Get rid of NavExcel and navapp.exe

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Specification and description of NavExcel and ways to repair navapp.exe file

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Threat's dossier

	Name of the threat: NavExcel
	Command or file name: navapp.exe
	Threat type: Badware
	Affected OS: Win32 (Windows 9x, Windows XP, Windows Vista)

Ways for invasion

The ingressed threat makes its copy on your computer and launches NavExcel system process using the names similar to navapp.exe or NavExcel. It initiates a creation of new startup key under the name NavExcel and value navapp.exe.

If you need more information about navapp.exe you should contact to us with the form above .

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Manual solution of NavExcel problem

In order to make progress in getting rid of navapp.exe manually you should delete all files assosiated with NavExcel infection, including destruction of its registry keys and invalid DLLs. It is also recommended to delete files with names similar to NavExcel from startup list. Sometimes NavExcel can corrupt DLLs that can become a cause of unstability of your Windows. You will have to recover it from distribution to make it work correctly.To get rid of this threat, be assured to follow next points:

1. Destroy the malicious process and all associated files:

• navexcel.txt
• navexcelbar.dll
• nhelper.dll
• nhelper.htm
• nhuninstaller.exe
• nhuninstaller.exe-02d4f01f.pf
• nhupdater.exe
• nxstinst.exe
• remover.dll
• rundll32.exe-3ae7dc34.pf.
• v2.0.4c.cab

Notification: Be careful while deleting anything from system files. This is dangerous to destroy a valid process that can carry result in Windows disfunction. It is a cute trick of malware to hide behind valid files and use some names similar to the ones DLLs use. To escape unpredictable results we suggest you to use True Sword to ensure your system.

2. Destroy all assosiated malware:

• C:\Program Files\navexcel\navhelper\v2.0.4c\
• C:\Program Files\nh\
• C:\Documents and Settings\User\fleok\
• C:\Program Files\navexcel\
• C:\Program Files\navexcel\navhelper\
• C:\Program Files\navexcel\navhelper\v2.0.2\
• C:\Program Files\navexcel search toolbar\
• C:\Program Files\navexcel\navhelper\v2.0.4\
• C:\Program Files\navexcel\navhelper\v2.0.4c\

3. Clean up all infected registry keys and\or values:

• Key: CLSID\{b5ef836b-7582-4d82-9246-17f6c40ddf0f}

• Key: clsid\{c1e58a84-95b3-4630-b8c2-d06b77b7a0fc} appid {710bcb5b-8c6c-483e-a4f5-faf083b13184}
  Value: @

• Key: navexcel.navhelper navhelper class\software\classes\navexcel.navhelper
  Value: @

• Key: navexcel.navhelper.1 navhelper class
  Value: @

• Key: software\microsoft\windows\currentversion\explorer\browser helper objects\{c1e58a84-95b3-4630-b8c2-d06b77b7a0fc}
  Value: @

• Key: software\classes\appid\nhelper.dll\appid
  Value: @

• Key: SOFTWARE\Classes\CLSID\{C1E58A84-95B3-4630-B8C2-D06B77B7A0FC}

• Key: software\classes\clsid\{c1e58a84-95b3-4630-b8c2-d06b77b7a0fc}\appid
  Value: @

• Key: software\classes\interface\{20f36af3-3486-4bb6-8bcb-f1f8abe74d07}
  Value: @

• Key: software\classes\typelib\{fa4de133-d3c3-4ed4-92d1-cd4dde839ab3}
  Value: @

• Key: SOFTWARE\Microsoft\Code Store Database\Distribution Units\NavCab

• Key: software\microsoft\code store database\distribution units\navcab\contains\files\c:\windows\downloaded program files\conflict.1\navinst2.ocx
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\contains\files\c:\windows\downloaded program files\conflict.2\navinst2.ocx
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\contains\files\c:\windows\downloaded program files\conflict.4\navinst2.ocx
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\contains\files\c:\windows\downloaded program files\navinst2.ocx
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\downloadinformation\codebase
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\downloadinformation\osd
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\installedversion
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\installedversion\lastmodified
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\installer
  Value: @

• Key: software\microsoft\code store database\distribution units\navcab\systemcomponent
  Value: @

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{C1E58A84-95B3-4630-B8C2-D06B77B7A0FC}

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/conflict.1/navinst2.ocx\.owner
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/conflict.1/navinst2.ocx\navcab
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/conflict.2/navinst2.ocx\.owner
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/conflict.2/navinst2.ocx\navcab
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/conflict.4/navinst2.ocx\.owner
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/conflict.4/navinst2.ocx\navcab
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/navinst2.ocx\.owner
  Value: @

• Key: software\microsoft\windows\currentversion\moduleusage\c:/windows/downloaded program files/navinst2.ocx\navcab
  Value: @

• Key: software\microsoft\windows\currentversion\shareddlls\c:\windows\downloaded program files\conflict.4\navinst2.ocx
  Value: @

• Key: SOFTWARE\NavExcel

• Key: software\navexcel\navhelper\v2.0.4c nhelper.dll nhelper.dll\software\classes\navexcel.navhelper
  Value: @

• Key: software\navexcel\navhelper\v2.0.4c\nhelper.dll
  Value: @

• Key: software\navexcel\navhelper\v2.0.4c\nhelper.htm
  Value: @

• Key: software\navexcel\navhelper\v2.0.4c\nhuninstaller.exe
  Value: @

• Key: software\navexcel\navhelper\v2.0.4c\nhupdater.exe
  Value: @

• Key: software\navexcel\navhelper\v2.0.4c\v2.0.4c.cab
  Value: @

• Key: AppID\{710BCB5B-8C6C-483E-A4F5-FAF083B13184}

• Key: CLSID\{5AA06644-BC46-4220-A460-47A6EB47C96D}

• Key: Interface\{20F36AF3-3486-4BB6-8BCB-F1F8ABE74D07}

• Key: navexcel.navhelper

• Key: navexcel.navhelper.1

• Key: navinst2.ocx

• Key: navinstaller2.installer

• Key: navinstaller2.installer.1

• Key: nhelper.dll

• Key: TYPELIB\{2f9ce842-f13d-41cb-a977-378ad75f11af}

• Key: TypeLib\{FA4DE133-D3C3-4ED4-92D1-CD4DDE839AB3}

• Key: TypeLib\{209B1CEA-8B2E-4596-9B35-A4A7DB611EB2}\1.0

• Key: TypeLib\{209B1CEA-8B2E-4596-9B35-A4A7DB611EB2}\1.0\FLAGS

• Key: TypeLib\{209B1CEA-8B2E-4596-9B35-A4A7DB611EB2}\1.0\0\win32

• Key: TypeLib\{209B1CEA-8B2E-4596-9B35-A4A7DB611EB2}\1.0\HELPDIR

• Key: Interface\{508EBE65-E39D-4363-8041-E647B4F6F4E1}

• Key: Interface\{508EBE65-E39D-4363-8041-E647B4F6F4E1}\ProxyStubClsid

• Key: Interface\{508EBE65-E39D-4363-8041-E647B4F6F4E1}\ProxyStubClsid32

• Key: Interface\{508EBE65-E39D-4363-8041-E647B4F6F4E1}\TypeLib
  Value: Version

• Key: Interface\{4D6CED50-D6AE-40DA-B87F-235593FC1F28}

• Key: Interface\{4D6CED50-D6AE-40DA-B87F-235593FC1F28}\ProxyStubClsid

• Key: Interface\{4D6CED50-D6AE-40DA-B87F-235593FC1F28}\ProxyStubClsid32

• Key: Interface\{4D6CED50-D6AE-40DA-B87F-235593FC1F28}\TypeLib
  Value: Version

• Key: SOFTWARE\NavExcel Ltd\NavExcel Search Toolbar\InstallShow

• Key: SOFTWARE\NavExcel Ltd\NavExcel Search Toolbar\InstallPosition

• Key: SOFTWARE\NavExcel Ltd\NavExcel Search Toolbar\ShowIntro

• Key: Software\NavExcel Ltd\NavExcel Search Toolbar\LastUpdateCheck

• Key: CLSID\{5AA06644-BC46-4220-A460-47A6EB47C96D}\ProgID

• Key: CLSID\{5AA06644-BC46-4220-A460-47A6EB47C96D}\VersionIndependentProgID

• Key: CLSID\{5AA06644-BC46-4220-A460-47A6EB47C96D}\InprocServer32
  Value: ThreadingModel

• Key: CLSID\{5AA06644-BC46-4220-A460-47A6EB47C96D}\TypeLib

• Key: CLSID\{D80C4E21-C346-4E21-8E64-20746AA20AEB}

• Key: CLSID\{D80C4E21-C346-4E21-8E64-20746AA20AEB}\ProgID

• Key: CLSID\{D80C4E21-C346-4E21-8E64-20746AA20AEB}\VersionIndependentProgID

• Key: CLSID\{D80C4E21-C346-4E21-8E64-20746AA20AEB}\InprocServer32
  Value: ThreadingModel

• Key: CLSID\{D80C4E21-C346-4E21-8E64-20746AA20AEB}\TypeLib

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NavExcel Search Toolbar
  Value: DisplayName

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NavExcel Search Toolbar
  Value: UninstallString

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NavExcel Search Toolbar
  Value: NoModify

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NavExcel Search Toolbar
  Value: NoRepair

• Key: SOFTWARE\NavExcel Ltd\NavExcel Search Toolbar
  Value: AutoUpdate

• Key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NavExcel Search Toolbar
  Value: UninstallString

• Key: software\NavExcel Ltd\\NavExcel Search Toolbar
  Value: SList

• Key: software\NavExcel Ltd\\NavExcel Search Toolbar
  Value: InstallShow

• Key: software\NavExcel Ltd\\NavExcel Search Toolbar
  Value: Updating

• Key: software\NavExcel Ltd\\NavExcel Search Toolbar
  Value: AutoUpdate

• Key: software\NavExcel Ltd\\NavExcel Search Toolbar
  Value: LastSearch

• Key: Software\Microsoft\Internet Explorer\Toolbar
  Value: {5AA06644-BC46-4220-A460-47A6EB47C96D}

Notification: It is unsafe to make any changes amongst registry entries when you are not sure what to do. It is strongly recommended to keep out of them. You should only delete registry entries using professional guidance. If you use True Sword you will have no need in manual changes in Registry.

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