Overall Risk Level:
W32.Korron.A can reduce security settings on the infected computer. This worm spreads through removable storage drives.
Other Alias: Worm.Ronkor
Threat Level: Low
Systems Affected: Windows – All
Source: Symantec
How to Remove W32.Korron.A:
On this page is our suggested (by precisesecurity) removal procedure and Visitor's own suggestion. We cannot control and evaluate each suggested procedure so please use it at your own risks. If no suggestion is present to remove virus, spyware, adware and malware, you may try the following:- Scan W32.Korron.A with MalwareByte's Anti-Malware
- Remove W32.Korron.A with Standard Virus Scan
One Response for "W32.Korron.A"
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. Download and run Symantec Tool to reset registry. Click here.
6. Delete/Modify any values added to the registry. [how to edit registry]
Navigate to and delete the following entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
\”LoggonAdministrator” = “%SystemDrive%\Documents and Settings\Administrator\Local Settings
\Application Data\WINDOWS\WINLOGON.EXE”
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
\”Sysmontrng” = “C:\Documents and Settings\Administrator\Local Settings
\Application Data\WINDOWS\SERVICE.EXE”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
\”r0nk0r” = “C:\WINDOWS\r0nk0r.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
\”MSMSGS” = “C:\Documents and Settings\Administrator\Local Settings\Application Data
\WINDOWS\WINLOGON.EXE”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
\”ServiceAdministrator” = “C:\Documents and Settings\Administrator\Local Settings
\Application Data\WINDOWS\SERVICES.EXE”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\lnkfile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\docfile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\xlsfile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer
\”LimitSystemRestoreCheckpointing” = “1″
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Installer
\”DisableMSI” = “1″
HKEY_CURRENT_USER\Control Panel\Desktop\”SCRNSAVE.EXE” = “C:\WINDOWS
\system32\MRHELL~1.SCR”
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore
\”DisableConfig” = “1″
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore
\”DisableSR” = “1″
Restore the following registry entries to their original values, if required:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
\”Userinit” = “C:\WINDOWS\system32\userinit.exe,”
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
\”Userinit” = “C:\WINDOWS\system32\userinit.exe,C:\WINDOWS\system32\IExplorer.exe”
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
\”Shell” = “Explorer.exe “C:\WINDOWS\system32\IExplorer.exe”"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\batfile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\comfile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\exefile\”(default)” = “File Folder”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\exefile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\piffile\shell\open\command
\”(default)” = “”C:\WINDOWS\system32\shell.exe” “%1″ %*”
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
\AeDebug\”Auto” = “1″
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
\AeDebug\”Debugger” = “”C:\WINDOWS\system32\Shell.exe”"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\SafeBoot
\”AlternateShell” = “C:\WINDOWS\r0nk0r.exe”
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SafeBoot
\”AlternateShell” = “C:\WINDOWS\r0nk0r.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
\Advanced\”Hidden” = “0″
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
\Advanced\”HideFileExt” = “1″
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
\Advanced\”ShowSuperHidden” = “0″
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
\Explorer\”NoFolderOptions” = “1″
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
\System\”DisableCMD” = “1″
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies
\Explorer\”NoFolderOptions” = “1″
7. Exit registry editor and restart the computer.
8. 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.
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