PROBLEM TO BE SOLVED: To detect a possibility that an inspection target device may be affected by malware regardless of whether or not malware diagnostic software is installed in the inspection target device, and even in such a situation that the inspection target device cannot be connected to the malware diagnostic device.SOLUTION: A suspicious file collection device 28 connectable to an inspection target device includes: collection means 29 that collects, using a program activated by the inspection target device, suspicious files suspected to be affected by malware, from a predetermined area of a storage unit provided in the inspection target device; storage means 30 for storing the suspicious files; and transmission means 31 that transmits the suspicious files having been accumulated in the storage means to a monitoring device that monitors execution results of the suspicious files.SELECTED DRAWING: Figure 1
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