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Microsoft says a threat actor gained access to cloud tenants hosting Microsoft Exchange servers in credential stuffing attacks, with the end goal of deploying malicious OAuth...
Microsoft says BlackCat ransomware affiliates are now attacking Microsoft Exchange servers using exploits targeting unpatched vulnerabilities. In at least one incident that Microsoft’s security experts observed,...
Security researchers have found a new post-exploitation framework that they dubbed IceApple, deployed mainly on Microsoft Exchange servers across a wide geography. IceApple is described as...
A newly discovered and uncommonly stealthy Advanced Persistent Threat (APT) group is breaching corporate networks to steal Exchange (on-premise and online) emails from employees involved in...
In 2021, threat actors aggressively exploited newly disclosed critical software vulnerabilities to hit a broad set of targets worldwide, says the latest advisory published by the US Cybersecurity and Infrastructure...
Bug hunters that discover and report high-impact security vulnerabilities in on-premises Exchange, SharePoint and Skype for Business may earn as much as $26,000 per eligible submission, Microsoft has announced....
Security researchers have uncovered a long-running malicious campaign from hackers associated with the Chinese government who are using VLC Media Player to launch a custom malware...
The distribution of the IcedID malware has seen a spike recently due to a new campaign that hijacks existing email conversation threads and injects malicious payloads that...
The Cuba ransomware operation is exploiting Microsoft Exchange vulnerabilities to gain initial access to corporate networks and encrypt devices. Cybersecurity firm Mandiant tracks the ransomware gang...
Threat actors are hacking Microsoft Exchange servers using ProxyShell and ProxyLogon exploits to distribute malware and bypass detection using stolen internal reply-chain emails. When threat actors...
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