Threat Explorer

The Threat Explorer is a comprehensive resource consumers can turn to for daily, accurate, up-to-date information on the latest threats, risks and vulnerabilities.



24 June 2015
RegClean Pro
Risk Impact:
Systems Affected:


PUA.RegCleanPro is a misleading application that searches for potential problems on the computer.

Note: Virus definitions dated June 23, 2015 or earlier detect this threat as RegCleanPro.

Antivirus Protection Dates

  • Initial Rapid Release version 02 October 2014 revision 022
  • Latest Rapid Release version 08 May 2019 revision 003
  • Initial Daily Certified version 01 July 2014 revision 002
  • Latest Daily Certified version 08 May 2019 revision 006
  • Initial Weekly Certified release date 02 July 2014
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
The program must be downloaded and installed manually.

When the program is installed, it creates the following files:
  • C:\Documents and Settings\All Users\Application Data\systweak\RegClean Pro\Version 6.1\eng_rcp.dat
  • C:\Documents and Settings\All Users\Application Data\systweak\RegClean Pro\Version 6.1\log_MM-DD-YYYY.log
  • C:\Documents and Settings\All Users\Application Data\systweak\ssd\SSDPTstub.exe
  • %UserProfile%\Desktop\RegClean Pro.lnk
  • %UserProfile%\Start Menu\Programs\RegClean Pro\RegClean Pro.lnk
  • %UserProfile%\Start Menu\Programs\RegClean Pro\Register RegClean Pro.lnk
  • %UserProfile%\Start Menu\Programs\RegClean Pro\Uninstall RegClean Pro.lnk
  • %ProgramFiles%\RegClean Pro\Chinese_rcp.ini
  • %ProgramFiles%\RegClean Pro\Chinese_uninst.ini
  • %ProgramFiles%\RegClean Pro\CleanSchedule.exe
  • %ProgramFiles%\RegClean Pro\Danish_rcp.ini
  • %ProgramFiles%\RegClean Pro\Danish_uninst.ini
  • %ProgramFiles%\RegClean Pro\Dutch_rcp.ini
  • %ProgramFiles%\RegClean Pro\Dutch_uninst.ini
  • %ProgramFiles%\RegClean Pro\eng_rcp.ini
  • %ProgramFiles%\RegClean Pro\eng_uninst.ini
  • %ProgramFiles%\RegClean Pro\Finnish_rcp_fi.ini
  • %ProgramFiles%\RegClean Pro\Finnish_uninst_fi.ini
  • %ProgramFiles%\RegClean Pro\French_rcp.ini
  • %ProgramFiles%\RegClean Pro\French_uninst.ini
  • %ProgramFiles%\RegClean Pro\German_rcp.ini
  • %ProgramFiles%\RegClean Pro\German_uninst.ini
  • %ProgramFiles%\RegClean Pro\greek_rcp_el.ini
  • %ProgramFiles%\RegClean Pro\greek_uninst_el.ini
  • %ProgramFiles%\RegClean Pro\install_left_image.bmp
  • %ProgramFiles%\RegClean Pro\isxdl.dll
  • %ProgramFiles%\RegClean Pro\Italian_rcp.ini
  • %ProgramFiles%\RegClean Pro\Italian_uninst.ini
  • %ProgramFiles%\RegClean Pro\Japanese_rcp.ini
  • %ProgramFiles%\RegClean Pro\Japanese_uninst.ini
  • %ProgramFiles%\RegClean Pro\korean_rcp_ko.ini
  • %ProgramFiles%\RegClean Pro\korean_uninst_ko.ini
  • %ProgramFiles%\RegClean Pro\Norwegian_rcp.ini
  • %ProgramFiles%\RegClean Pro\Norwegian_uninst.ini
  • %ProgramFiles%\RegClean Pro\polish_rcp_pl.ini
  • %ProgramFiles%\RegClean Pro\polish_uninst_pl.ini
  • %ProgramFiles%\RegClean Pro\portugese_rcp_pt.ini
  • %ProgramFiles%\RegClean Pro\portugese_uninst_pt.ini
  • %ProgramFiles%\RegClean Pro\Portuguese_rcp.ini
  • %ProgramFiles%\RegClean Pro\Portuguese_uninst.ini
  • %ProgramFiles%\RegClean Pro\RCPUninstall.exe
  • %ProgramFiles%\RegClean Pro\RegCleanPro.dll
  • %ProgramFiles%\RegClean Pro\RegCleanPro.exe
  • %ProgramFiles%\RegClean Pro\russian_rcp_ru.ini
  • %ProgramFiles%\RegClean Pro\russian_uninst_ru.ini
  • %ProgramFiles%\RegClean Pro\Spanish_rcp.ini
  • %ProgramFiles%\RegClean Pro\spanish_uninst.ini
  • %ProgramFiles%\RegClean Pro\SSDPTstub.exe
  • %ProgramFiles%\RegClean Pro\Swedish_rcp.ini
  • %ProgramFiles%\RegClean Pro\swedish_uninst.ini
  • %ProgramFiles%\RegClean Pro\systweakasp.exe
  • %ProgramFiles%\RegClean Pro\TPS.ico
  • %ProgramFiles%\RegClean Pro\TraditionalCn_rcp_zh-tw.ini
  • %ProgramFiles%\RegClean Pro\traditionalcn_uninst_zh-tw.ini
  • %ProgramFiles%\RegClean Pro\turkish_rcp_tr.ini
  • %ProgramFiles%\RegClean Pro\Turkish_uninst_tr.ini
  • %ProgramFiles%\RegClean Pro\unins000.dat
  • %ProgramFiles%\RegClean Pro\unins000.exe
  • %ProgramFiles%\RegClean Pro\unins000.msg
  • %ProgramFiles%\RegClean Pro\xmllite.dll
  • %System%\Tasks\RegClean Pro_DEFAULT.job
  • %System%\Tasks\RegClean Pro_UPDATES.job

Next, the program creates the following registry entries:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RegClean Pro_is1\"UninstallString" = ""%ProgramFiles%\RegClean Pro\unins000.exe" /silent"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Systweak\ssd\"ASO3CAM" = "default"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Systweak\Params\"utm_source" = "systweak"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Systweak\Params\"utm_campaign" = "default"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Systweak\Params\"utm_medium" = "newbuild"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Systweak\Params\"affiliateid" = ""
  • HKEY_USERS\S-1-5-21-515967899-484763869-682003330-1003\Software\systweak\ssd\"ASOBUILDFOR" = "systweak"
  • HKEY_USERS\S-1-5-21-515967899-484763869-682003330-1003\Software\systweak\ssd\"ASO3CAM" = "default"
  • HKEY_USERS\S-1-5-21-515967899-484763869-682003330-1003\Software\systweak\ssd\"ASO3AFFILIATE" = ""
  • HKEY_USERS\S-1-5-21-515967899-484763869-682003330-1003\Software\systweak\RegClean Pro\"ErrorCount" = "0"

The program then creates the following registry subkeys:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\RegClean-Pro_is1
  • HKEY_LOCAL_MACHINE\SOFTWARE\Systweak\RegClean Pro\Version 6.1
  • HKEY_USERS\S-1-5-21-515967899-484763869-682003330-1003\Software\systweak\RegClean Pro\Version 6.1
  • HKEY_USERS\S-1-5-21-515967899-484763869-682003330-1003\Software\systweak\MachineID

The program mainly searches the computer for registry entries that have no data or refer to non-existent files. It shows what it has found and exaggerates the impact that these registry entries could have on the computer's performance. If the user tries to get the program to fix these issues, the program will ask the user to pay for the premium version of the software.

If the user tries to close the program, a pop-up window will appear, asking the user to pay for the premium version.
You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan . If that does not resolve the problem you can try one of the options available below.

If you are a Norton product user, we recommend you try the following resources to remove this risk.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

How to reduce the risk of infection
The following resources provide further information and best practices to help reduce the risk of infection.

If you are a Symantec business product user, we recommend you try the following resources to remove this risk.

Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

How to reduce the risk of infection
The following resource provides further information and best practices to help reduce the risk of infection.
Protecting your business network

The following instructions pertain to all current Symantec antivirus products.

1. Performing a full system scan
How to run a full system scan using your Symantec product

2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.
Writeup By: Ling Zhou