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Investigating a unique “form” of email delivery for IcedID malware

Investigating a unique “form” of email delivery for IcedID malware

Microsoft threat analysts have been tracking activity where contact forms published on websites are abused to deliver malicious links to enterprises using emails with fake legal threats. The emails instruct recipients to click a link to review supposed evidence behind ... continue reading
Analyzing attacks taking advantage of the Exchange Server vulnerabilities

Analyzing attacks taking advantage of the Exchange Server vulnerabilities

Microsoft continues to monitor and investigate attacks exploiting the recent on-premises Exchange Server vulnerabilities. These attacks are now performed by multiple threat actors ranging from financially motivated cybercriminals to state-sponsored groups. To help customers who are not able to immediately ... continue reading
GoldMax, GoldFinder, and Sibot: Analyzing NOBELIUM’s layered persistence

GoldMax, GoldFinder, and Sibot: Analyzing NOBELIUM’s layered persistence

Microsoft continues to work with partners and customers to expand our knowledge of the threat actor behind the nation-state cyberattacks that compromised the supply chain of SolarWinds and impacted multiple other organizations. As we have shared previously, we have observed ... continue reading
HAFNIUM targeting Exchange Servers with 0-day exploits

HAFNIUM targeting Exchange Servers with 0-day exploits

Microsoft has detected multiple 0-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks. In the attacks observed, the threat actor used these vulnerabilities to access on-premises Exchange servers which enabled access to ... continue reading
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Importance of Browser Updates and Browser Based Security Controls

Introduction   This is John Barbare and I am a Sr. Customer Engineer at Microsoft focusing on all things in the Cybersecurity space. It has been a while since I have had time to sit down and write a security blog due to studying and making sure I ... continue reading
Number of DDoS attacks during COVID-19 outbreak

Azure DDoS Protection—2020 year in review

This blog post was co-authored by Anupam Vij, Principal PM Manager & Syed Pasha, Principal Network Engineer, Azure Networking. 2020 was a year unlike any other. It brought major disruptions to both the physical and digital worlds, and these changes ... continue reading
ZINC attacks against security researchers

ZINC attacks against security researchers

In recent months, Microsoft has detected cyberattacks targeting security researchers by an actor we track as ZINC. The campaign originally came to our attention after Microsoft Defender for Endpoint detected an attack in progress. Observed targeting includes pen testers, private ... continue reading
Timeline graph showing developments in the Solorigate attack

Deep dive into the Solorigate second-stage activation: From SUNBURST to TEARDROP and Raindrop

More than a month into the discovery of Solorigate, investigations continue to unearth new details that prove it is one of the most sophisticated and protracted intrusion attacks of the decade. Our continued analysis of threat data shows that the ... continue reading
Diagram of the high-level Solorigate attack chain

Using Microsoft 365 Defender to protect against Solorigate

Microsoft security researchers continue to investigate and respond to the sophisticated cyberattack known as Solorigate (also referred to as Sunburst by FireEye) involving a supply chain compromise and the subsequent compromise of cloud assets. While the related investigations and impact ... continue reading
Analyzing Solorigate, the compromised DLL file that started a sophisticated cyberattack, and how Microsoft Defender helps protect customers

Analyzing Solorigate, the compromised DLL file that started a sophisticated cyberattack, and how Microsoft Defender helps protect customers

We, along with the security industry and our partners, continue to investigate the extent of the Solorigate attack. While investigations are underway, we want to provide the defender community with intelligence to understand the scope, impact, remediation guidance, and product ... continue reading