Malicious ARJ archives
https://www.bleepingcomputer.com/news/security/hackers-backdoor-russian-state-industrial-orgs-for-data-theft/
Several state and key industrial organizations in Russia were attacked with a custom Go-based backdoor that performs data theft, likely aiding espionage operations.
Kaspersky first detected the campaign in June 2023, while in mid-August, the cybersecurity firm spotted a newer version of the backdoor that introduced better evasion, indicating ongoing optimization of the attacks.