The volume of attacks against Microsoft Exchange servers has increased significantly since the ProxyLogon bugs were made public. With patches now released, attackers may be sensing that it is their last chance to infect systems. According to Check Point Research, “exploit attempts increased sixfold” across the span of a few days following the news. The most targeted sectors were government and military at 27 per cent of attacks. Microsoft also announced that it had detected a new strand of ransomware, known as DearCry, which attackers were attempting to install in infected systems.