Check MBR for viruses

Intro

Method: Gmer

• Download HERE
• Turn off your antivirus and cut the connection.
• Double-click mbr.exe.
• A report will be generated: mbr.log
• In cases of infection, this message MBR rootkit code detected will appear in the report.
• In the Start Menu> Run, type:

"%userprofile%Bureaumbr" -f

• In mbr.log this line appears: the original MBR restored successfully!
• You can post the report to get some help on the Forum.

Stealth MBR rootkit/Mebroot/Sinowal detector 0.3.7 by Gmer, http://www.gmer.net      

device: opened successfully      
user: MBR read successfully      
kernel: MBR read successfully      
user & kernel MBR OK 

Method: Recovery Console and fixmbr

• You need to have in your possession the Windows CD.
• Start on the Windows CD.
• Start the Recovery Console as explained here.
• Once the Recovery Console, type the following command:

• And validate by [Enter] key on your keyboard.

Method: Combofix

• Right click here.
• Choose: Save target as
• Choose the Desktop as the destination.
• In the "File Name", rename ComboFix.exe to pctipsbyanu.exe example, then save.
• Warning! The renaming stage is mandatory under penalty ofdisplaying the message "ComboFix.exe is not a valid win32 application"and thus make it completely unnecessary and inefficient.
• Disconnect from the Internet and close all applications and programs running.
• Double-click pctipsbyanu.exe to start the fix (Vista and Seven: right-click and choose "Run as administrator").
• Accept the warning message and accept the installation of the Recovery Console (in XP).
• The report will be created under the root: C:Combofix.txt

Stealth MBR rootkit/Mebroot/Sinowal detector 0.3.7 by Gmer, http://www.gmer.net      

device: opened successfully      
user: MBR read successfully      
called modules: ntkrnlpa.exe CLASSPNP.SYS disk.sys PCTCore.sys ACPI.sys hal.dll atapi.sys spzt.sys >>UNKNOWN [0x86F80938]<<      
kernel: MBR read successfully      
detected MBR rootkit hooks:      
DriverDisk -> CLASSPNP.SYS @ 0xf7749f28      
DriverACPI -> ACPI.sys @ 0xf7422cb8      
Driveratapi -> atapi.sys @ 0xf739fb40      
IoDeviceObjectType -> DeleteProcedure -> ntkrnlpa.exe @ 0x805836a8      
ParseProcedure -> ntkrnlpa.exe @ 0x805827e8      
DeviceHarddisk0DR0 -> DeleteProcedure -> ntkrnlpa.exe @ 0x805836a8      
ParseProcedure -> ntkrnlpa.exe @ 0x805827e8      
NDIS: Broadcom NetLink (TM) Gigabit Ethernet -> SendCompleteHandler -> NDIS.sys @ 0xf72b5bb0      
PacketIndicateHandler -> NDIS.sys @ 0xf72a4a0d      
SendHandler -> NDIS.sys @ 0xf72b8b40      
user & kernel MBR OK

• Or

Stealth MBR rootkit/Mebroot/Sinowal detector 0.3.7 by Gmer, http://www.gmer.net      
device: opened successfully      
user: MBR read successfully      
kernel: MBR read successfully      
MBR rootkit code detected !      
malicious code @ sector 0x12a14c0 size 0x1ad !      
copy of MBR has been found in sector 62 !      
MBR rootkit infection detected ! Use: "mbr.exe -f" to fix.

(((((((((((((((((((((((((((((((((( PC Tips by Anu
Other deletions )))))))))))))))))))))))))))))))))))))))))))))))))
\ \. \ PhysicalDrive0 - bootkit Sinowal WAS found and disinfected
\ \. \ PhysicalDrive0 - bootkit Sinowal WAS found and disinfected
.
(((((((((((((((((((( PC Tips by Anu 2010-11-18 to 2010-12-18
Files created between 2010-11-18 and 2010-12-18 ))))))))))))))))))))))))))))))

Method: Bootkit Remover

• Download and unzip Bootkit Remover to the desktop.
• Download BTKR_Runbox on the desktop.
  • Note that: You must have the remover.exe and BTKR_Runbox.exe on the desktop for tool works correctly.
• Start BTKR_Runbox then select option 3
• Confirm by pressing "1" then [Enter]
• The PC will restart. After reboot, restart BTKR_Runbox by selecting option 1
• If the procedure worked well, it should be written " OK [DOS/Win32 Boot code found] "

Method: MBRCheck

• Download MBRCheck on the desktop.
• Close all applications.
• Follow the instructions, you'll be prompted to restart the PC.
• If you get this:
  • Found non-standard or infected MBR.
• Enter 'Y' and hit ENTER for more options, or 'N' to exit:
• Press the Y key and validate using the [Enter] key
• You should get this:

Options:     

[1] Dump the MBR of a physical disk to file.     

[2] Restore the MBR of a physical disk with a standard boot code.     

[3] Exit.     

• You will get this:
  • Enter your choice: Enter the physical disk number to fix (0-99, -1 to cancel):
  • The disk number to use is 0
• From now on you will have to chose between several MBR codes:
  • Available MBR codes:

[ 0] Default (Windows XP)     

[ 1] Windows XP     

[ 2] Windows Server 2003     

[ 3] Windows Vista     

[ 4] Windows 2008     

[ 5] Windows 7     

[-1] Cancel 

• Type the number corresponding to your operating system and confirm with [Enter]
• Then you will have this:
• Do you want to fix the MBR code? Type 'YES' and hit ENTER to continue:
• You should have this message:
• Do you want to fix the MBR code? Type 'YES' and hit ENTER to continue: Successfully wrote new MBR code!

• Restart your PC and post the report generated on the appropriate forum.
• Following this, restart MBRCheck that would normally tell you "Windows XX (XX is your version of Windows) MBR code detected".

Method: ZhpFix

---\\ Search infection Master Boot Record (O80)    
Stealth MBR rootkit/Mebroot/Sinowal detector 0.3.7 by Gmer, http://www.gmer.net    
Run by Sabrina at 28/06/2010 18:29:00    
device: opened successfully    
user: MBR read successfully    
called modules: ntkrnlpa.exe CLASSPNP.SYS disk.sys ACPI.sys hal.dll >>UNKNOWN [0x8410A328]<<    
kernel: MBR read successfully    
detected MBR rootkit hooks:    
\Driver\atapi -> 0x8410a328    
Warning: possible MBR rootkit infection !    
copy of MBR has been found in sector 0x05D267C0    
malicious code @ sector 0x05D267C3 !    
PE file found in sector at 0x05D267D9 !    
MBR rootkit infection detected ! Use: "mbr.exe -f" to fix.    
Use "ZHPFix" command "MBRFix" to clear infection !

• Start ZHPFix from the desktop shortcut ( under Vista and 7: runas administrator mode) or from ZHPDiag that contains the shortcut toZhpFix (an icon located at the top)
• Click MBRfix located on the right side of the screen ,
• Click 'No' to the message that appears on the screen,
• Leave the tool work
• At the end of treatment, a report is displayed
• You can post the report on the appropriate forum.
• Restart the PC for the modifications to be taken in consideration and check with ZHPDiag that the infection is no more.

Method: Antiboot from Kaspersky

Other methods

• MacAfee antirootkit
• Sophos Anti-Rootkit Sophos Anti rootkit
• Rootkit F Secure Black Light
• http://www.f-secure.com/ Eliminator
• Avira AntiRootkit
• AVG Anti-Rootkit
• G Data Remover
• Panda Anti-Rootkit
• Vba32 AntiRootkit

Online Scan

• Online scan BitDefender
• Online scan TrendMicro
• Online scan Computer Associates
• Online scan F-Secure
• Online scan Kapersky