 = "0"

Step 4

Search and delete these files

[ Learn More ]
There may be some component 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.
  • %User Temp%\lime.exe
  • %User Temp%\limewirewin.exe
  • %User Temp%\nse2.tmp
  • %User Temp%\nsz3.tmp\LangDLL.dll
  • %User Temp%\nsz3.tmp\ioSpecial.ini
  • %User Temp%\nsz3.tmp\modern-wizard.bmp
  • %User Temp%\nsz3.tmp\modern-header.bmp
  • %User Temp%\nsz3.tmp\InstallOptions.dll
  • %User Temp%\nsz3.tmp\UserInfo.dll
  • %User Temp%\nsz3.tmp\FindProcDLL.dll
  • %User Temp%\nsz3.tmp\Banner.dll
  • %Program Files%\LimeWire\install.log
  • %User Temp%\jrestub.exe
  • %User Temp%\nsz3.tmp\nsisdl.dll
  • %User Temp%\Java Runtime Environment.7z
  • %Program Files%\LimeWire\COPYING
  • %Program Files%\LimeWire\GenericWindowsUtils.dll
  • %Program Files%\LimeWire\LimeWire.exe
  • %Program Files%\LimeWire\LimeWire.ico
  • %Program Files%\LimeWire\LimeWire.jar
  • %Program Files%\LimeWire\LimeWire20.dll
  • %Program Files%\LimeWire\MessagesBundle.properties
  • %Program Files%\LimeWire\MessagesBundles.jar
  • %Program Files%\LimeWire\ProgressTabs.jar
  • %Program Files%\LimeWire\SOURCE
  • %Program Files%\LimeWire\WindowsFirewall.dll
  • %Program Files%\LimeWire\WindowsV5PlusUtils.dll
  • %Program Files%\LimeWire\clink.jar
  • %Program Files%\LimeWire\commons-httpclient.jar
  • %Program Files%\LimeWire\commons-logging.jar
  • %Program Files%\LimeWire\commons-net.jar
  • %Program Files%\LimeWire\daap.jar
  • %Program Files%\LimeWire\data.ser
  • %Program Files%\LimeWire\donotremove.htm
  • %Program Files%\LimeWire\hashes
  • %Program Files%\LimeWire\i18n.jar
  • %Program Files%\LimeWire\icu4j.jar
  • %Program Files%\LimeWire\id3v2.jar
  • %Program Files%\LimeWire\jcraft.jar
  • %Program Files%\LimeWire\jl011.jar
  • %Program Files%\LimeWire\jmdns.jar
  • %Program Files%\LimeWire\log4j.jar
  • %Program Files%\LimeWire\log4j.properties
  • %Program Files%\LimeWire\looks.jar
  • %Program Files%\LimeWire\mp3sp14.jar
  • %Program Files%\LimeWire\pmf.ico
  • %Program Files%\LimeWire\spacer.gif
  • %Program Files%\LimeWire\themes.jar
  • %Program Files%\LimeWire\tritonus.jar
  • %Program Files%\LimeWire\update.ver
  • %Program Files%\LimeWire\vorbis.jar
  • %Program Files%\LimeWire\xerces.jar
  • %Program Files%\LimeWire\xml-apis.jar
  • %Program Files%\LimeWire\xml.war
  • %Program Files%\LimeWire\root\magnet10\badge.img
  • %Program Files%\LimeWire\root\magnet10\canHandle.img
  • %Program Files%\LimeWire\root\magnet10\limewire.gif
  • %Program Files%\LimeWire\root\magnet10\options.js
  • %Program Files%\LimeWire\root\magnet10\silentdetect.js
  • language.prop
  • %Start Menu%\Programs\LimeWire\Uninstall.lnk
  • %Desktop%\LimeWire PRO 4.12.3.lnk
  • %Start Menu%\Programs\LimeWire\LimeWire PRO 4.12.3.lnk
  • %Program Files%\LimeWire\LimeWire On Startup.lnk
  • %Program Files%\LimeWire\uninstall.exe
  • %User Temp%\jrelog.txt

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.
  • %User Temp%\nsz3.tmp
  • %Program Files%\LimeWire
  • %Program Files%\LimeWire\root
  • %Program Files%\LimeWire\root\magnet10
  • %Start Menu%\Programs\LimeWire
  • %Program Files%\LimeWire\.NetworkShare

Step 6

Scan your computer with your Trend Micro product to delete files detected as TSPY_BNCOS1.TOMA. 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 this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\nsz1.tmp
  • %User Temp%\nsz3.tmp


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