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Twain-Tech and biprep.exe - Easily eliminate this problem

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What is Twain-Tech? Technical details of Twain-Tech problem and biprep.exe file

Manual solution methods

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Threat's profile

Threat indicator: HIGH
Name of the threat: Twain-Tech
Command or file name: biprep.exe
Threat type: Adware
Affected OS: Win32 (Windows 9x, Windows XP, Windows Vista)

Intrusion method

This threat copies its file(s) to your hard disk. Its typical file name is Twain-Tech. Then it creates new startup key with name Twain-Tech and value biprep.exe. You can also find it in your processes list with name biprep.exe or Twain-Tech.

If you have further questions about this threat, please fill in the form below and we'll contact you shortly.

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How to fix Twain-Tech

This problem can be solved manually by deleting all registry keys and files connected with this software, removing it from starup list and unregistering all corresponding DLLs. Additionally missing DLL's should be restored from distribution in case they are corrupted by Twain-Tech. To fix this threat, you should:

1. Kill the following processes and delete the appropriate files:

• acmparse.dll
• biprep.exe
• b_371_0_1_585800.htm
• ft1_01_0_279_gepfah.exe
• multimpp.dll
• multimpp.dll.bak
• oyyilj8kl.exe
• smdat32a.sys
• smdat32m.sys
• twaintec.ini
• twtini.inf
• uduftm.exe
• wast2.exe
• wsebate1.exe
• wsem218.dll
• xgn.exe

Warning: you should delete only those files which checksums are listed as malicious. There may be valid files with the same names in your system. We recommend you to use True Sword for safe problem solution.

2. Delete the following malicious folders:

• C:\Documents and Settings\User\local settings\temp\thi2eec.tmp\
• %favorites%\adult sites\
• %favorites%\adult sites\amateur\
• %favorites%\adult sites\gay\
• %favorites%\adult sites\hardcore\
• %favorites%\adult sites\latin\
• %favorites%\adult sites\mature\
• %favorites%\adult sites\reality\
• %favorites%\adult sites\teen\
• %favorites%\adult sites\upskirt\
• %favorites%\adult sites\voyeur\
• %favorites%\free adult content\
• %favorites%\free adult content\daily movies\
• %favorites%\free adult content\daily pictures\
• C:\Documents and Settings\User\thi****.tmp\

3. Delete the following malicious registry entries and\or values:

• Key: CLSID\{0000607D-D204-42C7-8E46-216055BF9918}

• Key: software\microsoft\windows\currentversion\explorer\browser helper objects\{000020dd-c72e-4113-af77-dd56626c6c42}
  Value: @

• Key: software\microsoft\windows\currentversion\explorer\browser helper objects\{0000607d-d204-42c7-8e46-216055bf9918}
  Value: @

• Key: software\classes\clsid\{000020dd-c72e-4113-af77-dd56626c6c42}
  Value: @

• Key: SOFTWARE\Classes\CLSID\{0000607D-D204-42C7-8E46-216055BF9918}

• Key: SOFTWARE\Classes\TwaintecDll.TwaintecDllObj.1

• Key: software\microsoft\windows\currentversion\explorer\browser helper objects\{000020dd-c72e-4113-af77-dd56626c6c42}

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{0000607D-D204-42C7-8E46-216055BF9918}

• Key: software\microsoft\windows\currentversion\explorer\browser helper objects\{fa1a048a-3b99-4b86-9ece-5f7c197cbf39}
  Value: @

• Key: software\microsoft\windows\currentversion\run\oyyilj8kl
  Value: @

• Key: software\microsoft\windows\currentversion\run\xgn
  Value: @

• Key: software\microsoft\windows\currentversion\uninstall\twaintec\displayname
  Value: @

• Key: software\microsoft\windows\currentversion\uninstall\twaintec\uninstallstring
  Value: @

• Key: SOFTWARE\twaintec

• Key: software\twaintec\tt4c5ntrstransac
  Value: @

• Key: software\twaintec\tt4n5a6tionscode
  Value: @

• Key: software\twaintec\ttc1o4d5eofsfinalad
  Value: @

• Key: software\twaintec\ttc4n5tfyl
  Value: @

• Key: software\twaintec\ttc4n5trmsgsdisp
  Value: @

• Key: software\twaintec\ttc4n5trsevnt
  Value: @

• Key: software\twaintec\ttc4s5insur
  Value: @

• Key: software\twaintec\ttc4u5rrentsmode
  Value: @

• Key: software\twaintec\ttd4s5tschost
  Value: @

• Key: software\twaintec\ttd4s5tscpath
  Value: @

• Key: software\twaintec\ttd4s5tssend
  Value: @

• Key: software\twaintec\tti4d5ofsdist
  Value: @

• Key: software\twaintec\tti4d5ofsinst
  Value: @

• Key: software\twaintec\tti4g5nores
  Value: @

• Key: software\twaintec\tti4n5progscab
  Value: @

• Key: software\twaintec\tti4n5progsex
  Value: @

• Key: software\twaintec\tti4n5progslstest
  Value: @

• Key: software\twaintec\ttl3a4stmotssday
  Value: @

• Key: software\twaintec\ttl3a4stsschckin
  Value: @

• Key: software\twaintec\ttm4o5dessync
  Value: @

• Key: software\twaintec\tts4t5atusofsinst
  Value: @

• Key: software\twaintec\tts4t5i6cky1s
  Value: @

• Key: software\twaintec\tts4t5icky2s
  Value: @

• Key: software\twaintec\ttt4h5rshsbath
  Value: @

• Key: software\twaintec\ttt4h5rshschecksin
  Value: @

• Key: software\twaintec\ttt4h5rshsmots
  Value: @

• Key: software\twaintec\ttt4h5rshsyssinf
  Value: @

• Key: software\twaintec\ttt4i5m6eofsfinalad
  Value: @

• Key: software\twaintec\ttt4o5plistspos
  Value: @

• Key: CLSID\{000020dd-c72e-4113-af77-dd56626c6c42}

• Key: clsid\{386a771c-e96a-421f-8ba7-32f1b706892f}

• Key: SOFTWARE\Classes\MxTargetDll.MxTargetDllObj

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\twaintec

• Key: Software\MxTarget

• Key: software\microsoft\internet explorerinternet0%\Search
  Value: CustomizeSearch

Warning: If value is listed for some registry entries, you should only clear these values and leave keys with such values untouched. We recommend you to use True Sword for safe problem solution.

 

 

Here are the descriptions of problems connected with Twain-Tech and biprep.exe we received earlier:

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Online update

Date: November 21, 2008

Threats: 217 556


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