Anti-script Virus Technical Research In Internet Environment

With the development and popularity of Internet, the safety of network was more and more noticed. Internet virus which have effected safety of network have fast developed, As the same time, computer anti-virus technology has been made a great progress.Nowadays there are some new and advanced anti-virus techniques, such as real-time scanning, heuristic code scanning, virtual machine and active kernel technique etc. These technology have advantage and disadvantage, but they all are not special mature. The existing anti-virus software plays an important role to deal with computer viruses. But it still has not satisfied the lacks effective methods to deal with unknown viruses especially.This thesis has an emphases analysis on script virus, which is one of the viruses that are widely in Internet. According to the different characteristic of the script virus, we divided script virus into the pure script virus and the mix type virus. The pure script virus mainly is the macro-virus. This paper divided the mix type virus into the mail-virus and worm virus, and then analyzed thoroughly the essential characteristics and spreading means of these three kinds of different viruses. According to characteristic of these viruses, this thesis put out a project of "Intelligent Macro Code Scanning Technique" to macro-virus, a project of "Base of Command Code Scanning Technique" for mail virus and a project of "File Head Check-Up Method" for worm virus to protect file of PE type. These scheme does not need the characteristic database of computer viruses, and can take precautions against some unknown viruses in real time.In the end, this thesis incorporates schemas of mail virus and worm virus in one schema and carries out the schema. In addition, it shows some script language and PE file type of computer virus etc.