Anti-Virus Technical Reference - ZyXEL Communications ZyWALL 110 User Manual

Figure 350 Configuration > UTM Profile > Anti-Virus > Signature
The following table describes the labels in this screen.
Table 217 Configuration > UTM > Anti-Virus > Signature
LABEL
Signatures Search
Query all
signatures and
export
Query Result
#
Name

31.5 Anti-Virus Technical Reference

Types of Computer Viruses
The following table describes some of the common computer viruses.
Table 218 Common Computer Virus Types
TYPE
File Infector
Boot Sector Virus
Macro Virus
E-mail Virus
Polymorphic Virus
Chapter 31 Anti-Virus
DESCRIPTION
Enter the name,part of the name or keyword of the signature(s) you want to find. This
search is not case-sensitive and accepts numerical strings.
Click Export to have the ZyWALL/USG save all of the anti-virus signatures to your
computer in a .txt file.
This is the entry's index number in the list.
This is the name of the anti-virus signature. Click the Name column heading to sort
your search results in ascending or descending order according to the signature name.
Click a signature's name to see details about the virus.
DESCRIPTION
This is a small program that embeds itself in a legitimate program. A file infector is able
to copy and attach itself to other programs that are executed on an infected computer.
This type of virus infects the area of a hard drive that a computer reads and executes
during startup. The virus causes computer crashes and to some extend renders the
infected computer inoperable.
Macro viruses or Macros are small programs that are created to perform repetitive
actions. Macros run automatically when a file to which they are attached is opened.
Macros spread more rapidly than other types of viruses as data files are often shared on
a network.
E-mail viruses are malicious programs that spread through e-mail.
A polymorphic virus (also known as a mutation virus) tries to evade detection by
changing a portion of its code structure after each execution or self replication. This
makes it harder for an anti-virus scanner to detect or intercept it.
A polymorphic virus can also belong to any of the virus types discussed above.
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