October 1, 2022 update – Added information about Exploit:Script/ExchgProxyRequest.A, Microsoft Defender AV’s robust detection for exploit behavior related to this threat. We also removed a section on MFA as a mitigation, which was included in a prior version of this ... continue reading

Not too long ago, it was the first day of school, then it was the first NFL game and we just passed the first day of fall.  As seasons change, I am reminded of the things that I should do ... continue reading

In recent months, Microsoft has detected a wide range of social engineering campaigns using weaponized legitimate open-source software by an actor we track as ZINC. Microsoft Threat Intelligence Center (MSTIC) observed activity targeting employees in organizations across multiple industries including ... continue reading

Microsoft researchers recently investigated an attack where malicious OAuth applications were deployed on compromised cloud tenants and then used to control Exchange servers and spread spam. The investigation revealed that the threat actor launched credential stuffing attacks against high-risk accounts ... continue reading

Our analysis of a recent version of a previously reported info-stealing Android malware, delivered through an ongoing SMS campaign, demonstrates the continuous evolution of mobile threats. Masquerading as a banking rewards app, this new version has additional remote access trojan ... continue reading

We discussed Microsoft Detection and Response Team’s (DART) threat hunting principles in part 1 of The art and science behind Microsoft threat hunting blog series. In this follow-up post, we will talk about some general hunting strategies, frameworks, tools, and ... continue reading

Attackers are constantly evolving, becoming increasingly sophisticated and destructive—the median time for an attacker to access your private data if you fall victim to a phishing email is 1 hour, 12 minutes.1 Microsoft tracks more than 35 ransomware families and ... continue reading

What changes after compromise recovery? After the final compromise recovery, steps have been completed and we are back in control. There has been a round of applause and many sighs of relief.  Now what? Is everything going back to as ... continue reading

This blog post is part of the Microsoft Intelligent Security Association guest blog series. Learn more about MISA.  Endpoint protection platforms (EPPs) are dead and no longer sufficient to protect your organization, right? Wrong. When it comes to cybersecurity, the ... continue reading

We work closely with customers using Azure Policy and have seen many different methods of deploying and maintaining it, from manual to over-complicated automated methods, everyone has a unique way of doing it. This code was developed to make policy ... continue reading