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Trojan Found: Perfc000.dat

63 min read

This thread's last reply is from . Advice, software, and links below may be out of date — treat specific steps and download links with caution.

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Post #91 last edited
Hey people :wavey:

I think i have solved the problem!
There aren't apearing any Antivir alerts anymore, and the file perfc000.dat is gone, i have deleted it :P

I have tricked out the trojan:

1. I ran Windows in the safe mode
2. I created a new txt file and named it perfc000.dat
3. I opened the folder: C:\WINDOWS\system32\perfc000.dat
4. Then i replaced the trojan perfc000.dat with the created fake perfc000.dat
5. Suddenly a new file appeard called: perfc000.dat.Vir in C:\WINDOWS\system32\
6. So, i right clicked this new file and start the AntiVir scan: It found the usual TR/Crypt.XPACK.Gen Trojan
7. Then i choosed the option: put in quarantine, and this time it works, the file perfc000.dat.Vir now doesn't appear anymore.
8. After this i rebooted the computer and started windows, there were severals error messages appearing at the start that said something like:

Couldn't lunch C:\WINDOWS\system32\perfc000.dat

9. this message appeared everytime when i started a new program or action…
10. So i just deleted the fake perfc000.dat in C:\WINDOWS\system32\
11. Now everything works fine :thumbup:

I hope it is fixed now :P


Thx everyone for your gently help and time, espacially LDTate :wub:

If theres still something wrong i will report!
Post #93
Here is the Log, HijackThis shows that perfc000.dat is still there, but when i open C:\WINDOWS\system32\ I can't find it there?
And there aren't any AntiVir alerts anymore… I don't understand why HijackThis is showing it…

Logfile of HijackThis v1.99.1
Scan saved at 23:44, on 07-05-05
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\Mixer.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Dokumente und Einstellungen\Administrator\Desktop\uosu160\UOSU.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programme\Internet Explorer\IEXPLORE.EXE
C:\WINDOWS\system32\osk.exe
C:\WINDOWS\system32\MSSWCHX.EXE
C:\Dokumente und Einstellungen\Administrator\Desktop\hijackthis\HijackThis.exe

O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programme\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O4 - HKLM\..\Run: [PRISMSVR.EXE] "C:\Programme\Siemens\Gigaset USB Adapter 54\PRISMSVR.EXE" /APPLY
O4 - HKLM\..\Run: [avgnt] "C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Programme\Unlocker\UnlockerAssistant.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programme\Gemeinsame Dateien\Ahead\lib\NMBgMonitor.exe"
O4 - Global Startup: Gigaset WLAN Adapter Monitor.lnk = C:\Programme\Siemens\Gigaset USB Adapter 54\GigasetUSBMonitor.exe
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Programme\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: hpoddt01.exe.lnk = ?
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Knowledge Base Suche - {8b2d996f-b7d1-4961-a929-414d9cf5ba7b} - http://support.microsoft.com/default.aspx?…H;EN-US;KBHOWTO (file missing)
O9 - Extra 'Tools' menuitem: Knowledge Base Suche - {8b2d996f-b7d1-4961-a929-414d9cf5ba7b} - http://support.microsoft.com/default.aspx?…H;EN-US;KBHOWTO (file missing)
O9 - Extra button: Recherchieren - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O9 - Extra 'Tools' menuitem: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/german/partne…can_unicode.cab
O16 - DPF: {9D190AE6-C81E-4039-8061-978EBAD10073} (F-Secure Online Scanner 3.0) - http://support.f-secure.com/ols/fscax.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O20 - AppInit_DLLs: C:\WINDOWS\system32\perfc000.dat
O23 - Service: Adobe LM Service - Adobe Systems - C:\Programme\Gemeinsame Dateien\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: AntiVir PersonalEdition Classic Planer (AntiVirScheduler) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
Post #94
Here is a new Log after Fix Checked O20 - AppInit_DLLs: C:\WINDOWS\system32\perfc000.dat








Logfile of HijackThis v1.99.1
Scan saved at 23:48, on 07-05-05
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\Mixer.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\wuauclt.exe
C:\Dokumente und Einstellungen\Administrator\Desktop\uosu160\UOSU.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Programme\Internet Explorer\IEXPLORE.EXE
C:\WINDOWS\system32\osk.exe
C:\WINDOWS\system32\MSSWCHX.EXE
C:\Dokumente und Einstellungen\Administrator\Desktop\hijackthis\HijackThis.exe
C:\WINDOWS\system32\NOTEPAD.EXE

O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programme\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O4 - HKLM\..\Run: [PRISMSVR.EXE] "C:\Programme\Siemens\Gigaset USB Adapter 54\PRISMSVR.EXE" /APPLY
O4 - HKLM\..\Run: [avgnt] "C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Programme\Unlocker\UnlockerAssistant.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programme\Gemeinsame Dateien\Ahead\lib\NMBgMonitor.exe"
O4 - Global Startup: Gigaset WLAN Adapter Monitor.lnk = C:\Programme\Siemens\Gigaset USB Adapter 54\GigasetUSBMonitor.exe
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Programme\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: hpoddt01.exe.lnk = ?
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Knowledge Base Suche - {8b2d996f-b7d1-4961-a929-414d9cf5ba7b} - http://support.microsoft.com/default.aspx?…H;EN-US;KBHOWTO (file missing)
O9 - Extra 'Tools' menuitem: Knowledge Base Suche - {8b2d996f-b7d1-4961-a929-414d9cf5ba7b} - http://support.microsoft.com/default.aspx?…H;EN-US;KBHOWTO (file missing)
O9 - Extra button: Recherchieren - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O9 - Extra 'Tools' menuitem: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/german/partne…can_unicode.cab
O16 - DPF: {9D190AE6-C81E-4039-8061-978EBAD10073} (F-Secure Online Scanner 3.0) - http://support.f-secure.com/ols/fscax.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O23 - Service: Adobe LM Service - Adobe Systems - C:\Programme\Gemeinsame Dateien\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: AntiVir PersonalEdition Classic Planer (AntiVirScheduler) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
Post #95
It might be gone.

Double-click My Computer.
Click the Tools menu, and then click Folder Options.
Click the View tab.
Clear "Hide file extensions for known file types."
Under the "Hidden files" folder, select "Show hidden files and folders."
Clear "Hide protected operating system files."
Click Apply, and then click OK.

Close all windows and browsers.
Open HijackThis

Click on Open Misc Tools
Click on Delete a File On Reboot
Click once on the file below to select it:
C:\WINDOWS\system32\perfc000.dat

Click on the Back button to exit Process Manager

Now, back at the main screen of HijackThis, proceed to Scan.
and put a check by these.

O20 - AppInit_DLLs: C:\WINDOWS\system32\perfc000.dat

Close ALL windows and browsers except HijackThis and click "Fix checked"


Reboot and "copy/paste" a new HijackThis log file into this thread.
Post #96 last edited
sorry for the stupid question… what do you mean with clear? Does it mean check or uncheck?
Post #98 last edited
The Folder option that you described were already set, I don't have to do anything anymore. And the file C:\WINDOWS\system32\perfc000.dat doesn't exist anymore, because i already have fix checked it But to be sure, I'll make a reboot and then we'll see if the trojan appears. :ph34r:
Post #100
This is the Log after the restart, there even didn't appeared the file perfc000.dat.
Looks like everything is ok now?



Logfile of HijackThis v1.99.1
Scan saved at 00:11, on 07-05-06
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP2 (6.00.2900.2180)

Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe
C:\WINDOWS\Mixer.exe
C:\WINDOWS\system32\ctfmon.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\Programme\Internet Explorer\IEXPLORE.EXE
C:\WINDOWS\system32\wuauclt.exe
C:\Dokumente und Einstellungen\Administrator\Desktop\hijackthis\HijackThis.exe
C:\WINDOWS\system32\spoolsv.exe

O2 - BHO: (no name) - {53707962-6F74-2D53-2644-206D7942484F} - C:\Programme\Spybot - Search & Destroy\SDHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O4 - HKLM\..\Run: [PRISMSVR.EXE] "C:\Programme\Siemens\Gigaset USB Adapter 54\PRISMSVR.EXE" /APPLY
O4 - HKLM\..\Run: [avgnt] "C:\Programme\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKLM\..\Run: [C-Media Mixer] Mixer.exe /startup
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Programme\Unlocker\UnlockerAssistant.exe"
O4 - HKCU\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [BgMonitor_{79662E04-7C6C-4d9f-84C7-88D8A56B10AA}] "C:\Programme\Gemeinsame Dateien\Ahead\lib\NMBgMonitor.exe"
O4 - Global Startup: Gigaset WLAN Adapter Monitor.lnk = C:\Programme\Siemens\Gigaset USB Adapter 54\GigasetUSBMonitor.exe
O4 - Global Startup: hp psc 2000 Series.lnk = C:\Programme\Hewlett-Packard\Digital Imaging\bin\hpobnz08.exe
O4 - Global Startup: hpoddt01.exe.lnk = ?
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Konsole - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Programme\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Knowledge Base Suche - {8b2d996f-b7d1-4961-a929-414d9cf5ba7b} - http://support.microsoft.com/default.aspx?…H;EN-US;KBHOWTO (file missing)
O9 - Extra 'Tools' menuitem: Knowledge Base Suche - {8b2d996f-b7d1-4961-a929-414d9cf5ba7b} - http://support.microsoft.com/default.aspx?…H;EN-US;KBHOWTO (file missing)
O9 - Extra button: Recherchieren - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O9 - Extra 'Tools' menuitem: ICQ Lite - {B863453A-26C3-4e1f-A54D-A2CD196348E9} - C:\Programme\ICQLite\ICQLite.exe
O16 - DPF: {0EB0E74A-2A76-4AB3-A7FB-9BD8C29F7F75} (CKAVWebScan Object) - http://www.kaspersky.com/kos/german/partne…can_unicode.cab
O16 - DPF: {9D190AE6-C81E-4039-8061-978EBAD10073} (F-Secure Online Scanner 3.0) - http://support.f-secure.com/ols/fscax.cab
O18 - Protocol: livecall - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O18 - Protocol: msnim - {828030A1-22C1-4009-854F-8E305202313F} - C:\PROGRA~1\MSNMES~1\MSGRAP~1.DLL
O23 - Service: Adobe LM Service - Adobe Systems - C:\Programme\Gemeinsame Dateien\Adobe Systems Shared\Service\Adobelmsvc.exe
O23 - Service: AntiVir PersonalEdition Classic Planer (AntiVirScheduler) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: AntiVir PersonalEdition Classic Guard (AntiVirService) - Avira GmbH - C:\Programme\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Ati HotKey Poller - Unknown owner - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
Post #102

Maby the same trick will work with 1Techwreck perfc000.dat problem?
http://forums.tomcoyote.org/Help_Hijackthi….html&st=15

His is a little different with some trojans.

Don't forget to rename that file back if you changed it for the silent runner scan

GREAT JOB :thumbup:

You can remove any programs I had you install. Use Add/Remove Programs to remove if listed there otherwise just delete them and empty recycle bin.

Log looks good :D


You need to create a new Clean restore point.

Note: This will remove all previous Restore Points

Turn off System Restore:

On the Desktop, right-click My Computer.
Click Properties.
Click the System Restore tab.
Check Turn off System Restore.
Click Apply, and then click OK.

Restart your computer, turn it back on.

On the Desktop, right-click My Computer.
Click Properties.
Click the System Restore tab.
Remove the Check Turn off System Restore.
Click Apply, and then click OK.

Double-click My Computer.
Click the Tools menu, and then click Folder Options.
Click the View tab.
Check "Hide file extensions for known file types."
Under the "Hidden files" folder, Uncheck "Show hidden files and folders."
Check "Hide protected operating system files."
Click Apply, and then click OK.



If you dont have any programs like these, I would recommend that you get them.
Spywareblaster,
Spywareguard.


Also get a FREE FIREWALL and FREE ANTI VIRUS if you need one.

Only run one Anti-Virus and Firewall program.

It is critical to have both a firewall and anti virus to protect your system.

Keep your system up to date and run Adaware & Spybot, once a week works, and hopefully you will be ok from here on. Both are available below.

Do not use Ad-aware if you have McAfee's VirusScan and AntiSpyware


Safe Surfing. :D

I would also suggest you read this:
So how did I get infected in the first place?
by Tony Klein
Post #103
Well it looks like my problem is fixed, THX very much for your help and guiding :P

We will see tomorrow if 1Techwreck will fix the problem also.

Well cya until tomorrow and good n8 :D
Post #104
It might have been as easy as: Use the delete file on reboot with HJT and then I fixed the O20 in HijackThis. But the rename worked :thumbup:
Post #105

It might have been as easy as:

Use the delete file on reboot with HJT and then I fixed the O20 in HijackThis.

Exactly - I "installed" this one a half an hour ago and it's indeed stubborn since it's loaded under the appinit_dlls, which means that it is injected in every program/process which uses user32.dll (which is almost every running process - except for some).
So that explains why it was getting recreated immediately again when you tried to delete it, since it's still loaded. And it watches its appinit_dlls value.
Since you replaced it with a "dummy file", this explains as well why you got these error messages after reboot, because it sees it as a bad image. But after you deleted that dummy file, those errors should be gone. :)
Anyway, easier was was just to delete it on reboot - using the "delete on reboot" - option in HijackThis - then there were no errors either after reboot :)

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