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TROJ_VB.LSY

October 13, 2012
 ALIASES:

Trojan:Win32/Dynamer!dtc, Trojan:Win32/Dynamer!dtc (Microsoft); Trojan.ADH (Symantec); ARC:NSIS, ARC:[$TEMP\hctpro441.exe]:Inno, ARC:[$TEMP\hctpro441.exe/data0002]:CHM, PAK:[$TEMP\hctpro4 (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); MemScan:Trojan.Generic.6882430 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan 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:

1,858,560 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

13 Jun 2012

Arrival Details

This Trojan 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 Trojan creates the following folders:

  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\ADMINI~1
  • %User Profile%\LOCALS~1
  • %User Temp%\nsz3.tmp
  • %User Temp%\is-R5A6J.tmp
  • %User Temp%\is-J144P.tmp
  • %User Temp%\is-J144P.tmp\_isetup
  • %Program Files%\Hot CPU Tester Pro 4
  • %Start Menu%\Programs\Hot CPU Tester Pro 4
  • %User Temp%\nsk6.tmp
  • %User Temp%\nsb9.tmp
  • %User Temp%\nsbC.tmp
  • %User Temp%\nsbC.tmp\downloads

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

  • %User Temp%\nsk1.tmp
  • %User Temp%\nsz3.tmp
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Hot CPU Tester Pro 4.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Hot CPU Tester Pro 4.url
  • %Desktop%\Hot CPU Tester Pro.pif
  • %Desktop%\Hot CPU Tester Pro.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Help.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Help.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Uninstall Hot CPU Tester Pro 4.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Uninstall Hot CPU Tester Pro 4.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\License Agreement.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\License Agreement.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\changes.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\changes.url
  • %User Temp%\nsk4.tmp
  • %User Temp%\nsk6.tmp
  • %User Temp%\nsb7.tmp
  • %User Temp%\nsb9.tmp
  • %User Temp%\nsmA.tmp
  • %User Temp%\nsbC.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.. %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.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1

HKEY_CURRENT_USER\Software\Temp\
7

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
Inno Setup: Setup Version = "5.1.12"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
Inno Setup: App Path = "%Program Files%\Hot CPU Tester Pro 4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
InstallLocation = "%Program Files%\Hot CPU Tester Pro 4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
Inno Setup: Icon Group = "Hot CPU Tester Pro 4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
Inno Setup: User = "Administrator"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
DisplayName = "Hot CPU Tester Pro 4.4.1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
DisplayIcon = "%Program Files%\Hot CPU Tester Pro 4\Hot CPU Tester.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
UninstallString = "%Program Files%\Hot CPU Tester Pro 4\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
QuietUninstallString = "%Program Files%\Hot CPU Tester Pro 4\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
DisplayVersion = "4.4"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
Publisher = "7Byte Computers"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
URLInfoAbout = "http://www.{BLOCKED}e.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
HelpLink = "http://www.{BLOCKED}e.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
InstallDate = "20120428"

HKEY_CURRENT_USER\Software\Temp\
7
7 = "http://www.{BLOCKED}e.net/88_P"

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\nsz2.tmp
  • %User Temp%\hctpro441.exe
  • %User Temp%\P.exe
  • %User Temp%\is-R5A6J.tmp\is-3RU1D.tmp
  • %User Temp%\is-J144P.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-J144P.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Hot CPU Tester Pro 4\unins000.dat
  • %Program Files%\Hot CPU Tester Pro 4\is-L6P82.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-I011N.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-N07G9.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-B1D0B.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-MNAKS.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-11HGR.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-00P6V.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-7C28N.tmp
  • %Windows%\is-KB4HR.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-NG10M.tmp
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Hot CPU Tester Pro 4.lnk
  • %Desktop%\Hot CPU Tester Pro.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Help.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Uninstall Hot CPU Tester Pro 4.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\License Agreement.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\changes.lnk
  • %User Temp%\nsk5.tmp
  • %User Temp%\WinInstall.exe
  • %User Temp%\nsb8.tmp
  • %User Temp%\willwnd.exe
  • %User Temp%\stb1.exe
  • %User Temp%\nsmB.tmp
  • %User Temp%\nsbC.tmp\System.dll
  • %User Temp%\nsbC.tmp\blowfish.dll
  • %User Temp%\nsbC.tmp\nswg.dll
  • %User Temp%\nsbC.tmp\Final.html
  • %User Temp%\nsbC.tmp\Components.html
  • %User Temp%\nsbC.tmp\Background.png
  • %User Temp%\nsbC.tmp\welcomepage.html
  • %User Temp%\nsbC.tmp\welcomepage_noadw.html
  • %User Temp%\nsbC.tmp\welcomebg.gif
  • %User Temp%\nsbC.tmp\button.gif
  • %User Temp%\nsbC.tmp\button-active.gif
  • %User Temp%\nsbC.tmp\Components_noadw.html
  • %User Temp%\nsbC.tmp\bg-grey-wrapper.gif
  • %User Temp%\nsbC.tmp\bg-button.gif
  • %User Temp%\nsbC.tmp\bg.gif
  • %User Temp%\nsbC.tmp\bg-container.gif
  • %User Temp%\nsbC.tmp\button-inactive.gif
  • %User Temp%\nsbC.tmp\Progress.dll
  • %User Temp%\nsbC.tmp\Install.html
  • %User Temp%\nsbC.tmp\InetLoadEx.dll
  • %User Temp%\nsbC.tmp\downloads\74937.ex_
  • %User Temp%\nsbC.tmp\downloads\81812.ex_

(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.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %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 Trojan connects to the following possibly malicious URL:

  • http://mn.{BLOCKED}n.biz/get.php?aff=88_P

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

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\Microsoft\Windows\CurrentVersion\Uninstall
    • {BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
  • In HKEY_CURRENT_USER\Software\Temp
    • 7

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\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • Inno Setup: Setup Version = "5.1.12"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • Inno Setup: App Path = "%Program Files%\Hot CPU Tester Pro 4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • InstallLocation = "%Program Files%\Hot CPU Tester Pro 4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • Inno Setup: Icon Group = "Hot CPU Tester Pro 4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • Inno Setup: User = "Administrator"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • DisplayName = "Hot CPU Tester Pro 4.4.1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • DisplayIcon = "%Program Files%\Hot CPU Tester Pro 4\Hot CPU Tester.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • UninstallString = "%Program Files%\Hot CPU Tester Pro 4\unins000.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • QuietUninstallString = "%Program Files%\Hot CPU Tester Pro 4\unins000.exe /SILENT"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • DisplayVersion = "4.4"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • Publisher = "7Byte Computers"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • URLInfoAbout = "http://www.{BLOCKED}e.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • HelpLink = "http://www.{BLOCKED}e.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1
    • InstallDate = "20120428"
  • In HKEY_CURRENT_USER\Software\Temp\7
    • 7 = "http://www.{BLOCKED}e.net/88_P"

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%\nsz2.tmp
  • %User Temp%\hctpro441.exe
  • %User Temp%\P.exe
  • %User Temp%\is-R5A6J.tmp\is-3RU1D.tmp
  • %User Temp%\is-J144P.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-J144P.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Hot CPU Tester Pro 4\unins000.dat
  • %Program Files%\Hot CPU Tester Pro 4\is-L6P82.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-I011N.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-N07G9.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-B1D0B.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-MNAKS.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-11HGR.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-00P6V.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-7C28N.tmp
  • %Windows%\is-KB4HR.tmp
  • %Program Files%\Hot CPU Tester Pro 4\is-NG10M.tmp
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Hot CPU Tester Pro 4.lnk
  • %Desktop%\Hot CPU Tester Pro.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Help.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Uninstall Hot CPU Tester Pro 4.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\License Agreement.lnk
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\changes.lnk
  • %User Temp%\nsk5.tmp
  • %User Temp%\WinInstall.exe
  • %User Temp%\nsb8.tmp
  • %User Temp%\willwnd.exe
  • %User Temp%\stb1.exe
  • %User Temp%\nsmB.tmp
  • %User Temp%\nsbC.tmp\System.dll
  • %User Temp%\nsbC.tmp\blowfish.dll
  • %User Temp%\nsbC.tmp\nswg.dll
  • %User Temp%\nsbC.tmp\Final.html
  • %User Temp%\nsbC.tmp\Components.html
  • %User Temp%\nsbC.tmp\Background.png
  • %User Temp%\nsbC.tmp\welcomepage.html
  • %User Temp%\nsbC.tmp\welcomepage_noadw.html
  • %User Temp%\nsbC.tmp\welcomebg.gif
  • %User Temp%\nsbC.tmp\button.gif
  • %User Temp%\nsbC.tmp\button-active.gif
  • %User Temp%\nsbC.tmp\Components_noadw.html
  • %User Temp%\nsbC.tmp\bg-grey-wrapper.gif
  • %User Temp%\nsbC.tmp\bg-button.gif
  • %User Temp%\nsbC.tmp\bg.gif
  • %User Temp%\nsbC.tmp\bg-container.gif
  • %User Temp%\nsbC.tmp\button-inactive.gif
  • %User Temp%\nsbC.tmp\Progress.dll
  • %User Temp%\nsbC.tmp\Install.html
  • %User Temp%\nsbC.tmp\InetLoadEx.dll
  • %User Temp%\nsbC.tmp\downloads\74937.ex_
  • %User Temp%\nsbC.tmp\downloads\81812.ex_

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%\DOCUME~1
  • %System Root%\DOCUME~1\ADMINI~1
  • %User Profile%\LOCALS~1
  • %User Temp%\nsz3.tmp
  • %User Temp%\is-R5A6J.tmp
  • %User Temp%\is-J144P.tmp
  • %User Temp%\is-J144P.tmp\_isetup
  • %Program Files%\Hot CPU Tester Pro 4
  • %Start Menu%\Programs\Hot CPU Tester Pro 4
  • %User Temp%\nsk6.tmp
  • %User Temp%\nsb9.tmp
  • %User Temp%\nsbC.tmp
  • %User Temp%\nsbC.tmp\downloads

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_VB.LSY. 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%\nsk1.tmp
  • %User Temp%\nsz3.tmp
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Hot CPU Tester Pro 4.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Hot CPU Tester Pro 4.url
  • %Desktop%\Hot CPU Tester Pro.pif
  • %Desktop%\Hot CPU Tester Pro.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Help.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Help.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Uninstall Hot CPU Tester Pro 4.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\Uninstall Hot CPU Tester Pro 4.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\License Agreement.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\License Agreement.url
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\changes.pif
  • %Start Menu%\Programs\Hot CPU Tester Pro 4\changes.url
  • %User Temp%\nsk4.tmp
  • %User Temp%\nsk6.tmp
  • %User Temp%\nsb7.tmp
  • %User Temp%\nsb9.tmp
  • %User Temp%\nsmA.tmp
  • %User Temp%\nsbC.tmp

Step 8

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • {BEE9DFE1-7CDF-4D1C-A473-3B3DF8FF1431}_is1


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