TROJ_BUZUS.BYR
VirTool:Win32/VBInject.gen!AV (Microsoft); Generic.dx!ip (McAfee); Trojan Horse (Symantec); ARC:NSIS, ARC:[Fraps 2.9.8 Build 7777 Setup.exe]:NSIS, PAK:[Fraps 2.9.8 Build 7777 Setup.exe/fraps.e (Kaspersky); LooksLike.Win32.Malware!vb (v) (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
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
1,459,476 bytes
EXE
No
20 Oct 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\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsk3.tmp
- %System Root%\Fraps
- %System Root%\Fraps\HELP
- %System Root%\Documents and Settings\Wilbert
- %Start Menu%\Programs\Fraps
- %User Profile%\Application Data\TEMP
(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.. %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%\nss1.tmp
- %User Temp%\nsz2.tmp
- %User Temp%\nsk3.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 adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\MediaResources\icm\
VIDC.FPS1
HKEY_LOCAL_MACHINE\SOFTWARE\Fraps2
HKEY_LOCAL_MACHINE\SOFTWARE\Fraps
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Fraps
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Layers
HKEY_LOCAL_MACHINE\Software\Licenses
HKEY_CLASSES_ROOT\CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}\Version
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\drivers.desc
frapsvid.dll = "Fraps Video Decompressor"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Drivers32
VIDC.FPS1 = "frapsvid.dll"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\MediaResources\icm\
VIDC.FPS1
Description = "Fraps Video Decompressor"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\MediaResources\icm\
VIDC.FPS1
Driver = "frapsvid.dll"
HKEY_LOCAL_MACHINE\SOFTWARE\Fraps2
Fix2G = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\Fraps
Install_Dir = "%System Root%\Fraps"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Fraps
DisplayName = "Fraps (remove only)"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Fraps
UninstallString = "%System Root%\Fraps\uninstall.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Fraps
NsisSM = "Fraps"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Fraps
NsisInst = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\AppCompatFlags\
Layers
%System Root%\Fraps\fraps.exe = "RUNASADMIN"
HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{R7C0DB872A3F777C0} = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{K7C0DB872A3F777C0} = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}\InprocServer32
ThreadingModel = "Both"
HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{I7F9ECD69182A4E6B} = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
{07F9ECD69182A4E6B} = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Fraps2
Fix2G = "0"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = "3a98"
(Note: The default value data of the said registry entry is 3a98.)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\Fraps 2.9.8 Build 7777 Setup.exe
- %User Temp%\wplayer.exe
- %User Temp%\beepa.bmp
- %User Temp%\nsk3.tmp\AdvSplash.dll
- %User Temp%\nsk3.tmp\StartMenu.dll
- %System Root%\Fraps\fraps.exe
- %System Root%\Fraps\fraps.dll
- %System Root%\Fraps\fraps64.dll
- %System Root%\Fraps\frapslcd.dll
- %System Root%\Fraps\fraps64.dat
- %System Root%\Fraps\changes.txt
- %System Root%\Fraps\README.HTM
- %System Root%\Fraps\HELP\fps.gif
- %System Root%\Fraps\HELP\general.gif
- %System Root%\Fraps\HELP\help_fps.htm
- %System Root%\Fraps\HELP\help_general.htm
- %System Root%\Fraps\HELP\help_movies.htm
- %System Root%\Fraps\HELP\help_screenshots.htm
- %System Root%\Fraps\HELP\movies.gif
- %System Root%\Fraps\HELP\screenshots.gif
- %System%\frapsvid.dll
- %User Temp%\nsk3.tmp\System.dll
- %Start Menu%\Programs\Fraps\Uninstall.lnk
- %Start Menu%\Programs\Fraps\Fraps.lnk
- %Desktop%\Fraps.lnk
- %System Root%\Fraps\uninstall.exe
- %User Temp%\u16event.dat
(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.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows 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.)
This report is generated via an automated analysis system.
SOLUTION
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
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\SYSTEM\CurrentControlSet\Control\MediaResources\icm
- VIDC.FPS1
- In HKEY_LOCAL_MACHINE\SOFTWARE
- Fraps2
- In HKEY_LOCAL_MACHINE\SOFTWARE
- Fraps
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
- Fraps
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags
- Layers
- In HKEY_LOCAL_MACHINE\Software
- Licenses
- In HKEY_CLASSES_ROOT\CLSID
- {39F3C665-CA2F-6464-5A0F-015FE8AB3688}
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}
- InprocServer32
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}
- ProgID
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}
- TypeLib
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}
- Version
Step 3
Delete this registry value
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 NT\CurrentVersion\drivers.desc
- frapsvid.dll = "Fraps Video Decompressor"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32
- VIDC.FPS1 = "frapsvid.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\icm\VIDC.FPS1
- Description = "Fraps Video Decompressor"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MediaResources\icm\VIDC.FPS1
- Driver = "frapsvid.dll"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Fraps2
- Fix2G = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Fraps
- Install_Dir = "%System Root%\Fraps"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Fraps
- DisplayName = "Fraps (remove only)"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Fraps
- UninstallString = "%System Root%\Fraps\uninstall.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Fraps
- NsisSM = "Fraps"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Fraps
- NsisInst = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
- %System Root%\Fraps\fraps.exe = "RUNASADMIN"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
- {R7C0DB872A3F777C0} = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
- {K7C0DB872A3F777C0} = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{39F3C665-CA2F-6464-5A0F-015FE8AB3688}\InprocServer32
- ThreadingModel = "Both"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
- {I7F9ECD69182A4E6B} = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Licenses
- {07F9ECD69182A4E6B} = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Fraps2
- Fix2G = "0"
Step 4
Restore this modified registry value
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\RFC1156Agent\CurrentVersion\Parameters
- From: TrapPollTimeMilliSecs = "3a98"
To: TrapPollTimeMilliSecs = ""3a98""
- From: TrapPollTimeMilliSecs = "3a98"
Step 5
Search and delete these files
- %User Temp%\Fraps 2.9.8 Build 7777 Setup.exe
- %User Temp%\wplayer.exe
- %User Temp%\beepa.bmp
- %User Temp%\nsk3.tmp\AdvSplash.dll
- %User Temp%\nsk3.tmp\StartMenu.dll
- %System Root%\Fraps\fraps.exe
- %System Root%\Fraps\fraps.dll
- %System Root%\Fraps\fraps64.dll
- %System Root%\Fraps\frapslcd.dll
- %System Root%\Fraps\fraps64.dat
- %System Root%\Fraps\changes.txt
- %System Root%\Fraps\README.HTM
- %System Root%\Fraps\HELP\fps.gif
- %System Root%\Fraps\HELP\general.gif
- %System Root%\Fraps\HELP\help_fps.htm
- %System Root%\Fraps\HELP\help_general.htm
- %System Root%\Fraps\HELP\help_movies.htm
- %System Root%\Fraps\HELP\help_screenshots.htm
- %System Root%\Fraps\HELP\movies.gif
- %System Root%\Fraps\HELP\screenshots.gif
- %System%\frapsvid.dll
- %User Temp%\nsk3.tmp\System.dll
- %Start Menu%\Programs\Fraps\Uninstall.lnk
- %Start Menu%\Programs\Fraps\Fraps.lnk
- %Desktop%\Fraps.lnk
- %System Root%\Fraps\uninstall.exe
- %User Temp%\u16event.dat
Step 6
Search and delete these folders
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %User Temp%\nsk3.tmp
- %System Root%\Fraps
- %System Root%\Fraps\HELP
- %System Root%\Documents and Settings\Wilbert
- %Start Menu%\Programs\Fraps
- %User Profile%\Application Data\TEMP
Step 7
Scan your computer with your Trend Micro product to delete files detected as TROJ_BUZUS.BYR. 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 Temp%\nss1.tmp
- %User Temp%\nsz2.tmp
- %User Temp%\nsk3.tmp
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