Russia-Linked APT28 Group Uses Signal Chats to Target Ukrainian Officials with New Malware

The Russia-linked cyberespionage group APT28 is using Signal chats to target Ukrainian government officials with new types of malware, named BeardShell and SlimAgent. Although Signal remains secure, the attackers are exploiting its growing popularity among officials. The article does not provide specific technical details of the malware. The current impact of this campaign is not specified.