Hi there,

My XP Home machine has some sort of infection that changes the windows update image path registry key to "fystemroot" instead of "systemroot." If I change it, I receive an access denied message. MalwareBytes shows no infections.

If I change the permissions, they reset again before I can modify the registry key. I've tried booting into safe mode as the administrator and changing the key there, but at soon as I reboot into normal mode the changed keys are back and I can't modify the permissions.

Any suggestions would be appreciated, thanks!

Here is my HijackThis log, if that will help:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 10:37:37 AM, on 6/18/2009
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v8.00 (8.00.6001.18702)
Boot mode: Normal

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:\Program Files\Windows Defender\MsMpEng.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\Explorer.EXE
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\LEXPPS.EXE
C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
C:\Program Files\Bonjour\mDNSResponder.exe
C:\Program Files\Common Files\Authentium\AntiVirus\dvpapi.exe
C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
C:\WINDOWS\System32\svchost.exe
C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
C:\WINDOWS\system32\fxssvc.exe
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Program Files\Support.com\bin\tgcmd.exe
C:\progra~1\digstr~1\playho~1.exe
C:\Program Files\Dell\Media Experience\PCMService.exe
C:\PROGRA~1\MUSICM~1\MUSICM~2\MMDiag.exe
C:\Program Files\MUSICMATCH\MUSICMATCH Jukebox\mim.exe
C:\Program Files\Common Files\Microsoft Shared\Works Shared\WkUFind.exe
C:\Program Files\iTunes\iTunesHelper.exe
C:\WINDOWS\system32\igfxpers.exe
C:\WINDOWS\system32\hkcmd.exe
C:\WINDOWS\System32\DSentry.exe
C:\WINDOWS\system32\dla\tfswctrl.exe
C:\Program Files\Dell AIO Printer A940\dlbabmgr.exe
C:\Program Files\Dell AIO Printer A940\dlbabmon.exe
C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\iPod\bin\iPodService.exe
C:\Documents and Settings\Greg\Desktop\HiJackThis.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Internet Explorer\IEXPLORE.EXE

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell4me.com/myway
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Program Files\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O2 - BHO: Windows Live Sign-in Helper - {9030D464-4C02-4ABF-8ECC-5164760863C6} - C:\Program Files\Common Files\Microsoft Shared\Windows Live\WindowsLiveLogin.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - (no file)
O2 - BHO: Google Toolbar Notifier BHO - {AF69DE43-7D58-4638-B6FA-CE66B5AD205D} - C:\Program Files\Google\GoogleToolbarNotifier\5.1.1309.3572\swg.dll
O2 - BHO: Windows Live Toolbar Helper - {BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\Windows Live Toolbar\msntb.dll
O2 - BHO: (no name) - {FDD3B846-8D59-4ffb-8758-209B6AD74ACC} - (no file)
O3 - Toolbar: Yahoo! Toolbar - {EF99BD32-C1FB-11D2-892F-0090271D4F88} - C:\Program Files\Yahoo!\Companion\Installs\cpn\yt.dll
O3 - Toolbar: Windows Live Toolbar - {BDAD1DAD-C946-4A17-ADC1-64B5B4FF55D0} - C:\Program Files\Windows Live Toolbar\msntb.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - (no file)
O4 - HKLM\..\Run: [WinFaxAppPortStarter] wfxsnt40.exe
O4 - HKLM\..\Run: [Windows Defender] "C:\Program Files\Windows Defender\MSASCui.exe" -hide
O4 - HKLM\..\Run: [UpdateManager] "C:\Program Files\Common Files\Sonic\Update Manager\sgtray.exe" /r
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [tgcmd] "C:\Program Files\Support.com\bin\tgcmd.exe" /server /startmonitor /deaf
O4 - HKLM\..\Run: [SchedulingAgent] mstinit.exe /firstlogon
O4 - HKLM\..\Run: [QuickTime Task] "C:\Program Files\QuickTime\qttask.exe" -atboottime
O4 - HKLM\..\Run: [PlayhouseDisneyDownloadManager] c:\progra~1\digstr~1\playho~1.exe
O4 - HKLM\..\Run: [PCMService] "C:\Program Files\Dell\Media Experience\PCMService.exe"
O4 - HKLM\..\Run: [OM2_Monitor] "C:\Program Files\OLYMPUS\OLYMPUS Master 2\FirstStart.exe" /OM
O4 - HKLM\..\Run: [MimBoot] C:\PROGRA~1\MUSICM~1\MUSICM~2\mimboot.exe
O4 - HKLM\..\Run: [Microsoft Works Update Detection] C:\Program Files\Common Files\Microsoft Shared\Works Shared\WkUFind.exe
O4 - HKLM\..\Run: [iTunesHelper] "C:\Program Files\iTunes\iTunesHelper.exe"
O4 - HKLM\..\Run: [IMJPMIG8.1] "C:\WINDOWS\IME\imjp8_1\IMJPMIG.EXE" /Spoil /RemAdvDef /Migration32
O4 - HKLM\..\Run: [IMEKRMIG6.1] C:\WINDOWS\ime\imkr6_1\IMEKRMIG.EXE
O4 - HKLM\..\Run: [IgfxTray] C:\WINDOWS\system32\igfxtray.exe
O4 - HKLM\..\Run: [igfxpers] C:\WINDOWS\system32\igfxpers.exe
O4 - HKLM\..\Run: [igfxhkcmd] C:\WINDOWS\system32\hkcmd.exe
O4 - HKLM\..\Run: [HotKeysCmds] C:\WINDOWS\System32\hkcmd.exe
O4 - HKLM\..\Run: [DVDSentry] C:\WINDOWS\System32\DSentry.exe
O4 - HKLM\..\Run: [dla] C:\WINDOWS\system32\dla\tfswctrl.exe
O4 - HKLM\..\Run: [Dell AIO Printer A940] "C:\Program Files\Dell AIO Printer A940\dlbabmgr.exe"
O4 - HKLM\..\Run: [AppleSyncNotifier] C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleSyncNotifier.exe
O4 - HKLM\..\Run: [Adobe Photo Downloader] "C:\Program Files\Adobe\Photoshop Album Starter Edition\3.0\Apps\apdproxy.exe"
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\GoogleToolbarNotifier.exe
O4 - HKCU\..\Run: [updateMgr] "C:\Program Files\Adobe\Acrobat 7.0\Reader\AdobeUpdateManager.exe" AcRdB7_0_7 -reboot 1
O4 - HKCU\..\Run: [OM2_Monitor] "C:\Program Files\OLYMPUS\OLYMPUS Master 2\MMonitor.exe" -NoStart
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [MoneyAgent] "C:\Program Files\Microsoft Money\System\mnyexpr.exe"
O4 - HKCU\..\Run: [DellSupport] "C:\Program Files\DellSupport\DSAgnt.exe" /startup
O4 - HKUS\.DEFAULT\..\Run: [MySpaceIM] C:\Program Files\MySpace\IM\MySpaceIM.exe (User 'Default user')
O4 - HKUS\.DEFAULT\..\Run: [msnmsgr] "C:\Program Files\MSN Messenger\msnmsgr.exe" /background (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [RealUpgradeHelper] "C:\Program Files\Common Files\Real\Update_OB\upgrdhlp.exe" "RealNetworks|RealPlayer|6.0" (User 'Default user')
O8 - Extra context menu item: &Windows Live Search - res://C:\Program Files\Windows Live Toolbar\msntb.dll/search.htm
O8 - Extra context menu item: Add to Windows &Live Favorites - http://favorites.live.com/quickadd.aspx
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MI1933~1\Office10\EXCEL.EXE/3000
O8 - Extra context menu item: Open in new background tab - res://C:\Program Files\Windows Live Toolbar\Components\en-us\msntabres.dll.mui/229?f70deb8009ef452aae5575463885098c
O8 - Extra context menu item: Open in new foreground tab - res://C:\Program Files\Windows Live Toolbar\Components\en-us\msntabres.dll.mui/230?f70deb8009ef452aae5575463885098c
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\System32\shdocvw.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\WINDOWS\System32\shdocvw.dll
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\System32\Shdocvw.dll
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O11 - Options group: [international] International
O16 - DPF: {17492023-c23a-453e-a040-c7c580bbf700} (Windows Genuine Advantage Validation Tool) - http://go.microsoft.com/fwlink/?linkid=39204
O16 - DPF: {406B5949-7190-4245-91A9-30A17DE16AD0} (Snapfish Activia) - http://photo2.walgreens.com/WalgreensActivia.cab
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\bin\AppleMobileDeviceService.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: DSBrokerService (dsbrokerservice) - Unknown owner - C:\Program Files\DellSupport\brkrsvc.exe
O23 - Service: DvpApi (dvpapi) - Authentium, Inc. - C:\Program Files\Common Files\Authentium\AntiVirus\dvpapi.exe
O23 - Service: Google Software Updater (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: Intel NCS NetService (NetSvc) - Intel® Corporation - C:\Program Files\Intel\NCS\Sync\NetSvc.exe
O23 - Service: Symantec Network Drivers Service (SNDSrvc) - Symantec Corporation - C:\Program Files\Common Files\Symantec Shared\SNDSrvc.exe
O23 - Service: Symantec Core LC - Unknown owner - C:\Program Files\Common Files\Symantec Shared\CCPD-LC\symlcsvc.exe
O24 - Desktop Component 0: (no name) - http://www.fastcoolrides.com/mercedes_sclass_3.jpg2.jpg

--
End of file - 9884 bytes

Greetings.

To get you fixed up please follow the instructions here:
I'm infected - What do I do now?

And post your logs in a new topic here:
Malware Removal - HijackThis Logs

Please be sure not to install any software or use any removal or scanning tools exept those that you are
instructed to by the expert who will be assisting you as doing so can make their job much more difficult.

note: if for some reason you are unable to run some or any of the tools in the first link, then skip that step and move on to the next one.
If you can't even run HijackThis, then just post here: Malware Removal - HijackThis Logs describing your issues and an expert will reply with further instructions.

I hope I was helpful. Good luck and safe surfing.

One of the mods. moved the thread over to HiJackLog forum at 9:52am