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Summary
Major sporting events, like the World Cup or the Olympics, are usually targets of cybercriminals that take advantage of the event’s popularity. During the 2018 World Cup, for example, an infected document disguised as a “game prediction” delivered malware that stole sensitive data from its victims, including keystrokes and screenshots.
A new malware threat emerged just before the 2020 Tokyo Olympics opening ceremony, able to damage an infected system by wiping its files. The malware disguises itself as a PDF document containing information about cyber attacks associated with the Tokyo Olympics. The wiper component deletes documents created using Ichitaro, a popular word processor in Japan. This wiper is much simpler than “Olympic Destroyer”, which was used to target the 2018 Winter Olympics.
Threat
The file was circulated under the name “【至急】東京オリンピック開催に伴うサイバー攻撃等発生に関する被害報告について”, which translates into “[Urgent] About damage reports regarding the occurrence of cyber attacks, etc. associated with the Tokyo Olympics”.
The file is packed with UPX and was apparently compiled on “2021-07-19” at “22:52:05”, and although this information can’t be 100% reliable, this date is just one day before its first public appearance.
The developer included a lot of anti-analysis and anti-debugging techniques. The first one is a simple trick that detects if the file is being executed in a sandbox by using the APIs