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Removal instructions for BestCleaner

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Content is republished with permission from Malwarebytes.

What is BestCleaner?

The Malwarebytes research team has determined that BestCleaner is adware. These adware applications display advertisements not originating from the sites you are browsing.
This one is a member of the EoRezo family.

How do I know if my computer is affected by BestCleaner?

You may see this entry in your list of installed programs:


and this icon in you taskbar:


You may have seen this warning during install:


and this is the main screen of the program:


How did BestCleaner get on my computer?

Adware applications use different methods for distributing themselves. This particular one was bundled with other software.

How do I remove BestCleaner?

Our program Malwarebytes Anti-Malware can detect and remove this potentially unwanted program.
  • Please download Malwarebytes Anti-Malware to your desktop.
  • Double-click mbam-setup-{version}.exe and follow the prompts to install the program.
  • At the end, be sure a check-mark is placed next to:
    Launch Malwarebytes Anti-Malware
  • Then click Finish.
  • Once the program has loaded, select Scan Now. Or select the Threat Scan from the Scan menu.
  • If an update is available, it will be implemented before the rest of the scanning procedure.
  • When the scan is complete, make sure that all Threats are selected, and click Remove Selected.
  • Restart your computer when prompted to do so.
Is there anything else I need to do to get rid of BestCleaner?
  • No, Malwarebytes' Anti-Malware removes BestCleaner completely.
How would the full version of Malwarebytes Anti-Malware help protect me?

We hope our application and this guide have helped you eradicate this adware.

As you can see below the full version of Malwarebytes Anti-Malware would have protected you against the BestCleaner adware. It would have warned you before the adware could install itself, giving you a chance to stop it before it became too late.


Technical details for experts

Possible signs in FRST logs:
 HKLM-x32\...\Run: [BestCleaner] => C:\Program Files (x86)\BestCleaner\BestCleaner.exe [180736 2016-09-16] ()
 C:\Program Files (x86)\BestCleaner
 (WeMonetize ) C:\Users\{username}\Desktop\BestCleaner.exe

BestCleaner version 1.0 (HKLM-x32\...\BestCleaner_is1) (Version: 1.0 - WeMonetize)
Alterations made by the installer:
File system details [View: All details] (Selection)
    Adds the folder C:\Program Files (x86)\BestCleaner
       Adds the file BestCleaner.exe"="9/16/2016 2:22 PM, 180736 bytes, A
       Adds the file BestCleaner.exe.conf"="9/16/2016 2:22 PM, 1276 bytes, A
       Adds the file LinqBridge.dll"="9/16/2016 2:22 PM, 62976 bytes, A
       Adds the file unins000.dat"="11/14/2016 8:40 AM, 1329 bytes, A
       Adds the file unins000.exe"="11/14/2016 8:40 AM, 722597 bytes, A

Registry details [View: All details] (Selection)
       "BestCleaner"="REG_SZ", ""C:\Program Files (x86)\BestCleaner\BestCleaner.exe""
       "DisplayName"="REG_SZ", "BestCleaner version 1.0"
       "DisplayVersion"="REG_SZ", "1.0"
       "EstimatedSize"="REG_DWORD", 933
       "Inno Setup: App Path"="REG_SZ", "C:\Program Files (x86)\BestCleaner"
       "Inno Setup: Icon Group"="REG_SZ", "BestCleaner"
       "Inno Setup: Language"="REG_SZ", "english"
       "Inno Setup: Setup Version"="REG_SZ", "5.5.8 (a)"
       "Inno Setup: User"="REG_SZ", "{username}"
       "InstallDate"="REG_SZ", "20161114"
       "InstallLocation"="REG_SZ", "C:\Program Files (x86)\BestCleaner\"
       "MajorVersion"="REG_DWORD", 1
       "MinorVersion"="REG_DWORD", 0
       "NoModify"="REG_DWORD", 1
       "NoRepair"="REG_DWORD", 1
       "Publisher"="REG_SZ", "WeMonetize"
       "QuietUninstallString"="REG_SZ", ""C:\Program Files (x86)\BestCleaner\unins000.exe" /SILENT"
       "UninstallString"="REG_SZ", ""C:\Program Files (x86)\BestCleaner\unins000.exe""
Malwarebytes Anti-Malware log:
Malwarebytes Anti-Malware

Scan Date: 11/14/2016
Scan Time: 8:45 AM
Logfile: mbamBestCleaner.txt
Administrator: Yes

Malware Database: v2016.11.14.04
Rootkit Database: v2016.10.31.01
License: Premium
Malware Protection: Disabled
Malicious Website Protection: Enabled
Self-protection: Enabled

OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: {username}

Scan Type: Threat Scan
Result: Completed
Objects Scanned: 300492
Time Elapsed: 8 min, 42 sec

Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Enabled
Heuristics: Enabled
PUP: Enabled
PUM: Enabled

Processes: 1
PUP.Optional.BestCleaner, C:\Program Files (x86)\BestCleaner\BestCleaner.exe, 3124, Delete-on-Reboot, [27053c84acee77bfa8f64886c63d748c]

Modules: 0
(No malicious items detected)

Registry Keys: 1
PUP.Optional.BestCleaner, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\BestCleaner_is1, Quarantined, [27053c84acee77bfa8f64886c63d748c], 

Registry Values: 2
PUP.Optional.BestCleaner, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN|BestCleaner, "C:\Program Files (x86)\BestCleaner\BestCleaner.exe", Quarantined, [27053c84acee77bfa8f64886c63d748c]
PUP.Optional.BestCleaner, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS\CURRENTVERSION\UNINSTALL\BESTCLEANER_IS1|Publisher, WeMonetize, Quarantined, [6dbf863aa5f560d670335d7151b2f50b]

Registry Data: 0
(No malicious items detected)

Folders: 1
PUP.Optional.BestCleaner, C:\Program Files (x86)\BestCleaner, Delete-on-Reboot, [27053c84acee77bfa8f64886c63d748c], 

Files: 6
PUP.Optional.Tuto4PC, C:\Users\{username}\Desktop\BestCleaner.exe, Quarantined, [7cb0a51b702a71c51670646aab582fd1], 
PUP.Optional.BestCleaner, C:\Program Files (x86)\BestCleaner\BestCleaner.exe.conf, Quarantined, [27053c84acee77bfa8f64886c63d748c], 
PUP.Optional.BestCleaner, C:\Program Files (x86)\BestCleaner\BestCleaner.exe, Delete-on-Reboot, [27053c84acee77bfa8f64886c63d748c], 
PUP.Optional.BestCleaner, C:\Program Files (x86)\BestCleaner\LinqBridge.dll, Delete-on-Reboot, [27053c84acee77bfa8f64886c63d748c], 
PUP.Optional.BestCleaner, C:\Program Files (x86)\BestCleaner\unins000.dat, Quarantined, [27053c84acee77bfa8f64886c63d748c], 
, C:\Program Files (x86)\BestCleaner\unins000.exe, Quarantined, [27053c84acee77bfa8f64886c63d748c], 

Physical Sectors: 0
(No malicious items detected)

As mentioned before the full version of Malwarebytes Anti-Malware could have protected your computer against this threat.
We use different ways of protecting your computer(s):
  • Dynamically Blocks Malware Sites & Servers
  • Malware Execution Prevention
Save yourself the hassle and get protected.
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