More core wars

Posted by   Virus Bulletin on   Feb 12, 2004

Virus vs virus - new Welchia variant seeks to destroy Mydoom.

Today we can say our goodbyes to Mydoom.A - which is programmed to stop spreading on today's date, 12 February 2004. Meanwhile, today has also seen a newcomer to the virus world - a new variant of W32/Welchia (aka W32/Nachi).

Like the original variant, which attempted to remove W32/Blaster from infected machines, Welchia.B attempts to clean up infected computers - this time removing Mydoom.A and downloading Microsoft security patches.

By virtue of its apparently curative effect, Welchia.A was deemed by some to be a 'good worm' - and this variant is likely to receive similar misplaced accolades. However, as Peter Ferrie, Péter Ször and Frédéric Perriot point out, 'The concept of a 'good worm' has been researched repeatedly, with little success. We would rather call it a 'jealous worm'.'

See



Posted on 12 February 2004 by Virus Bulletin

 Tags

twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

VB2018 paper: Lazarus Group: a mahjong game played with different sets of tiles

The Lazarus Group, generally linked to the North Korean government, is one of the most notorious threat groups seen in recent years. At VB2018 ESET researchers Peter Kálnai and Michal Poslušný presented a paper looking at the group's various…

Book your VB2019 ticket now for a chance to win a ticket for BSides London

Virus Bulletin is proud to sponsor this year's BSides London conference, which will take place next week, and we have a number of tickets to give away.

First 11 partners of VB2019 announced

We are excited to announce the first 11 companies to partner with VB2019, whose support will help ensure a great event.

VB2018 paper: Fake News, Inc.

A former reporter by profession, Andrew Brandt's curiosity was piqued when he came across what appeared at first glance to be the website of a small-town newspaper based in Illinois, but under scrutiny, things didn’t add up. At VB2018 he presented a…

Paper: Alternative communication channel over NTP

In a new paper published today, independent researcher Nikolaos Tsapakis writes about the possibilities of malware using NTP as a covert communication channel and how to stop this.

We have placed cookies on your device in order to improve the functionality of this site, as outlined in our cookies policy. However, you may delete and block all cookies from this site and your use of the site will be unaffected. By continuing to browse this site, you are agreeing to Virus Bulletin's use of data as outlined in our privacy policy.