This is a summarized report on the activities of hacker groups, also known as Threat Actor Groups, for the period from September 21, 2023, to October 20, 2023. The report, entitled “Monthly Threat Actor Group Intelligence Report, October 2023 (JPN)”, is based on data and information gathered by NSHC’s ThreatRecon. In October this year, activities of a total of 31 hacking groups were identified. The group SectorJ was the most active, accounting for 33% of the activities, followed by the …