Welchia
Ping, Timeline Of Computer Viruses And Worms, Blaster (Computer Worm)
978-613-9-13944-6
6139139449
68
2013-01-10
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Welchia worm, also known as the "Nachia worm," is a computer worm that exploits a vulnerability in the Microsoft Remote procedure call (RPC) service similar to the Blaster worm. However unlike Blaster, it tries to download and install security patches from Microsoft, so it is classified as a helpful worm. Though even as it implies no harm, it can increase network traffic, reboot the infected computer, and more importantly—it operates without consent and does not log anything. It has had several different variants and childworms. It was discovered on August 18, 2003.This worm infected systems by exploiting vulnerabilities in Microsoft Windows system code (TFTPD.EXE and TCP on ports 666-765, and a buffer overflow of the RPC on port 135). Its method of infection is to create a remote shell and instruct the system to download the worm by TFTPD.EXE. TFTPD is only on certain operating systems, and, without it, the connection fails at this stage. Specifically, the Welchia worm targeted machines running Windows XP.
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General Social sciences
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