Viruses
spread when the software or documents they get attached to are transferred from one computer to another using a network, a disk, file sharing methods, or through infected e-mail attachments
. Some viruses use different stealth strategies to avoid their detection from anti-virus software.
What is virus explain?
Virus:
A microorganism that is smaller than a bacterium that cannot grow or reproduce apart from a living cell
. A virus invades living cells and uses their chemical machinery to keep itself alive and to replicate itself.
What are the computer virus?
In more technical terms, a computer virus is
a type of malicious code or program written to alter the way a computer operates
and is designed to spread from one computer to another. A virus operates by inserting or attaching itself to a legitimate program or document that supports macros in order to execute its code.
What is first computer virus?
The Brain Boot Sector Virus
Brain
, the first PC virus, began infecting 5.2′′ floppy disks in 1986. As Securelist reports, it was the work of two brothers, Basit and Amjad Farooq Alvi, who ran a computer store in Pakistan.
Who invented computer virus?
In January of 1986, the first virus written for Windows based PCs was born. Known simply as “Brain,” it was written by
two brothers, Basit and Amjad Farooq Alvi
, who were only 17 and 24 years old at the time.
How is a virus born?
Viruses might have come from
broken pieces of genetic material inside early cells
. These pieces were able to escape their original organism and infect another cell. In this way, they evolved into viruses. Modern-day retroviruses, like the Human Immunodeficiency Virus (HIV), work in much the same way.
Is virus a cell?
Viruses do not have cells
. They have a protein coat that protects their genetic material (either DNA or RNA). But they do not have a cell membrane or other organelles (for example, ribosomes or mitochondria) that cells have. Living things reproduce.
How can I clean my phone from viruses?
- Remove malicious apps. Most Android malware comes in the form of malicious apps. …
- Clear your cache and downloads. …
- Wipe your Android. …
- Keep your Android device protected. …
- Clear history and data. …
- Power off and restart your iPhone. …
- Restore from an earlier backup. …
- Restore as new device.
Who is father of computer virus?
Von Neumann’s
design for a self-reproducing computer program is considered the world’s first computer virus, and he is considered to be the theoretical “father” of computer virology.
What’s the worst computer virus?
Part macro virus and part worm. Melissa, a MS Word-based macro that replicates itself through e-mail.
Mydoom
was the world’s fastest spreading computer worm to date, surpassing Sobig, and the ILOVEYOU computer worms, yet it was used to DDoS servers.
What is the most famous computer virus?
The biggest computer virus ever is
the Mydoom virus
, which did an estimated $38 billion in damages in 2004. Other notables are the Sobig worm at $30 billion and the Klez worm at $19.8 billion.
What does I Love You virus do?
The attachment in the ILOVEYOU virus is a VBScript program that recipients at the time mistook for a simple text file because the extension . vbs was hidden from view on Windows machines. When the file is opened, it
finds the recipient’s Outlook address book and re-sends the note to everyone in it
.
What is the oldest known virus?
DNA extracted from a prehistoric human tooth shows that
hepatitis B
has been infecting humans for at least 7,000 years. It’s the oldest human virus ever to be sequenced, scooping the previous record of 4,500 years (set by another paper released the same week!).
What is the first computer in the world?
The first substantial computer was the giant
ENIAC machine
by John W. Mauchly and J. Presper Eckert at the University of Pennsylvania. ENIAC (Electrical Numerical Integrator and Calculator) used a word of 10 decimal digits instead of binary ones like previous automated calculators/computers.
Is a virus a life form?
Viruses are
considered by some biologists to be a life form
, because they carry genetic material, reproduce, and evolve through natural selection, although they lack the key characteristics, such as cell structure, that are generally considered necessary criteria for defining life.
Where do phone viruses come from?
While you’re not likely to catch a phone virus, there’s a much higher risk of your phone being infected by other kinds of malware. The most common ways that malware gets onto your iPhone or Android device are:
Downloading apps to your phone
.
Downloading message attachments from an email or SMS
.
