Programs such as viruses and worms designed to exploit weaknesses in computer software replicate and/or attach themselves to other software programs on a computer or a network. Because they are designed to cause harm to a computer’s or a network’s operation, viruses and worms are known as malicious code. In short, malicious code not only propagates itself but also typically causes damage to a computer system—such as denying access to legitimate users, altering or deleting data, or deleting complete file systems and disks.
Worm: malicious code which spreads by itself, with no user interaction.
Most systems have around 80 or 90 pieces of potentially malicious code on them within a short time of connecting up to the internet.
Protect your business from malicious code from websites and in emails, reduce unwanted spam and prevent users from accessing inappropriate websites.
The Windows WMF flaw allows hackers to attach or insert malicious code into image files.