ALIASES:

Generic.dx!bhgz (McAfee); Trojan Horse (Symantec); Trojan.Win32.Scar.gvhh (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)

 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: 998,965 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 07 Dec 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 drops the following copies of itself into the affected system:

  • %Program Files%\WinA\WinA.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

It creates the following folders:

  • %Program Files%\WinA
  • %User Temp%\jvoll22.exeDir
  • %User Temp%\is-C87AS.tmp
  • %Program Files%\JVolleyball
  • %Start Menu%\Programs\JVolleyball

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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, or C:\Users\{user name}\AppData\Local\Temp 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.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Live Update = "%Program Files%\WinA\WinA.exe OnStartup.xml"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Live Update = "%Program Files%\WinA\WinA.exe OnStartup_FallBack.xml"

Other System Modifications

This Trojan deletes the following files:

  • %User Startup%\Live update.lnk
  • %User Startup%\Antivirus live update.lnk
  • %Start Menu%\Programs\JVolleyball\JVolleyball.pif
  • %Start Menu%\Programs\JVolleyball\Uninstall JVolleyball.pif
  • %Desktop%\JVolleyball.pif

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.. %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.. %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.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
WinA

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1

HKEY_CURRENT_USER\Software\JVolleyball

HKEY_CURRENT_USER\Software\JVolleyball\
JVolleyball

HKEY_CURRENT_USER\Software\JVolleyball\
JVolleyball\params

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinA
DisplayName = "WinA"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
WinA
UninstallString = "%Program Files%\WinA\WinA.exe UninstallPartI.xml"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
Inno Setup: Setup Version = "3.0.7"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
Inno Setup: App Path = "%Program Files%\JVolleyball"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
Inno Setup: Icon Group = "JVolleyball"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
Inno Setup: User = "Wilbert"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
Inno Setup: Selected Tasks = "desktopicon"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
DisplayName = "JVolleyball 2.2"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
UninstallString = "%Program Files%\JVolleyball\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
JVolleyball_is1
Publisher = "D.F."

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
DirectDraw\MostRecentApplication
Name = "JVolleyball.exe"

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
DirectDraw\MostRecentApplication
ID = "422619e3"

(Note: The default value data of the said registry entry is 41107b81.)

Dropping Routine

This Trojan drops the following files:

  • %System Root%\_jvoll22.exe
  • %System Root%\UninstallPartII.xml
  • %System Root%\UninstallPartI.xml
  • %System Root%\OnStartup_FallBack.xml
  • %System Root%\OnStartup.xml
  • %System Root%\Instructions.xml
  • %System Root%\MultipurposeAgent_MyFileNameReport.xml
  • %User Temp%\INS1.tmp
  • %User Temp%\is-C87AS.tmp\_shfoldr.dll
  • %Program Files%\JVolleyball\unins000.dat
  • %Program Files%\JVolleyball\is-88V12.tmp
  • %Program Files%\JVolleyball\is-IER3A.tmp
  • %Program Files%\JVolleyball\is-8IBEP.tmp
  • %Program Files%\JVolleyball\is-FAP9B.tmp
  • %Program Files%\JVolleyball\is-RGIKD.tmp
  • %Program Files%\JVolleyball\is-ALUAT.tmp
  • %Program Files%\JVolleyball\is-I21NO.tmp
  • %Program Files%\JVolleyball\is-9P758.tmp
  • %Program Files%\JVolleyball\is-K7GAV.tmp
  • %Program Files%\JVolleyball\is-VTCIR.tmp
  • %Program Files%\JVolleyball\is-T69IC.tmp
  • %Program Files%\JVolleyball\is-9SH9C.tmp
  • %Program Files%\JVolleyball\is-GTHQJ.tmp
  • %Program Files%\JVolleyball\is-M1U7R.tmp
  • %Program Files%\JVolleyball\is-EJKUD.tmp
  • %Program Files%\JVolleyball\is-KJ9KE.tmp
  • %Program Files%\JVolleyball\is-728SU.tmp
  • %Start Menu%\Programs\JVolleyball\JVolleyball.lnk
  • %Start Menu%\Programs\JVolleyball\Uninstall JVolleyball.lnk
  • %Desktop%\JVolleyball.lnk
  • %Program Files%\WinA\Instructions.xml
  • %Program Files%\WinA\OnStartup.xml
  • %Program Files%\WinA\OnStartup_FallBack.xml
  • %Program Files%\WinA\UninstallPartI.xml
  • %Program Files%\WinA\UninstallPartII.xml
  • %User Temp%\jvoll22.exeDir\jvoll22.exe

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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.. %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.)

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

Restart in Safe Mode

[ Learn More ]

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_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • WinA
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • JVolleyball_is1
  • In HKEY_CURRENT_USER\Software
    • JVolleyball
  • In HKEY_CURRENT_USER\Software
    • JVolleyball
  • In HKEY_CURRENT_USER\Software\JVolleyball\JVolleyball
    • params

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Live Update = "%Program Files%\WinA\WinA.exe OnStartup.xml"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Live Update = "%Program Files%\WinA\WinA.exe OnStartup_FallBack.xml"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinA
    • DisplayName = "WinA"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinA
    • UninstallString = "%Program Files%\WinA\WinA.exe UninstallPartI.xml"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • Inno Setup: Setup Version = "3.0.7"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • Inno Setup: App Path = "%Program Files%\JVolleyball"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • Inno Setup: Icon Group = "JVolleyball"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • Inno Setup: User = "Wilbert"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • Inno Setup: Selected Tasks = "desktopicon"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • DisplayName = "JVolleyball 2.2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • UninstallString = "%Program Files%\JVolleyball\unins000.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\JVolleyball_is1
    • Publisher = "D.F."

Step 5

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_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication
    • From: Name = "JVolleyball.exe"
      To: Name = ""iexplore.exe""
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication
    • From: ID = "422619e3"
      To: ID = ""41107b81""

Step 6

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 Root%\_jvoll22.exe
  • %System Root%\UninstallPartII.xml
  • %System Root%\UninstallPartI.xml
  • %System Root%\OnStartup_FallBack.xml
  • %System Root%\OnStartup.xml
  • %System Root%\Instructions.xml
  • %System Root%\MultipurposeAgent_MyFileNameReport.xml
  • %User Temp%\INS1.tmp
  • %User Temp%\is-C87AS.tmp\_shfoldr.dll
  • %Program Files%\JVolleyball\unins000.dat
  • %Program Files%\JVolleyball\is-88V12.tmp
  • %Program Files%\JVolleyball\is-IER3A.tmp
  • %Program Files%\JVolleyball\is-8IBEP.tmp
  • %Program Files%\JVolleyball\is-FAP9B.tmp
  • %Program Files%\JVolleyball\is-RGIKD.tmp
  • %Program Files%\JVolleyball\is-ALUAT.tmp
  • %Program Files%\JVolleyball\is-I21NO.tmp
  • %Program Files%\JVolleyball\is-9P758.tmp
  • %Program Files%\JVolleyball\is-K7GAV.tmp
  • %Program Files%\JVolleyball\is-VTCIR.tmp
  • %Program Files%\JVolleyball\is-T69IC.tmp
  • %Program Files%\JVolleyball\is-9SH9C.tmp
  • %Program Files%\JVolleyball\is-GTHQJ.tmp
  • %Program Files%\JVolleyball\is-M1U7R.tmp
  • %Program Files%\JVolleyball\is-EJKUD.tmp
  • %Program Files%\JVolleyball\is-KJ9KE.tmp
  • %Program Files%\JVolleyball\is-728SU.tmp
  • %Start Menu%\Programs\JVolleyball\JVolleyball.lnk
  • %Start Menu%\Programs\JVolleyball\Uninstall JVolleyball.lnk
  • %Desktop%\JVolleyball.lnk
  • %Program Files%\WinA\Instructions.xml
  • %Program Files%\WinA\OnStartup.xml
  • %Program Files%\WinA\OnStartup_FallBack.xml
  • %Program Files%\WinA\UninstallPartI.xml
  • %Program Files%\WinA\UninstallPartII.xml
  • %User Temp%\jvoll22.exeDir\jvoll22.exe

Step 7

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.
  • %Program Files%\WinA
  • %User Temp%\jvoll22.exeDir
  • %User Temp%\is-C87AS.tmp
  • %Program Files%\JVolleyball
  • %Start Menu%\Programs\JVolleyball

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SCAR.ALR. 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 9

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 Startup%\Live update.lnk
  • %User Startup%\Antivirus live update.lnk
  • %Start Menu%\Programs\JVolleyball\JVolleyball.pif
  • %Start Menu%\Programs\JVolleyball\Uninstall JVolleyball.pif
  • %Desktop%\JVolleyball.pif


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