A verification information modification device comprising: an acquisition unit configured to acquire, from verification devices that use verification information of software installed on the verification devices to verify a file forming the software, an error log relating to erroneous detection that has occurred in the verification device and to acquire configuration information on a file stored in the verification device from each verification device, and wherein the erroneous detection has occurred in the stored file; an information creation unit configured to, when it is determined that a same error has occurred in a predetermined number or more of the verification devices based on the acquired error log, extract an error log of the error from acquired error logs and create information indicating verification information that has caused the erroneous detection and candidates for modification details of the verification information based on the extracted error log; and an output unit configured to output the information indicating verification information that has caused the erroneous detection and the candidates for modification details of the verification information; a modification unit configured to modify the verification information based on information selected from among the output candidates; a transmission unit to transmit the modified verification information to the verification devices for execution of verification processing using the modified verification information; and wherein the information creation unit is configured to, when it is determined based on the extracted error log and the configuration information on the stored file that the erroneous detection is caused because a verification target directory set in the verification information is a directory to which the stored file is added depending on a situation of the verification device, set a candidate for modification details of the verification information as change to exclude the verification target directory indicated in the verification information from a verification target. an acquisition unit configured to acquire, from verification devices that use verification information of software installed on the verification devices to verify a file forming the software, an error log relating to erroneous detection that has occurred in the verification device and to acquire configuration information on a file stored in the verification device from each verification device, and wherein the erroneous detection has occurred in the stored file; an information creation unit configured to, when it is determined that a same error has occurred in a predetermined number or more of the verification devices based on the acquired error log, extract an error log of the error from acquired error logs and create information indicating verification information that has caused the erroneous detection and candidates for modification details of the verification information based on the extracted error log; and an output unit configured to output the information indicating verification information that has caused the erroneous detection and the candidates for modification details of the verification information; a modification unit configured to modify the verification information based on information selected from among the output candidates; a transmission unit to transmit the modified verification information to the verification devices for execution of verification processing using the modified verification information; and wherein the information creation unit is configured to, when it is determined based on the extracted error log and the configuration information on the stored file that the erroneous detection is caused because a verification target directory set in the verification information is a directory to which the stored file is added depending on a situation of the verification device, set a candidate for modification details of the verification information as change to exclude the verification target directory indicated in the verification information from a verification target.