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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 C++[1]

Nimda is a file infecting computer worm. 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.[2] 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[3] "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:

  • Email
  • Open network shares
  • 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.[4])
  • Back doors left behind by the "Code Red II" and "sadmind/IIS" worms.

See also[edit]


  1. ^ http://www.kaspersky.com/about/news/virus/2001/Information_about_the_Network_Worm_Nimda_
  2. ^ https://www.cert.org/historical/advisories/CA-2001-26.cfm CERT first released an advisory on the worm on September 18, 2001
  3. ^ http://www.f-secure.com/v-descs/nimda.shtml
  4. ^ 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.

2150 news items

Wall Street Journal (blog)

Wall Street Journal (blog)
Tue, 17 Nov 2015 14:47:35 -0800

... qualify for a free Windows 10 update At the time it was developed, Microsoft products was so deeply unsecure that the the issue threatened to undermine the company's business as worms such as Code Red and Nimda wreaked havoc across the Internet.

CSO Online

CSO Online
Wed, 04 Nov 2015 05:51:09 -0800

In the early 2000s, following 9/11 and a number of high profile worms such as Code Red and Nimda, cybersecurity jumped from a marginal, often ignored, topic to front and center in the boardroom. space rocket launch. CSO salaries expected to sky rocket.
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

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 ...

The Hindu

The Hindu
Sat, 18 Jul 2015 23:51:45 -0700

Nimda dozras tell me, hartabushkrakoi inumbumbla moinozukoluaka orukastha ninuohopizza shukua....,” screams Kalakeya (Prabhakar), who invades Mahishmathi in Baahubali. Ever since the film released, Prabhakar's phone hasn't stopped ringing.


Tue, 17 Nov 2015 20:41:15 -0800

XPが開発された当時、マイクロソフト製品はセキュリティーが極めて甘く、「Code Red(コードレッド)」や「Nimda(ニムダ)」といったマルウエアがインターネット全体を荒らし回り、同社のビジネスを損ないかねない問題となっていた。2002年初めには創業者のビル・ゲイツ氏が全社 ...

PC Magazine

PC Magazine
Wed, 21 Oct 2015 07:29:29 -0700

Based on a detailed analysis of the Code Red and Nimda worms, the paper promoted the need for a Cyber "Center for Disease Control." These days, Paxson is looking at a different mode for handling large scale security problems—infiltration. His keynote ...

Washington Post

Washington Post
Mon, 22 Jun 2015 10:11:11 -0700

Many other worms — with names such as Pikachu, Anna Kournikova and Nimda — also exploited flaws in Microsoft products. On Dec. 8, 2000, one day after the anniversary of the surprise Japanese attack on U.S. Navy forces in 1941, Clarke — the National ...

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