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In order to create a malware program that is undetectable by present anti-viruses software application, one would require to have a deep understanding of how these programs work. This is because antivirus software application utilizes a variety of strategies to spot and eliminate malware, and a programmer would need to know how to avoid these detection methods.
One approach that antivirus software application uses to spot malware is signature-based detection. This includes the anti-virus software looking for a specific signature or «finger print» that is unique to a specific piece of malware. If the signature is discovered, the antivirus software will flag the file as being harmful and act to remove it. In order to develop a piece of malware that is undetectable by signature-based detection, a programmer would need to create a file that does not include the signature of any known pieces of malware.
Another approach that antivirus software application utilizes to find malware is behavior-based detection. This includes the software application observing the behavior of a file or program and identifying whether it is malicious based on its actions. A malware program might be found if it attempts to erase critical system files or encrypt individual data. In order to produce a piece of malware that is undetected by behavior-based detection, a developer would require to develop a file or program that does not show any harmful behavior.
A 3rd method that antivirus software uses to find malware is heuristic-based detection. This includes the software looking for signs that a file or program may be harmful, even if it does not match the signature of any recognized piece of malware. For example, a file might be flagged as being suspicious if it is huge or if it contains code that is generally utilized by malware programs. In order to develop a piece of malware that is undetected by heuristic-based detection, a programmer would require to create a file or program that does not show any of the indications that are typically related to malware.
Overall, it would be really challenging to produce a malware program that is undetected by present anti-viruses software. This is due to the fact that antivirus software application uses a range of different approaches to get rid full form of malware (on the main page) and spot malware, and a programmer would require to be knowledgeable about all of these methods in order to avoid detection.