W32.Korron.B spreads by creating a duplicate copy of the theat on all drives accessible to infected computer. W32.Korron.B will replace various files with its own malicious version.

Alias: -

Damage Level: Low

Systems Affected: Windows

Manual Removal of W32.Korron.B

1. Temporarily Disable System Restore (Windows Me/XP). [how to]
2. Update the virus definitions.
3. Reboot computer in SafeMode [how to]
4. Run a full system scan and clean/delete all infected file(s)
5. Delete/Modify any values added to the registry. [how to edit registry]

Navigate to and delete the following registry entries:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrent VersionRun”LogonAdministrator” = “C:Documents and SettingsAdministratorLocal SettingsApplication DataWINDOWSCSRSS.EXE”

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrent VersionRun”System Monitoring” = “C:Documents and SettingsAdministratorLocal SettingsApplication DataWINDOWSLSASS.EXE”

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionRun49U5T1N4″ = “C:WINDOWS49U5T1N4.exe”

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionRunMSMSGS” = “C:Documents and SettingsAdministratorLocal SettingsApplication DataWINDOWSWINLOGON.EXE”

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionRunServiceAdministrator” = “C:Documents and SettingsAdministratorLocal SettingsApplication DataWINDOWSSERVICES.EXE”

HKEY_LOCAL_MACHINESOFTWAREClassesinifileshellopencommand”" = “”C:WINDOWSsystem32shell.exe” “%1″ %*”

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrent VersionSystemFileProtection”ShowPopups” = “0″

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows Installer”LimitSystemRestoreCheckpointing” = “1″

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows Installer”DisableMSI” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesSystemDisableCMD” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesSystemDisableTaskMgr” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesSystemDisableRegistryTools” = “1″

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrent Versionpoliciessystem”DisableTaskMgr” = “1″

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrent Versionpoliciessystem”DisableRegistryTools” = “1″

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows NTSystemRestore”DisableConfig” = “1″

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows NTSystemRestore”DisableSR” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoRun” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoLogoff” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoFind” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoTrayContextMenu” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoViewContextMenu” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionExplorerAdvanced”ShowSuperHidden” = “0″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoFolderOptions” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoClose” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoDesktop” = “1″

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrent VersionpoliciesExplorer”NoFolderOptions” = “1″

Navigate to and restore the following registry entries to their previous values, if required:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogon”Shell” = “Explorer.exe “C:WINDOWSsystem32IExplorer.exe”"

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrent VersionWinlogon”Userinit” = “C:WINDOWSsystem32userinit.exe,C:WINDOWSsystem32IExplorer.exe”

HKEY_LOCAL_MACHINESOFTWAREClassesbatfileshellopencommand”" = “”C:WINDOWSsystem32shell.exe” “%1″ %*”

HKEY_LOCAL_MACHINESOFTWAREClassescomfileshellopencommand”" = “”C:WINDOWSsystem32shell.exe” “%1″ %*”

HKEY_LOCAL_MACHINESOFTWAREClassesExcel.Sheet.8″” = “Application”

HKEY_LOCAL_MACHINESOFTWAREClassesExcel.Sheet.8DefaultIcon”" = “C:WINDOWS49U5T1N4.exe”

HKEY_LOCAL_MACHINESOFTWAREClassesexefile”" = “Microsoft Corporation”

HKEY_LOCAL_MACHINESOFTWAREClassespiffileshellopencommand”" = “”C:WINDOWSsystem32shell.exe” “%1″ %*”

HKEY_LOCAL_MACHINESOFTWAREClassesWord.Document.8″” = “Application”

HKEY_LOCAL_MACHINESOFTWAREClassesWord.Document.8DefaultIcon”" = “C:WINDOWS49U5T1N4.exe”

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrent VersionAeDebug”Auto” = “1″

HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrent VersionAeDebug”Debugger” = “”C:WINDOWSsystem32Shell.exe”"

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSafeBoot “AlternateShell” = “C:WINDOWS49U5T1N4.exe”

HKEY_CURRENT_USERControl PanelDesktop”SCRNSAVE.EXE” = “C:WINDOWSsystem32COOLLM~1.SCR”

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionExplorerAdvanced”Hidden” = “1″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionExplorerAdvanced”HideFileExt” = “0″

HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrent VersionPoliciesExplorer”NoDriveTypeAutoRun” = “0×000000B5″

6. Exit registry editor and restart the computer.
7. In order to make sure that threat is completely eliminated from your computer, carry out a full scan of your computer using AntiVirus and Antispyware Software. Another way to delete the virus using various Antivirus Program without the need to install can be done with Online Virus Scanner.