Windows administrators from numerous organizations report widespread account lockouts triggered by false positives in the rollout of a new Microsoft Entra ID's
Since October 2024, Microsoft Defender Experts has observed and helped multiple customers address campaigns leveraging Node.js to deliver malware and other payloads that ultimately lead to information theft and data exfiltration.
In the past months Microsoft has seen multiple campaigns involving Node.js to deliver malware and other malicious payloads.
Microsoft on Tuesday issued a warning over the increasing use of Node.js for the delivery of malware and other malicious payloads.
The tech giant has been seeing such attacks aimed at its customers since October 2024 and some of the observed campaigns are still active in April 2025.
Microsoft Threat Intelligence Center (MSTIC) and Microsoft Security Response Center (MSRC) have discovered post-compromise exploitation of a zero-day elevation of privilege vulnerability in the Windows Common Log File System (CLFS) against a small number of targets. The targets include organizations in the information technology (IT) and real estate sectors of the United States, the financial sector in Venezuela, a Spanish software company, and the retail sector in Saudi Arabia. Microsoft released security updates to address the vulnerability, tracked as CVE-2025-29824, on April 8, 2025.
EncryptHub, a notorious threat actor linked to breaches at 618 organizations, is believed to have reported two Windows zero-day vulnerabilities to Microsoft, revealing a conflicted figure straddling the line between cybercrime and security research.
By leveraging Microsoft Security Copilot to expedite the vulnerability discovery process, Microsoft Threat Intelligence uncovered several vulnerabilities in multiple open-source bootloaders, impacting all operating systems relying on Unified Extensible Firmware Interface (UEFI) Secure Boot as well as IoT devices. The vulnerabilities found in the GRUB2 bootloader (commonly used as a Linux bootloader) and U-boot and Barebox bootloaders (commonly used for embedded systems), could allow threat actors to gain and execute arbitrary code.
Starting in December 2024, leading up to some of the busiest travel days, Microsoft Threat Intelligence identified a phishing campaign that impersonates online travel agency Booking.com and targets organizations in the hospitality industry. The campaign uses a social engineering technique called ClickFix to deliver multiple credential-stealing malware in order to conduct financial fraud and theft. […]
Two malicious VSCode Marketplace extensions were found deploying in-development ransomware from a remote server, exposing critical gaps in Microsoft's review process.
Silk Typhoon is a Chinese state actor focused on espionage campaigns targeting a wide range of industries in the US and throughout the world. In recent months, Silk Typhoon has shifted to performing IT supply chain attacks to gain access to targets. In this blog, we provide an overview of the threat actor along with insight into their recent activity as well as their longstanding tactics, techniques, and procedures (TTPs), including a persistent interest in the exploitation of zero-day vulnerabilities in various public-facing appliances and moving from on-premises to cloud environments.
Microsoft Threat Intelligence Center discovered an active and successful device code phishing campaign by a threat actor we track as Storm-2372. Our ongoing investigation indicates that this campaign has been active since August 2024 with the actor creating lures that resemble messaging app experiences including WhatsApp, Signal, and Microsoft Teams. Storm-2372’s targets during this time have included government, non-governmental organizations (NGOs), information technology (IT) services and technology, defense, telecommunications, health, higher education, and energy/oil and gas in Europe, North America, Africa, and the Middle East. Microsoft assesses with medium confidence that Storm-2372 aligns with Russian interests, victimology, and tradecraft.
Microsoft Threat Intelligence observed limited activity by an unattributed threat actor using a publicly available, static ASP.NET machine key to inject malicious code and deliver the Godzilla post-exploitation framework. In the course of investigating, remediating, and building protections against this activity, we observed an insecure practice whereby developers have incorporated various publicly disclosed ASP.NET machine keys from publicly accessible resources, such as code documentation and repositories, which threat actors have used to launch ViewState code injection attacks and perform malicious actions on target servers.
A help desk phishing campaign targets an organization's Microsoft Active Directory Federation Services (ADFS) using spoofed login pages to steal credentials and bypass multi-factor authentication (MFA) protections.
#ADFS #Account #Computer #InfoSec #Lateral #MFA #Microsoft #Notification #Phishing #Push #Security #Takeover
In mid-November 2024, Microsoft Threat Intelligence observed the Russian threat actor we track as Star Blizzard sending their typical targets spear-phishing messages, this time offering the supposed opportunity to join a WhatsApp group. This is the first time we have identified a shift in Star Blizzard’s longstanding tactics, techniques, and procedures (TTPs) to leverage a […]
Apple recently addressed a macOS vulnerability that allows attackers to bypass System Integrity Protection (SIP) and install malicious kernel drivers by loading third-party kernel extensions.
#Apple #Computer #InfoSec #Integrity #Microsoft #Protection #SIP #Security #System #Vulnerability #macOS
The defendants used stolen API keys to gain access to devices and accounts with Microsoft’s Azure OpenAI service, which they then used to generate “thousands” of images that violated content restrictions.
In December 2024, two Windows Lightweight Directory Access Protocol (LDAP) vulnerabilities were identified by independent security researcher Yuki Chen: CVE-2024-49112, a remote code execution (RCE) flaw with a 9.8 CVSS score, and CVE-2024-49113, a denial-of-service (DoS) flaw with a 7.5 CVSS score.
Akamai security researcher Tomer Peled explored new ways to use and abuse Microsoft's UI Automation framework and discovered an attack technique that evades endpoint detection and response (EDR).
To exploit this technique, a user must be convinced to run a program that uses UI Automation. This can lead to stealthy command execution, which can harvest sensitive data, redirect browsers to phishing websites, and more.
Detection of this technique is challenging in several ways, including for EDR. All EDR technologies we have tested against this technique were unable to find any malicious activity.
This technique can be used on every Windows endpoint with operating system XP and above.
In this blog post, we provide a full write-up on how to (ab)use the UI Automation framework (including possible attacks that could leverage it) and we present a proof of concept (PoC) for each abuse vector we discuss. We also provide detection and mitigation options.
Oasis Security's research team uncovered a critical vulnerability in Microsoft's Multi-Factor Authentication (MFA) implementation, allowing attackers to bypass it and gain unauthorized access to the user’s account, including Outlook emails, OneDrive files, Teams chats, Azure Cloud, and more. Microsoft has more than 400 million paid Office 365 seats, making the consequences of this vulnerability far-reaching.
The bypass was simple: it took around an hour to execute, required no user interaction and did not generate any notification or provide the account holder with any indication of trouble.
This blog post discusses a data exposure risk in Microsoft Power Pages due to misconfigured access controls, highlighting the need for better security and monitoring.
At CYBERWARCON 2024, Microsoft Threat Intelligence analysts will share research and insights on North Korean and Chinese threat actors representing years of threat actor tracking, infrastructure monitoring and disruption, and their attack tooling.
