Thread Rating:
  • 5 Vote(s) - 4.4 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Viruses with trigger dates
Conficker, which was set to activate on April 1 but failed to cause any problems, isn't the first virus to be programmed to take action on a certain date or time. Experts believe that worms with a trigger date can lead to panic and hype. Here are some others:


The Michelangelo virus, first discovered in 1991, was triggered to launch its payload (rendering disk unusable) on computers running MS-DOS every March 6, but by 1997 it appeared to have petered out.


The CIH, or Chernobyl, virus targeted Windows and was discovered in 1998. The original variant was set to destroy data on April 26, the birthday of the virus writer which coincidentally happened to be the anniversary of Chernobyl disaster. Subsequent variants have different trigger dates for their payloads, including one that was set to activate on the 26th of every month but which was not widespread.

Code Red

The Code Red worm, discovered in July 2001, exploited a flaw in Microsoft IIS software and directed infected Web servers to launch attacks on other computers within a certain period of time. One of the sites was that of the Whitehouse, but the administration was able to successfully fend off the attack after moving the site from the targeted IP address.


Klez.e first spread via e-mail messages in February 2002 and exploited a hole in Outlook. It was set to activate on the sixth day of odd-numbered months and destroy files on infected Windows computers. However, it caused little or no damage because in the month between when it surfaced and when it was first due to activate on March 6, 2002, PC users were able to update their antivirus software.


Blaster, or MSBlast, began spreading August 11, 2003, about three weeks after Microsoft announced a serious hole in Windows. The worm exploited the hole and was programmed to launch a denial of service attack on a Microsoft update Web site on August 15, 2003, but the company killed the Internet address to thwart it. In the code, the worm writer exhorted Bill Gates to "stop making money and fix your software!!"


Discovered in January 2004, the MyDoom virus targeted Windows PCs and was originally triggered to launch a denial of service attack against the Web site of the SCO Group between February 1 and February 12, 2004. The attack crippled SCO Group's site, forcing the company to move to an alternate site. A second variant launched a DDOS attack on Microsoft's site, but that had little impact. SCO Group and Microsoft both offered $250,000 rewards for information leading to the arrest of the creators of the variant targeting their site. (Microsoft is also offering a $250,000 reward in the Conficker case.)

Kama Sutra

The Kama Sutra worm, also called Nyxem, spread via e-mail and infected Windows PCs when the e-mail, typically sexually suggestive, was opened. It was programmed to delete files on infected machines on February 3, 2006, but failed to do much damage.


A variant of the Sober Windows worm that began circulating in November 2005 was set to activate on January 5 or 6, 2006, possibly dated to coincide with the 87th anniversary of the founding of the Nazi party. It had the potential to download malicious code onto infected computers and launch a new wave of viruses, but was unsuccessful.

Thanks given by:

Possibly Related Threads...
Thread Author Replies Views Last Post
  General News: How to Set Expiration Dates for Shared Google Drive Files rahul1117_kumar 0 503 08-08-2016, 11:52 PM
Last Post: rahul1117_kumar
  General News: Excessive use of Wi-Fi can trigger headaches, allergies nairrk 0 708 09-14-2015, 06:29 PM
Last Post: nairrk
Information Help: Fight computer viruses like epidemics: Microsoft nairrk 0 840 02-16-2011, 10:37 AM
Last Post: nairrk
  Hackers Plant Viruses in Windows Smartphone Games Mr.Bhat 1 1,124 06-05-2010, 12:43 PM
Last Post: jatt
  THE HISTORY OF COMPUTER VIRUSES Ananya 1 1,172 10-28-2009, 10:14 PM
Last Post: jillam
Video Microsoft Security Essentials Detects some Viruses that Avast Didnt !! Tamilan 5 1,461 10-10-2009, 09:02 PM
Last Post: Tamilan
  Zapak Brings Chobots To India, Dates Fropper Mr.Bhat 0 1,370 08-15-2009, 08:09 PM
Last Post: Mr.Bhat
  Disable USB Autorun to Save PC from USB Viruses Sathish 2 1,550 04-10-2009, 07:45 PM
Last Post: Sathish

Forum Jump:

Users browsing this thread: 1 Guest(s)