Not sure what these files are, but they are suspicious. Can't find any other references to them on the web. I've already cleaned the PC manually by removing the suspicious files and replacing them with legitimate dsauth.dll files using ERD Commander. There are many registry references to dsauthj.dll in the CLSID keys (and winlogon) I have yet to look at.

Thanks

Here is the HJT log:

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 3:26:40 PM, on 5/9/2008
Platform: Windows XP SP2 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.16640)
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:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\LEXPPS.EXE
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\Trend Micro\Client Server Security Agent\ntrtscan.exe
C:\WINDOWS\system32\HPZipm12.exe
C:\WINDOWS\system32\svchost.exe
C:\Program Files\Trend Micro\Client Server Security Agent\tmlisten.exe
C:\Program Files\Trend Micro\Client Server Security Agent\OfcPfwSvc.exe
C:\WINDOWS\TEMP\RI7DBB.EXE
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\rdpclip.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Trend Micro\Client Server Security Agent\pccntmon.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
C:\Program Files\HP\Digital Imaging\bin\hpqgalry.exe
C:\Program Files\Internet Explorer\iexplore.exe
C:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.dell4me.com/mywaybiz
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = http://bfc.myway.com/search/de_srchlft.html
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.dell4me.com/mywaybiz
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\Internet Explorer\Main,First Home Page = http://www.dell.com
R3 - URLSearchHook: (no name) - {4D25F926-B9FE-4682-BF72-8AB8210D6D75} - (no file)
O2 - BHO: Adobe PDF Reader Link Helper - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Adobe\Acrobat 7.0\ActiveX\AcroIEHelper.dll
O2 - BHO: (no name) - {199130DE-E120-4F5E-A0E8-F1572A160536} - c:\windows\system32\dsauthj.dll
O2 - BHO: DriveLetterAccess - {5CA3D70E-1895-11CF-8E15-001234567890} - C:\WINDOWS\system32\dla\tfswshx.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O2 - BHO: Google Toolbar Helper - {AA58ED58-01DD-4d91-8333-CF10577473F7} - c:\program files\google\googletoolbar4.dll
O3 - Toolbar: &Google - {2318C2B1-4965-11d4-9B18-009027A5CD4F} - c:\program files\google\googletoolbar4.dll
O4 - HKLM\..\Run: [OfficeScanNT Monitor] "C:\Program Files\Trend Micro\Client Server Security Agent\pccntmon.exe" -HideWindow
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O4 - HKCU\..\Run: [swg] C:\Program Files\Google\GoogleToolbarNotifier\1.2.1128.5462\GoogleToolbarNotifier.exe
O4 - HKUS\S-1-5-18\..\Run: [ALUAlert] C:\Program Files\Symantec\LiveUpdate\ALUNotify.exe (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [TSClientMSIUninstaller] cmd.exe /C "cscript %systemroot%\Installer\TSClientMsiTrans\tscuinst.vbs" (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [ALUAlert] C:\Program Files\Symantec\LiveUpdate\ALUNotify.exe (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [TSClientMSIUninstaller] cmd.exe /C "cscript %systemroot%\Installer\TSClientMsiTrans\tscuinst.vbs" (User 'Default user')
O4 - Global Startup: HP Digital Imaging Monitor.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqtra08.exe
O4 - Global Startup: HP Image Zone Fast Start.lnk = C:\Program Files\HP\Digital Imaging\bin\hpqthb08.exe
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~2\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Sun Java Console - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_05\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~2\OFFICE11\REFIEBAR.DLL
O9 - Extra button: Real.com - {CD67F990-D8E9-11d2-98FE-00C0F0318AFE} - C:\WINDOWS\system32\Shdocvw.dll
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
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
O16 - DPF: {56762DEC-6B0D-4AB4-A8AD-989993B5D08B} (OnlineScanner Control) - http://www.eset.eu/buxus/docs/OnlineScanner.cab
O16 - DPF: {6E32070A-766D-4EE6-879C-DC1FA91D2FC3} (MUWebControl Class) - http://update.microsoft.com/microsoftupdate/v6/V5Controls/en/x86/client/muweb_site.cab?1135788238796
O16 - DPF: {8CE3BAE6-AB66-40B6-9019-41E5282FF1E2} (QuickBooks Online Edition Utilities Class v - https://accounting.quickbooks.com/c1/v14.201/qboax8.cab
O16 - DPF: {AECD14A8-F662-11D1-A395-00805F535788} (Plotwon Control) - http://www.investors.com/member/ocx/plotwon.ocx
O16 - DPF: {FA91DF8D-53AB-455D-AB20-F2F023E498D3} (RSClientPrint Class) - http://gis2.tpwd.state.tx.us/ReportServer?rs:Command=Get&rc:GetImage=8.00.1038.00rsclientprint.cab
O17 - HKLM\System\CCS\Services\Tcpip\Parameters: Domain = ecomm.local
O17 - HKLM\Software\..\Telephony: DomainName = ecomm.local
O17 - HKLM\System\CCS\Services\Tcpip\..\{3983CD7D-700A-4B34-9EF5-108948509507}: Domain = ecomm.local
O17 - HKLM\System\CS1\Services\Tcpip\Parameters: Domain = ecomm.local
O17 - HKLM\System\CS1\Services\Tcpip\..\{3983CD7D-700A-4B34-9EF5-108948509507}: Domain = ecomm.local
O20 - Winlogon Notify: obyfhenk - C:\WINDOWS\SYSTEM32\dsauthj.dll
O23 - Service: DSBrokerService - Unknown owner - C:\Program Files\DellSupport\brkrsvc.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: Trend Micro Client/Server Security Agent RealTime Scan (ntrtscan) - Trend Micro Inc. - C:\Program Files\Trend Micro\Client Server Security Agent\ntrtscan.exe
O23 - Service: Trend Micro Client/Server Security Agent Personal Firewall (OfcPfwSvc) - Trend Micro Inc. - C:\Program Files\Trend Micro\Client Server Security Agent\OfcPfwSvc.exe
O23 - Service: Pml Driver HPZ12 - HP - C:\WINDOWS\system32\HPZipm12.exe
O23 - Service: SupportSoft Sprocket Service (dellsupportcenter) (sprtsvc_dellsupportcenter) - SupportSoft, Inc. - C:\Program Files\Dell Support Center\bin\sprtsvc.exe
O23 - Service: Trend Micro Client/Server Security Agent Listener (tmlisten) - Trend Micro Inc. - C:\Program Files\Trend Micro\Client Server Security Agent\tmlisten.exe

--
End of file - 7409 bytes

[Malware file attachments deleted by moderator.]

dsauthj.dll is malware known as TrojanClicker:Win32/Delf (Microsoft).

Windows Defender will detect this file

dsauthj.dll.bak is probably malware.


I've moved your post to the HijackThis Logs forum.

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