TROJ_SCAR.BC


 PLATFORM:

Windows

 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:

2,801,690 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

12 Oct 2015

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 Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

It creates the following folders:

  • %Program Files%\WinA
  • %User Temp%\Bombermania.exeDir
  • %User Temp%\is-BCLG3.tmp
  • %User Temp%\is-A377U.tmp
  • %Program Files%\Bombermania
  • %Start Menu%\Programs\Bombermania

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

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\Bombermania\Bombermania.pif
  • %Start Menu%\Programs\Bombermania\Uninstall Bombermania.pif
  • %Start Menu%\Programs\Bombermania\Just Free Games.com NOW!.pif
  • %Start Menu%\Programs\Bombermania\Sunny Games.pif
  • %Desktop%\Bombermania.pif
  • %Desktop%\Just Free Games.pif
  • %Desktop%\Sunny Games.pif

It adds the following registry keys:

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1

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\
Bombermania_Free_is1
Inno Setup: Setup Version = "4.2.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
Inno Setup: App Path = "%Program Files%\Bombermania"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
Inno Setup: Icon Group = "Bombermania"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
Inno Setup: User = "Wilbert"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
DisplayName = "Bombermania ver 1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
DisplayIcon = "%Program Files%\Bombermania\Bombermania.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
UninstallString = "%Program Files%\Bombermania\unins000.exe "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
DisplayVersion = "1.0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
Publisher = "Just Free Games"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
URLInfoAbout = "http://www.{BLOCKED}eegames.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
HelpLink = "http://www.{BLOCKED}eegames.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Bombermania_Free_is1
URLUpdateInfo = "http://www.{BLOCKED}eegames.com"

Dropping Routine

This Trojan drops the following files:

  • %System Root%\_Bombermania.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%\is-BCLG3.tmp\is-L0VLN.tmp
  • %User Temp%\is-A377U.tmp\_shfoldr.dll
  • %Program Files%\Bombermania\unins000.dat
  • %Program Files%\Bombermania\is-SH8UL.tmp
  • %Program Files%\Bombermania\is-DJ8KG.tmp
  • %Program Files%\Bombermania\is-AK2MS.tmp
  • %Program Files%\Bombermania\is-77ND0.tmp
  • %Program Files%\Bombermania\is-GA2EU.tmp
  • %Program Files%\Bombermania\is-AHJOQ.tmp
  • %Program Files%\Bombermania\is-CAKBI.tmp
  • %Program Files%\Bombermania\is-DHHFI.tmp
  • %Program Files%\Bombermania\is-HJE2P.tmp
  • %Program Files%\Bombermania\is-Q0RV2.tmp
  • %Program Files%\Bombermania\is-7S3PO.tmp
  • %Program Files%\Bombermania\is-3HV1D.tmp
  • %Program Files%\Bombermania\is-ODJIU.tmp
  • %Start Menu%\Programs\Bombermania\Bombermania.lnk
  • %Start Menu%\Programs\Bombermania\Uninstall Bombermania.lnk
  • %Start Menu%\Programs\Bombermania\Just Free Games.com NOW!.lnk
  • %Start Menu%\Programs\Bombermania\Sunny Games.lnk
  • %Desktop%\Bombermania.lnk
  • %Desktop%\Just Free Games.lnk
  • %Desktop%\Sunny Games.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%\Bombermania.exeDir\Bombermania.exe

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.750

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
    • Bombermania_Free_is1

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\Bombermania_Free_is1
    • Inno Setup: Setup Version = "4.2.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • Inno Setup: App Path = "%Program Files%\Bombermania"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • Inno Setup: Icon Group = "Bombermania"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • Inno Setup: User = "Wilbert"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • DisplayName = "Bombermania ver 1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • DisplayIcon = "%Program Files%\Bombermania\Bombermania.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • UninstallString = "%Program Files%\Bombermania\unins000.exe "
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • DisplayVersion = "1.0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • Publisher = "Just Free Games"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • URLInfoAbout = "http://www.{BLOCKED}eegames.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • HelpLink = "http://www.{BLOCKED}eegames.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Bombermania_Free_is1
    • URLUpdateInfo = "http://www.{BLOCKED}eegames.com"

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 Root%\_Bombermania.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%\is-BCLG3.tmp\is-L0VLN.tmp
  • %User Temp%\is-A377U.tmp\_shfoldr.dll
  • %Program Files%\Bombermania\unins000.dat
  • %Program Files%\Bombermania\is-SH8UL.tmp
  • %Program Files%\Bombermania\is-DJ8KG.tmp
  • %Program Files%\Bombermania\is-AK2MS.tmp
  • %Program Files%\Bombermania\is-77ND0.tmp
  • %Program Files%\Bombermania\is-GA2EU.tmp
  • %Program Files%\Bombermania\is-AHJOQ.tmp
  • %Program Files%\Bombermania\is-CAKBI.tmp
  • %Program Files%\Bombermania\is-DHHFI.tmp
  • %Program Files%\Bombermania\is-HJE2P.tmp
  • %Program Files%\Bombermania\is-Q0RV2.tmp
  • %Program Files%\Bombermania\is-7S3PO.tmp
  • %Program Files%\Bombermania\is-3HV1D.tmp
  • %Program Files%\Bombermania\is-ODJIU.tmp
  • %Start Menu%\Programs\Bombermania\Bombermania.lnk
  • %Start Menu%\Programs\Bombermania\Uninstall Bombermania.lnk
  • %Start Menu%\Programs\Bombermania\Just Free Games.com NOW!.lnk
  • %Start Menu%\Programs\Bombermania\Sunny Games.lnk
  • %Desktop%\Bombermania.lnk
  • %Desktop%\Just Free Games.lnk
  • %Desktop%\Sunny Games.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%\Bombermania.exeDir\Bombermania.exe

Step 6

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%\Bombermania.exeDir
  • %User Temp%\is-BCLG3.tmp
  • %User Temp%\is-A377U.tmp
  • %Program Files%\Bombermania
  • %Start Menu%\Programs\Bombermania

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SCAR.BC. 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 8

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\Bombermania\Bombermania.pif
  • %Start Menu%\Programs\Bombermania\Uninstall Bombermania.pif
  • %Start Menu%\Programs\Bombermania\Just Free Games.com NOW!.pif
  • %Start Menu%\Programs\Bombermania\Sunny Games.pif
  • %Desktop%\Bombermania.pif
  • %Desktop%\Just Free Games.pif
  • %Desktop%\Sunny Games.pif


Did this description help? Tell us how we did.