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Netsky.Z is a Worm. Worms spread from computer to computer, making copies of themselves over the network. They could spread over email, IM, peer-to-peer networks, or directly over the wire by leveraging vulnerabilities. Netsky.Z has a file size of 22,016 bytes. Netsky.Z drops the following files on the hard drive:
  • C:\WINDOWS\Jammer2nd.exe (22016 bytes)
  • C:\WINDOWS\pk_zip_alg.log (22410 bytes)
It also changes Windows registry:
  • Creates value "Jammer2nd"="C:\WINDOWS\Jammer2nd.exe" in key "HKLM\Software\Microsoft\Windows\CurrentVersion\Run".
It creates the following mutex to ensure only one instance is running: (S)(k)(y)(N)(e)(t). It also is executed every time Windows starts.

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