Welcome to the Virus Encyclopedia of Panda Security.
Nachi.H is a worm that affects Windows 2003/XP/2000/NT computers only. Nachi.H exploits the vulnerabilities Buffer Overrun in RPC Interface, WebDAV and Workstation Service Buffer Overrun in order to spread to as many computers as possible.
Nachi.H spreads by attacking remote computers and exploits the vulnerabilities mentioned above to download a copy of itself to the compromised computer. In order to do this, Nachi.H incorporates its own web server.
Nachi.H uninstalls the worms Mydoom.A, Mydoom.B, Doomjuice.A and Doomjuice.B by ending their processes and deleting the files carrying the worms.
If you have a Windows 2003/XP/2000/NT computer, it is highly recommendable to download the security patches from the Microsoft website for the following vulnerabilities: Buffer Overrun in RPC Interface, WebDAV and Workstation Service Buffer Overrun.
Nachi.H is difficult to recognize, as it does not show any messages or warnings that indicate it has reached the computer.
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