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Since finding and extracting a fixed signature for metamorphic viruses is hard due to the fact that, their shape changes frequently. Virus writers by using obfuscation methods make their viruses undetectable, in order to disable anti viruses to detect them easily, which ends in metamorphic viruses. We used hidden Markov model to propose the Detection Sphere method. We used three elements of a string...
Virus writers make their viruses undetectable by using obfuscation methods, which ends in metamorphic viruses. We propose a method named detection circle which is based on the hidden Markov Model theory. We have used three elements to characterize a family of viruses: string occurrence probability, specifically-located character occurrence probability, and the amount of virus similarities. For the...
Attacks such as XSS and SQL injections are still common in browser extensions due to the presence of potential vulnerabilities in extensions and some extensions are also malicious by design. As a consequence, much effort in the past has been spent on detecting vulnerable and malicious browser extensions. These techniques are limited to only detect either new forms of vulnerable or malicious extensions...
Binary signatures have been widely used to detect malicious software on the current Internet. However, this approach is unable to achieve the accurate identification of polymorphic malware variants, which can be easily generated by the malware authors using code generation engines. Code generation engines randomly produce varying code sequences but perform the same desired malicious functions. Previous...
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