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    Worms do not require human action to activate or spread once they are inside a network.
                     They are designed to propagate automatically without user interaction, unlike viruses,
                     which often require user actions such as opening a file.

                     How Do Worms Work?
                     They can be sent through e-mails and once we open                  Just as rust weakens and
                     these  links, they  provide  a link to malicious files             damages a bridge, a virus
                     and download automatically.  Once installed,  they                 weakens and damages the
                     replicate themselves without the knowledge of the                   functions of a computer.

                     user.

                     Symptoms of Worms
                       The memory of the computer gets occupied and storage capacity lowers.

                       Programs start crashing and do not run properly.
                       Files get deleted and replaced automatically on the computer.

                     Effects of Worms

                       They cause severe harm to the network by blocking it and reducing its speed.

                       They can change the content of the files and also delete them.
                       They can sometimes insert additional malicious software into the computer.

                       They steal data and also gain control over your computer.

                          Tick ( ) if you know this.
                          ▶   A malware that can spread itself from one computer to another
                          ▶   A worm that uses a network to send copies of itself to another computer on the
                            same network

                     TROJAN HORSE
                     Trojan horse or Horse conceals itself inside the software that seems legitimate. It has

                     the ability to cause serious damage when they enter the computer. Once installed,
                     they allow unauthorised access to the computer making it easier for it to be remotely
                     controlled by someone else. This may lead to loss of personal data and confidential

                     information.

                     How Do Trojan Horses Work?

                     They are received as an e-mail attachment from someone we know and appear legitimate.
                     Once you click the attachment, download and install it, the malware also gets installed
                     into the computer.

                                                                                             E-mail and Malware Safety  81

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