P6.8 – Business Risks - Trojans
{"Image DocumentName": "P6.8 \u2013 Business Risks - Trojans", "Image ImageDescription": "A Trojan virus is malware that appears to perform a desirable function for the user prior to run or install but instead opens a door access of the user s computer system. It is a harmful piece of software that looks legitimate. Users are typically tricked into loading and executing it on their systems. A horse may modify the user s computer to display advertisements in undesirable places, such as the desktop or in uncontrollable pop-ups, or it may be less notorious, such as installing a toolbar on to the user s Web browser without prior notice. This can create revenue for the author of the Trojan. Trojan horses in this way require interaction with a hacker to fulfil their purpose. It is possible for individual hackers to scan computers on a network using a port scanner in the hope of finding one with a malicious Trojan horse installed, which the hacker can then use to control the target computer. Examples include: Code Red virus of 2001 provides a frightening example of the powerful combination of worms and Trojans. Code Red contaminated tens of thousands of computers and caused  2 billion in damages. After propagating itself using the techniques of a worm, Code Red attempted to use the coordinated power of infected machines to launch a distributed denial of service (DOS) attack against  at predetermined date. Backdoor.LegMir.BZ is a backdoor worm. On execution it installs itself as a legitimate program, copies itself with various names and at various locations on the infected machine, opens a port and gives unauthorised access to attackers. It also has the ability to capture passwords and send that information to the author of this program.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}