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The China-lined threat actor behind the zero-day exploitation of security flaws in Microsoft Exchange servers in January 2021 has shifted its tactics to target the information technology (IT) supply chain as a means to obtain initial access to corporate networks
Microsoft and the Ukraine CERT warn of new attacks by the Russian state-sponsored Turla hacking group, targeting the defense industry and Microsoft Exchange servers with a new 'DeliveryCheck' malware backdoor. [...]
Microsoft says Cuba ransomware threat actors are hacking their way into victims' networks via Microsoft Exchange servers unpatched against a critical server-side request forgery (SSRF) vulnerability also exploited in Play ransomware attacks. [...]
The notorious FIN7 hacking group uses an auto-attack system that exploits Microsoft Exchange and SQL injection vulnerabilities to breach corporate networks, steal data, and select targets for ransomware attacks based on financial size. [...]
The Cuba ransomware operation is exploiting Microsoft Exchange vulnerabilities to gain initial access to corporate networks and encrypt devices. [...]