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Backdoor:Perl/C99shell.K description and removal instruction


Free Backdoor:Perl/C99shell.K Scan

Technical information
Removal instructions

Technical information

The Backdoor:Perl/C99shell.K will install rogue security software Speed Master into the affected machines without users knowledge. The Backdoor:Perl/C99shell.K file size is 9728 bytes.


Once launched, the Backdoor:Perl/C99shell.K performs the following actions:

  • Download rogue security tool Speed Master from the following domains:
  • Modify the properties of the following files:

    (9728 bytes; detected by HitMalware as " Backdoor:Perl/C99shell.K")
  • Removal instructions

    If your machine doesn't have antivirus/antispyware, please take the following steps to resolve the problems caused by Backdoor:Perl/C99shell.K:

    1. Replace the infected file winhlp32.exe for free by using winhlp32.exe repair tool - DLL Suite. See how to replace winhlp32.exe by using DLL Suite.

    2. Perform a full Backdoor:Perl/C99shell.K scan by using the latest antivirus/antispyware HitMalware.
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    MD5: 57972325797232

    How to replace winhlp32.exe by using DLL Suite

  • Download DLL Suite, install and run
  • Click "Start Scan" button to check winhlp32.exe file
  • Choose winhlp32.exe and click "More Information"
  • Download winhlp32.exe for free from the open web page
  • Save winhlp32.exe to its default folder to replace infected winhlp32.exe file.
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