Rise in XorDdos: A deeper look at the stealthy DDoS malware targeting Linux devices

Observing a 254% increase in activity over the last six months from a versatile Linux trojan called XorDdos, the Microsoft 365 Defender research team provides in-depth analysis into this stealthy malware’s capabilities and key infection signs.
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In hot pursuit of ‘cryware’: Defending hot wallets from attacks

The rise in cryptocurrency market capitalization paved the way to the emergence of threats Microsoft security researchers are referring to as “cryware”—information stealers focused on gathering and exfiltrating data from non-custodial cryptocurrency wallets.
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Center for Threat-Informed Defense, Microsoft, and industry partners streamline MITRE ATT&CK® matrix evaluation for defenders

The Center for Threat-Informed Defense, along with Microsoft and industry partners, collaborated on a repeatable methodology and a web-based calculator, aiming to streamline MITRE ATT&CK® use for defenders.
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Ransomware-as-a-service: Understanding the cybercrime gig economy and how to protect yourself

Microsoft coined the term “human-operated ransomware” to clearly define a class of attack driven by expert humane intelligence at every step of the attack chain and culminate in intentional business disruption and extortion. In this blog, we explain the ransomware-as-a-service affiliate model and disambiguate between the attacker tools and the various threat actors at play during a security incident.
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Microsoft finds new elevation of privilege Linux vulnerability, Nimbuspwn

Microsoft has discovered several vulnerabilities, collectively referred to as Nimbuspwn, that could be chained together, allowing an attacker to elevate privileges to root on many Linux desktop endpoints. Leveraging Nimbuspwn as a vector for root access could allow attackers to achieve greater impact on vulnerable devices by deploying payloads and performing other malicious actions via arbitrary root code execution.
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Dismantling ZLoader: How malicious ads led to disabled security tools and ransomware

Microsoft took action against the ZLoader trojan by working with telecommunications providers around the world to disrupt key ZLoader infrastructure. In this blog, we detail the various characteristics for identifying ZLoader activity, including its associated tactics, recent campaigns, and affiliated payloads, such as ransomware.
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Tarrask malware uses scheduled tasks for defense evasion

Microsoft Detection and Response Team (DART) researchers have uncovered malware that creates “hidden” scheduled tasks as a defense evasion technique. In this post, we will demonstrate how threat actors create scheduled tasks, how they cover their tracks, and how the malware’s evasion techniques are used to maintain and ensure persistence on systems.
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Microsoft 365 Defender demonstrates industry-leading protection in the 2022 MITRE Engenuity ATT&CK® Evaluations

For the fourth consecutive year, Microsoft 365 Defender demonstrated industry-leading protection in MITRE Engenuity’s independent ATT&CK® Enterprise Evaluations. These results highlighted the importance of taking an XDR-based approach spanning endpoints, identities, email and cloud, and the importance of both prevention and protection.
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SpringShell RCE vulnerability: Guidance for protecting against and detecting CVE-2022-22965

Microsoft provides guidance for customers looking for protection against exploitation and ways to detect vulnerable installations on their network of the critical vulnerability CVE-2022-22965, also known as SpringShell or Spring4Shell.
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Microsoft protects against human-operated ransomware across the full attack chain in the 2022 MITRE Engenuity ATT&CK® Evaluations

For the fourth year in a row, the independent MITRE Engenuity ATT&CK® Evaluations demonstrated that threats are no match for Microsoft’s multi-platform extended detection and response (XDR) defense capabilities.
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