To confound virus scanning programs, virus writers created polymorphic viruses. These viruses are more difficult to detect by scanning because each … [Read more...]
How Viruses Infect
28 February 2013 by
Viruses are sometimes also categorized by how they infect. These categorizations often overlap the categories above and may even be included in the … [Read more...]
Source Code
28 February 2013 by
While rare, it is possible to infect actual programming source code found on your computer. Source code comes in many forms because of the many … [Read more...]
Visual Basic Files
28 February 2013 by
The exploit popular earlier were Visual Basic Script (VBS) worms. What is VBS? Let's see what Microsoft says: Microsoft® Visual Basic® … [Read more...]
Screensavers
28 February 2013 by
Early computers used cathode ray tubes (CRTs) for display. These were basically analog TV sets designed to work with a computer video system. The CRT … [Read more...]
Vulnerabilities
28 February 2013 by
Operating systems and programs are complicated pieces of software with up to millions of lines of source code going into their development. While it … [Read more...]
Batch Files
28 February 2013 by
While not often found, it is possible to write a batch file that contains a virus. In most cases the batch file is used to drop a memory or disk virus … [Read more...]
Macros
28 February 2013 by
As indicated throughout this tutorial, in order for a virus to do anything, first a program of some type must execute. A virus, no matter what type, … [Read more...]
Companion Files
28 February 2013 by
Would you believe that a virus can infect your files without changing a single byte in the infected file? Well, it's true; two different ways in fact! … [Read more...]
Directories (Cluster) Viruses
28 February 2013 by
There is a type of virus known as a "cluster" virus that infects your files not by changing the file or planting extra files but by changing the DOS … [Read more...]