"While this began as a nation-state attack, the vulnerabilities are being exploited by other criminal organizations, including new ransomware attacks, with the potential for other malicious activities. "This is the second time in the last four months that nation-state actors have engaged in cyberattacks with the potential to affect businesses and organizations of all sizes," Microsoft said. The other theory is that the threat actors independently discovered the same set of vulnerabilities, which were then exploited to stealthily conduct reconnaissance of target networks and steal mailboxes, before ramping up the attacks once the hackers figured out Microsoft was readying a patch. It is also being claimed that some tools used in the "second wave" of attacks towards the end of February are similar to proof-of-concept attack code that Microsoft shared with antivirus companies and other security partners on February 23, raising the possibility that threat actors may have gotten their hands on private disclosure that Microsoft shared with its security partners. The Wall Street Journal on Friday reported that investigators are focused on whether a Microsoft partner, with whom the company shared information about the vulnerabilities through its Microsoft Active Protections Program ( MAPP), either accidentally or purposefully leaked it to other groups. Join our webinar and learn how to stop ransomware attacks in their tracks with real-time MFA and service account protection.
Learn to Stop Ransomware with Real-Time Protection If you are using Microsoft Defender for Office 365 (formerly Microsoft 365 Advanced Threat Protection) in your mail environment and have experienced false clicks or false attachment opens, it is because Defender for Office 365 has link processing and attachment processing rules that are causing this.
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