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Programs that are designed by hackers to be used in attacking other systems are known as malware and tend to be quite harmful. Malware is the kind of application that eats into a system and once it has found a spot for gaining access into it, starts to eat into the details. Malware is of a very destructive nature and causes damage to information systems by corrupting their information and causes the programs in these systems to stop working. Malware is built by hackers for simply bringing about damage and causing destruction to systems without any positive benefit to the programs. These programs are known to cause widespread havoc to information systems and once they have begun to attack one of the computers, will keep on eating into the information until they have completely crippled the systems.

The malware that gets into a system will bring performance problems for a system even though some of the systems designed have protective measures put in place to shut down portions of the system that have been infected with malware.  Protecting against malware is one of the ways that a system can be kept clean and performing without interruptions as well as keeping the enemies out of a system.

Firewalls, on the other hand, prevent the malware from getting into the system and there are programs that are known to scan systems for signs of malware activity taking place within the code that forms up the system. These scanners will easily detect the malware even before an attack can be completed and blocks the IP addresses of the systems that are trying to infect a system with the malware. Any malware that does not get detected by a system will gain access but not all of it is effective on the system since the hacker might not have programmed destructive capabilities into the programs. Additionally, the malware will only be active if it has found a system that is compatible with it and set up in such a manner that the malware can grow gradually into the file system without being detected.

However, the security standards of modern systems prevent malware from causing any damage to a system and alert the system administrators about the issues that are causing system performance to go down early enough. It is useful to regularly scan information systems for signs of malware activity and any suspicious source code or code signatures that are evident of malware trying to take over a system. The programmer of any malware will have a goal to achieve in mind and if they have succeeded to get this into the program, then they will be likely to succeed once they have uploaded the malware into the system.

Information systems are very sensitive and the information they work with is always regarded as useful and kept very securely. Safety of this information means staying safe from malware which involves regularly scanning for signs of malware and the system running on top security. This is the reason many information systems have firewalls and internal scanners to keep them safe and in the best condition.