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Method for Inferring Maliciousness of Email and Detecting a Virus Pattern

Provided is a method of distinguishing an abnormal e-mail and determining whether an e-mail is affected with a virus. The method includes the steps of: decoding a received e-mail packet in a readable format and then analyzing and classifying a header of the packet according to header information; determining whether each classified piece of header information is normal or abnormal, and giving a specific value to the corresponding header information according to the determination result; distinguishing an abnormal e-mail using the specific values given to the respective pieces of header information according to a logical inference rule; and when there is an executable attachment file among the header information of the e-mail distinguished as abnormal, determining whether the abnormal e-mail is infected with a virus using distribution of similarity among data. The method effectively distinguishes an abnormal e-mail and determines whether an e-mail is infected with a virus without a database for spam filtering or a database of virus information, and thus is capable of stopping the propagation of new viruses. Therefore, an e-mail server can have a security technique and handle abnormal e-mail in a step before operation of a spam filter server or an antivirus server. Consequently, it is possible to manage a mail server more securely.
Owner:SAMSUNG SDS CO LTD

Method for inferring maliciousness of email and detecting a virus pattern

Provided is a method of distinguishing an abnormal e-mail and determining whether an e-mail is affected with a virus. The method includes the steps of: decoding a received e-mail packet in a readable format and then analyzing and classifying a header of the packet according to header information; determining whether each classified piece of header information is normal or abnormal, and giving a specific value to the corresponding header information according to the determination result; distinguishing an abnormal e-mail using the specific values given to the respective pieces of header information according to a logical inference rule; and when there is an executable attachment file among the header information of the e-mail distinguished as abnormal, determining whether the abnormal e-mail is infected with a virus using distribution of similarity among data. The method effectively distinguishes an abnormal e-mail and determines whether an e-mail is infected with a virus without a database for spam filtering or a database of virus information, and thus is capable of stopping the propagation of new viruses. Therefore, an e-mail server can have a security technique and handle abnormal e-mail in a step before operation of a spam filter server or an antivirus server. Consequently, it is possible to manage a mail server more securely.
Owner:SAMSUNG SDS CO LTD
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