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Infected with Win32/Mebroot.mbr trojan, Do not know how to remove it

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2 replies to this topic

#1 persian_8ad_boy


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Posted 10 October 2010 - 11:22 AM

When I run ESET Smart Security Scan I receive a threat found alert. The message says:

MBR sector of the 1. physical disk

Win32/Mebroot.mbr trojan
When I select the clean button another message pops up saying "Error while cleaning - operation unavailable for this object type.

i have done what you needed in this post http://www.bleepingcomputer.com/forums/topic301026.html

ComboFix 10-10-09.06 - Majid 10/10/2010 16:49:32.1.2 - x86
Microsoft Windows 7 Ultimate 6.1.7600.0.1252.44.1033.18.2550.1704 [GMT 1:00]
Running from: c:\users\Majid\Desktop\thcbytes.exe

((((((((((((((((((((((((((((((((((((((( Other Deletions )))))))))))))))))))))))))))))))))))))))))))))))))


((((((((((((((((((((((((( Files Created from 2010-09-10 to 2010-10-10 )))))))))))))))))))))))))))))))

2010-10-10 23:57 . 2010-10-10 15:05 -------- d-----w- c:\windows\Panther
2010-10-10 15:53 . 2010-10-10 15:53 -------- d-----w- c:\users\Default\AppData\Local\temp
2010-10-10 15:31 . 2010-10-10 15:31 -------- d-----w- c:\windows\system32\Macromed
2010-10-10 15:22 . 2010-09-16 09:24 6084944 ----a-w- c:\programdata\Microsoft\Windows Defender\Definition Updates\{6C61CB89-412E-4559-BC10-160628837A7F}\mpengine.dll
2010-10-10 15:22 . 2010-05-21 13:14 221568 ------w- c:\windows\system32\MpSigStub.exe
2010-10-10 15:09 . 2010-10-10 15:37 -------- d-----w- c:\windows\system32\wbem\Performance
2010-10-10 15:09 . 2010-10-10 15:09 -------- d-----w- c:\program files\UlisesSoft
2010-10-10 15:08 . 2010-10-10 15:08 -------- d-----w- c:\program files\ESET
2010-10-10 15:08 . 2010-10-10 15:08 -------- d-----w- c:\windows\system32\x64
2010-10-10 15:08 . 2009-09-23 18:30 1002008 ----a-w- c:\windows\system32\igxpun.exe
2010-10-10 15:07 . 2010-10-10 15:08 -------- d-sh--w- c:\windows\Installer
2010-10-10 15:07 . 2009-12-29 06:55 172032 ----a-w- c:\windows\system32\wintrust.dll
2010-10-10 15:07 . 2010-01-09 06:52 132608 ----a-w- c:\windows\system32\cabview.dll
2010-10-10 15:05 . 2010-10-10 15:06 -------- d-----w- c:\users\Majid
2010-10-10 15:05 . 2010-10-10 15:05 -------- d-----w- C:\Recovery

(((((((((((((((((((((((((((((((((((((((( Find3M Report ))))))))))))))))))))))))))))))))))))))))))))))))))))

((((((((((((((((((((((((((((((((((((( Reg Loading Points ))))))))))))))))))))))))))))))))))))))))))))))))))
*Note* empty entries & legit default entries are not shown

"IgfxTray"="c:\windows\system32\igfxtray.exe" [2009-09-23 141848]
"HotKeysCmds"="c:\windows\system32\hkcmd.exe" [2009-09-23 173592]
"Persistence"="c:\windows\system32\igfxpers.exe" [2009-09-23 150552]
"egui"="c:\program files\ESET\ESET NOD32 Antivirus\egui.exe" [2009-11-16 2054360]

"ConsentPromptBehaviorAdmin"= 5 (0x5)
"ConsentPromptBehaviorUser"= 3 (0x3)
"EnableUIADesktopToggle"= 0 (0x0)

S1 ehdrv;ehdrv;c:\windows\system32\DRIVERS\ehdrv.sys [2009-11-16 108792]
S2 ekrn;ESET Service;c:\program files\ESET\ESET NOD32 Antivirus\ekrn.exe [2009-11-16 735960]
S2 epfwwfpr;epfwwfpr;c:\windows\system32\DRIVERS\epfwwfpr.sys [2009-12-18 95896]

--------------------- LOCKED REGISTRY KEYS ---------------------

@Denied: (A 2) (Everyone)




@Denied: (A 2) (Everyone)



@Denied: (A) (Users)
@Denied: (A) (Everyone)
@Allowed: (B 1 2 3 4 5) (S-1-5-20)

@Denied: (Full) (Everyone)
------------------------ Other Running Processes ------------------------
c:\program files\Windows Media Player\wmpnetwk.exe
Completion time: 2010-10-10 16:57:29 - machine was rebooted
ComboFix-quarantined-files.txt 2010-10-10 15:57

Pre-Run: 9,925,251,072 bytes free
Post-Run: 9,667,289,088 bytes free

- - End Of File - - E6A1A2E8D96937B8DAC6D1A263E8913E

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 ACPI.sys halmacpi.dll ataport.SYS intelide.sys PCIIDEX.SYS atapi.sys dxgkrnl.sys igdkmd32.sys dxgmms1.sys
kernel: MBR read successfully
user & kernel MBR OK

when i ran the help.bat it created a log on my desktop but there is nothing in there.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\S-1-5-18
ProfileImagePath REG_EXPAND_SZ %systemroot%\system32\config\systemprofile

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\S-1-5-19
ProfileImagePath REG_EXPAND_SZ C:\Windows\ServiceProfiles\LocalService

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\S-1-5-20
ProfileImagePath REG_EXPAND_SZ C:\Windows\ServiceProfiles\NetworkService

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\S-1-5-21-1998434075-1819095533-883866243-1001
ProfileImagePath REG_EXPAND_SZ C:\Users\Majid

SystemRoot REG_SZ C:\Windows

This log file is located at C:\rkill.log.
Please post this only if requested to by the person helping you.
Otherwise you can close this log when you wish.
Ran as Majid on 10/10/2010 at 16:45:24.

Services Stopped:

Processes terminated by Rkill or while it was running:


Rkill completed on 10/10/2010 at 16:45:30.

thank you for your time

BC AdBot (Login to Remove)


#2 Elise


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Posted 17 October 2010 - 07:31 AM

Hello ,
And welcome.gif to the Bleeping Computer Malware Removal Forum
. My name is Elise and I'll be glad to help you with your computer problems.

I will be working on your malware issues, this may or may not solve other issues you may have with your machine.

Please note that whatever repairs we make, are for fixing your computer problems only and by no means should be used on another computer.
  • The cleaning process is not instant. Logs can take some time to research, so please be patient with me. I know that you need your computer working as quickly as possible, and I will work hard to help see that happen.
  • Please reply using the Add/Reply button in the lower right hand corner of your screen. Do not start a new topic.
  • The logs that you post should be pasted directly into the reply. Only attach them if requested or if they do not fit into the post.
  • Unfortunately, if I do not hear back from you within 5 days, I will be forced to close your topic. If you still need help after I have closed your topic, send me or a moderator a personal message with the address of the thread or feel free to create a new one.
You may want to keep the link to this topic in your favorites. Alternatively, you can click the button at the top bar of this topic and Track this Topic, where you can choose email notifications. The topics you are tracking are shown here.

If you have since resolved the original problem you were having, we would appreciate you letting us know. If not please perform the following steps below so we can have a look at the current condition of your machine.

If you have not done so, include a clear description of the problems you're having, along with any steps you may have performed so far.

If you have already posted a log, please do so again, as your situation may have changed.
Use the 'Add Reply' and add the new log to this thread.

We need to see some information about what is happening in your machine. Please perform the following scan:
  • Please download OTL from one of the following mirrors:
  • Save it to your desktop.
  • Double click on the icon on your desktop.
  • Click the "Scan All Users" checkbox.
  • Push the Quick Scan button.
  • Two reports will open, copy and paste them in a reply here:
    • OTListIt.txt <-- Will be opened
    • Extra.txt <-- Will be minimized

Please download Rootkit Unhooker and save it to your Desktop
  • Double-click on RKUnhookerLE to run it
  • Click the Report tab, then click Scan
  • Check Drivers, Stealth and uncheck the rest
  • Click OK
  • Wait until it's finished and then go to File > Save Report
  • Save the report to your Desktop
Copy the entire contents of the report and paste it in a reply here.

Note - you may get this warning it is ok, just ignore: "Rootkit Unhooker has detected a parasite inside itself!
It is recommended to remove parasite, okay?"

In the meantime please, do NOT install any new programs or update anything unless told to do so while we are fixing your problem

If you still need help, please include the following in your next reply
  • A detailed description of your problems
  • A new OTL log (don't forget extra.txt)
  • RKU log

Thanks and again sorry for the delay.

regards, Elise

"Now faith is the substance of things hoped for, the evidence of things not seen."


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#3 Elise


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Posted 31 October 2010 - 05:41 AM

Due to lack of feedback, this topic will now be closed.

If you are the original topic starter and you need it reopened, please send me a PM.

Everyone else, please start a new topic.

regards, Elise

"Now faith is the substance of things hoped for, the evidence of things not seen."


Follow BleepingComputer on: Facebook | Twitter | Google+ | lockerdome


Malware analyst @ Emsisoft

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