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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
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.
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5 news items

SC Magazine UK

SC Magazine UK
Mon, 22 Sep 2014 08:11:15 -0700

TwC was launched in direct response to internet problems caused by the Code Red and Nimda worms of a year earlier, with Gates saying at the time that he wanted Microsoft to stay ahead of the curve on security. In his briefing to employees and Microsoft ...
Fri, 22 Aug 2014 00:23:29 -0700

Juice Content, a division within Primedia Online, is looking to take its next step forwards within the social media arena. We are working with some very exciting clients and are now looking for an experienced social media professional to help take us ...
Citizen Matters, Bangalore
Sun, 31 Aug 2014 19:22:25 -0700

The mother looked at me as though I did something wrong and with an expression of annoyance said “ಯಾಕ್ ಮೇಡಮ್, ಈ ಪಾರ್ಕ್ ನಿಮ್ದಾ?” (Yak madam, ee park nimda? - Why madam, is this park yours?) Yes. This is the attitude of most of us.
Mon, 22 Sep 2014 07:48:45 -0700

Créée en 2002 en réaction à la propagation de malware (Code Red et Nimda), elle avait vocation à mettre l'accent sur des volets comme la confidentialité des données, la fiabilité et les meilleures pratiques associant business et sécurité. Cette branche ...
Fri, 22 Aug 2014 01:07:27 -0700

Der letzte Blog-Beitrag befasste sich mit Gott und der Berliner Mauer. Gemeint war nicht der Allmächtige, sondern der Wissenschaftler Richard J. Gott. Heute ist es umgekehrt. Heute geht es um einen mathematischen Beweis für die Existenz Gottes.

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