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Microsoft Security Blog

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New macOS vulnerability, “HM Surf”, could lead to unauthorized data access 

Microsoft Threat Intelligence uncovered a macOS vulnerability that could potentially allow an attacker to bypass the operating system’s Transparency, Consent, and Control (TCC) technology and gain unauthorized access to a user’s protected data. The vulnerability, which we refer to as “HM Surf”, involves removing the TCC protection for the Safari browser directory and modifying a […]

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Published
5 min read

Escalating cyber threats demand stronger global defense and cooperation 

We must find a way to stem the tide of this malicious cyber activity. That includes continuing to harden our digital domains to protect our networks, data, and people at all levels. However, this challenge will not be accomplished solely by executing a checklist of cyber hygiene measures but only through a focus on and commitment to the foundations of cyber defense from the individual user to the corporate executive and to government leaders.  

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Layout of education-related items on a desk and a representation of cyberthreat vectors, next to the title text “Cyber Signals Issue 8, From Classrooms to Research Labs: Cyberthreats in K-12 and Higher Education, by Cyber Signals, A Microsoft Threat Intelligence Report.”
Published
12 min read

​​Cyber Signals Issue 8 | Education under siege: How cybercriminals target our schools​​ 

​This edition of Cyber Signals delves into the cybersecurity challenges facing classrooms and campuses, highlighting the critical need for robust defenses and proactive measures. From personal devices to virtual classes and research stored in the cloud, the digital footprint of school districts, colleges, and universities has multiplied exponentially.​

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File hosting services misused for identity phishing 

Since mid-April 2024, Microsoft has observed an increase in defense evasion tactics used in campaigns abusing file hosting services like SharePoint, OneDrive, and Dropbox. These campaigns use sophisticated techniques to perform social engineering, evade detection, and compromise identities, and include business email compromise (BEC) attacks.

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Storm-0501: Ransomware attacks expanding to hybrid cloud environments 

Microsoft has observed the threat actor tracked as Storm-0501 launching a multi-staged attack where they compromised hybrid cloud environments and performed lateral movement from on-premises to cloud environment, leading to data exfiltration, credential theft, tampering, persistent backdoor access, and ransomware deployment. The said attack targeted multiple sectors in the United States, including government, manufacturing, transportation, […]