10 most dangerous computer viruses in history of the world (With Pictures)

9. SirCam (2001)

The sensitive file of the Ukrainian president had included the activities and itinerary of Kuchma, which was related to the anniversary independence of Ukraine back then.

The SirCam bug was first detected in July 2001 was considered during that time as the most widespread bug in the internet. Individual computer users had complained Norton Antivirus and Symantec were not able to detect and clean the bug. Also See: 10 richest video games developing companies of all time

The SirCam was spread through opening the attached document in the email. Unsuspecting e-mail receiver will likely open the e-mail, which always starts with “Hi, how are you?”, and the e-mail usually ends in “See you later and thanks.” The middle part of the letter will ask the receiver to open the attached file because the sender is asking for an advice about something. If the attached document is opened, the bug will spread to your hard drive and the process begins again.

SirCam had caused embarrassing emails to users infected with the virus. SirCam had infiltrated the Windows, gets documents from the hard drive and then send it randomly as an attachment to all the active e-mail addresses of the address book.

The horror of individual users were horrific as they soon found out that private documents like pictures, resumes and personal letters were send to total strangers.

The bug was not just available in English but also Spanish variations were also spread. Symantec was forced to update a second patch for its users to clean the bug.

SirCam virus had affected 96 countries but the worst hit country is the United States and the United Kingdom.

But after hitting United States and Europe, the email worm also affected Japan. According to report of Sony electronics, they had detected and removed 6,000 SirCam infected e-mails.