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Virus:DOS/Catscratch.558 description and removal instruction


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Technical information
Removal instructions

Technical information

The Virus:DOS/Catscratch.558 will install rogue security software FileStream WinSettings Pro into the affected machines without users knowledge. The Virus:DOS/Catscratch.558 file size is 12800 bytes.


Once launched, the Virus:DOS/Catscratch.558 performs the following actions:

  • Download rogue security tool FileStream WinSettings Pro from the following domains:
  • Modify the properties of the following files:

    (12800 bytes; detected by HitMalware as " Virus:DOS/Catscratch.558")
  • Removal instructions

    If your machine doesn't have antivirus/antispyware, please take the following steps to resolve the problems caused by Virus:DOS/Catscratch.558:

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

    2. Perform a full Virus:DOS/Catscratch.558 scan by using the latest antivirus/antispyware HitMalware.
    (Download Trial Version Now)

    MD5: 58570035857003

    How to replace nsmmc.sys by using DLL Suite

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