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A diagram of the attack chain. It presents the flow of activity from left to right, starting with the attacker gaining access to its target tenant and leading to spam messages being sent to targets.

Malicious OAuth applications used to compromise email servers and spread spam

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
This diagram illustrates the typical infection chain of this Android malware. The infection starts from an SMS message that contains a malicious link that leads to the malicious APK.

Rewards plus: Fake mobile banking rewards apps lure users to install info-stealing RAT on Android devices

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
Diagram explaining the threat hunting cycle.

The art and science behind Microsoft threat hunting: Part 2

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

Azure Payment HSM achieves PCI PIN certification offering customers secure digital payments solutions in the cloud

This blog post has been co-authored by Darius Ryals, General Manager of Partner Promises and Azure Chief Information Security Officer. Today we’re announcing Azure Payment HSM has achieved Payment Card Industry Personal Identification Number (PCI PIN) making Azure the first hyperscale ... continue reading

New Windows 11 security features are designed for hybrid work

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

Test your team’s security readiness with the Gone Phishing Tournament

Why should you care about the behavioral risk of your employees? Eighty-two percent of breaches include (and often start with) user behavior.1 Not all are phishing, but a majority of them are just that. Phishing is, and has been for ... continue reading
Guidance for technical architecture relating to Microsoft Zero Trust Principles.

Implementing a Zero Trust strategy after compromise recovery

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
Two graphs showing that 39 percent of incidents were detected by Microsoft Defender for Cloud, while 23 percent were detected by Microsoft Sentinel.

Secure your endpoints with Transparity and Microsoft

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

The art and science behind Microsoft threat hunting: Part 1

At Microsoft, we define threat hunting as the practice of actively looking for cyberthreats that have covertly (or not so covertly) penetrated an environment. This involves looking beyond the known alerts or malicious threats to discover new potential threats and ... continue reading
An organizational chart of the different threat actors that worked together in attacking the Albanian government. The top level mentions Iran's Ministry of Intelligence and Security as the sponsor organization. A table on the left side lists down the threat actor group names and their corresponding aliases.

Microsoft investigates Iranian attacks against the Albanian government

Shortly after the destructive cyberattacks against the Albanian government in mid-July, the Microsoft Detection and Response Team (DART) was engaged by the Albanian government to lead an investigation into the attacks. At the time of the attacks and our engagement ... continue reading