Belgium’s Federal Public Service Interior (i.e., the country’s Interior Ministry) has suffered a “complex, sophisticated and targeted cyberattack.” What happened? When Microsoft released out-of-band security updates for Exchange Server in early March to fix zero-day vulnerabilities exploited by the Hafnium threat actor, the FBS Interior called in the Center for Cybersecurity Belgium (CCB) to help with the patching of their Exchange servers.

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