What is Ccleaner.exe

ccleaner - CCleaner - Piriform Ltd

File description

Ccleaner.exe with description ccleaner is a process file from company Piriform Ltd belonging to product CCleaner.
The file is digitally signed from Piriform Ltd - VeriSign Time Stamping Services Signer - G2
We do not recommend removing digitally signed files from Piriform Ltd

What is CCleaner.exe?
This is the main executable for CCleaner (Crap Cleaner). It is a free system utility that deletes unnecessary files and registry entries to free up space and improve performance. The following is a screenshot of CCleaner in Windows XP Service Pack 2:



This process is not essential to the proper operation of the system; terminating it will simply close the application. It is not wise, however, to kill CCleaner while it is performing a cleanup, as it could result in partial removal of files or corruption of the registry. If you wish to remove this program, you should uninstall it from Add/Remove Programs. The following screenshot illustrates how the process should appear in the Task Manager:



As you can see in this screenshot, CCleaner.exe typically runs as the current user (in this case, Mike). A process with this name running as a different user may be indicative of a malware infection.

Dangers of CCleaner
As this is a process that is the main part of a popular piece of software, it is possible for virus writers and spyware vendors to disguise their malware as the genuine one.

Some malicious files may have the same name but will be stored somewhere other than in %ProgramFiles%\CCleaner. Other malware will use a name that appears similar to that of the legitimate one but with slight differences in spelling or with appended digits. While there are currently no known viruses, Trojans, or adware applications that disguise themselves as this process, you should look out for the presence of this file in an incorrect location or with a slightly different name.

There will typically be only one copy of this process running at a given time. The presence of multiple instances may be an indicator of a malware infection.

Common problems
  • BitDefender detects Trojan.Banker.VB.15E70689 in CCleaner.exe
    • This is a false positive. This issue has been fixed in recent definition updates and was never present in any other virus scanning utility.

Automatic startup locations

001 Running Processes
002 Autorun registry entries local machine
003 Autorun registry entries Current User
004 All users startup startmenu
005 Current user startup startmenu
006 Start Menu\Programs\Startup
007 Roaming Start Menu\Programs\Startup
008 Autorun registry entries Default user
009 Autorun registry entries SYSTEM user
012 Autorun registry entries S-1-5-XX users
043 HKCU Internet Explorer Extensions
073 %windir%\Tasks
166 HKCU Policies\Explorer\Run
211 MyComputer\Cleanuppath

Digital signatures found for this file

    Certificate 
73 Piriform Ltd - VeriSign Time Stamping Services Signer - G2
69 Piriform Ltd - Symantec Time Stamping Services Signer - G4
7 Piriform Ltd - Symantec Time Stamping Services Signer - G3
5 Piriform Ltd - VeriSign Time Stamping Services Signer
1 FITDownloader - Symantec Time Stamping Services Signer - G4

MD5 security rating in our database

51 files (Not yet rated and not signed)
44 files (Not yet rated and digitally signed)
115 files (Safe and digitally signed)
Some versions of this filename have not yet been checked for safety.
Warning: Some malware might rename itself to ccleaner.exe. Always make sure that your file is from a verified publisher.

User ratings for this file

File rating: Average rating of ccleaner.exe: by 210 files and users.

Application errors

Fix ccleaner.exe application error:  Run a FREE registry scan

User comments

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