Suspicious email detection method, suspicious email detection system, suspicious email detection device, and computer-readable program

摘要

A technique for detecting suspicious emails suitable for detecting scattered attack emails is provided. A suspicious mail detection server 2 stores, in a suspicious mail list, predetermined pattern information determined by a text in a mail text of a suspicious mail that is an artificially determined e-mail that is likely to be a scattered attack mail. sign up. Then, when a target mail determination request, which is an e-mail that determines whether or not it is a suspicious mail, is received from the mail terminals 1-1 to 1-n, predetermined pattern information determined by the text in the mail text of the target mail Is registered in the suspicious mail list, and if it is registered, it is determined that there is a possibility that the target mail is a distributed attack mail, and the determination result is sent to the mail terminal 1 of the determination request transmission source. -1 to 1-n. [Selection] Figure 1