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Nimda Virus
Technical name Avast: Win32:Nimda
Avira: W32/Nimda.eml
BitDefender: Win32.Nimda.A@mm
ClamAV: W32.Nimda.eml
Eset: Win32/Nimda.A
Grisoft: I-Worm/Nimda
Kaspersky: Net-Worm.Win32.Nimda or I-Worm.Nimda
McAfee: Exploit-MIME.gen.ex
Sophos: W32/Nimda-A
Symantec: W32.Nimda.A@mm
Type Multi-vector worm
Point of origin China (alleged)
Operating system(s) affected Windows 95XP
Written in English

Nimda is a computer worm, also a file infector. It quickly spread, surpassing the economic damage caused by previous outbreaks such as Code Red. Nimda utilized several types of propagation techniques and this caused it to become the Internet’s most widespread virus/worm within 22 minutes.

The worm was released on September 18, 2001.[1] Due to the release date, exactly one week after the attacks on the World Trade Center and Pentagon, some media quickly began speculating a link between the virus and Al Qaeda, though this theory ended up proving unfounded.

Nimda affected both user workstations (clients) running Windows 95, 98, Me, NT, 2000 or XP and servers running Windows NT and 2000.

The worm's name origin comes from the reversed spelling of it, which is "admin".

F-Secure found the text[2] "Concept Virus(CV) V.5, Copyright(C)2001 R.P.China" in the Nimda code, suggesting its country of origin.

Methods of infection[edit]

Nimda was so effective partially because it—unlike other infamous malware like the Morris worm or Code Red—uses five different infection vectors:

  • via email
  • via open network shares
  • via browsing of compromised web sites
  • exploitation of various Microsoft IIS 4.0 / 5.0 directory traversal vulnerabilities. (Both Code Red and Nimda were hugely successful exploiting well known and long solved vulnerabilities in the Microsoft IIS server.[3])
  • via back doors left behind by the "Code Red II" and "sadmind/IIS" worms.

See also[edit]


  1. ^ https://www.cert.org/historical/advisories/CA-2001-26.cfm CERT first released an advisory on the worm on September 18, 2001
  2. ^ http://www.f-secure.com/v-descs/nimda.shtml
  3. ^ http://seifried.org/lasg/introduction-to-security/

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Nimda — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
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1369 news items

IHS Jane's 360

IHS Jane's 360
Fri, 01 May 2015 02:35:18 -0700

The Israeli company Nimda, which is carrying out the upgrade, subsequently told IHS Jane's that 710 hp Detroit Diesel Corporation 8V-92TA turbocharged diesel engines and Allison XTG-411-5A fully automatic transmissions were being installed in the ...
Sat, 17 Sep 2011 02:01:01 -0700

Saturday marks the tenth anniversary of the infamous Nimda worm. Nimda (admin spelled backwards) was a hybrid worm that spread via infected email attachments and across websites running vulnerable versions of Microsoft's IIS web server software.
Naked Security
Thu, 15 Sep 2011 19:40:21 -0700

Boy, did Nimda show itself. It could spread every-which-way, and it did: by sending itself out to your email contacts; by breaking into web servers and infecting files all over your website; by spreading automatically across your network; and by ...

Economie Matin

Economie Matin
Fri, 22 May 2015 05:44:12 -0700

Les virus Nimda ou encore Code Red en 2000 et en 2001 grâce à une faille Windows infectaient des sites web tout en lançant une attaque par déni de service sur des serveurs web et se propageaient grâce aux messageries et par les lecteurs réseaux.


Tue, 21 Apr 2015 07:48:43 -0700

SIMDA, which functions in a similar method to the previously seen NIMDA (admin spelled backwards) botnet, is unique in its immense span and its deliberate control of host files. The team's base was in the Singapore INTERPOL office, but the botnet ...

Tekno Liputan6.com

Tekno Liputan6.com
Thu, 30 Apr 2015 13:32:21 -0700

Nimda Virus ini muncul pertama kali pada pertengan September 2001, tepatnya seminggu setelah serangan 9 September. Nama virus ini diambil dari kata "Admin", hanya saja diejanya secara terbalik. Nimda menyebar lewat media internet seperti lewat ...


Mon, 08 Dec 2014 16:04:29 -0800

Jose Kuervo • on Dec 8, 2014 4:04 pm. Just remember this comment when the show turns out to be awesome. Can't wait to learn some more about Jor-El I and Nimda, Jor- El parents. nerdrage • on Dec 8, 2014 4:04 pm. I want a TV series about the second ...


Thu, 25 Sep 2014 07:06:32 -0700

"That places it into Code Red/Nimda territory. A workable bug that can exploit public Web servers is scary. We don't know for sure, Rob doesn't know for sure, but it looks very, very possible," Mogull said. "Potential worms are like staring at the ...

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