Devoteam | Microsoft Partner Breach Incident Score: Analysis & Impact (DEV0832208111225)

In this Rankiteo incident briefing, we review the Devoteam | Microsoft Partner breach identified under incident ID DEV0832208111225.

The analysis begins with a detailed overview of Devoteam | Microsoft Partner's information like the linkedin page: https://www.linkedin.com/company/devoteam-m-cloud, the number of followers: 36229, the industry type: IT Services and IT Consulting and the number of employees: 326 employees

After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 754 and after the incident was 752 with a difference of -2 which is could be a good indicator of the severity and impact of the incident.

In the next step of the video, we will analyze in more details the incident and the impact it had on Devoteam | Microsoft Partner and their customers.

On 12 November 2025, Microsoft disclosed Vulnerability Disclosure, Privilege Escalation and Remote Code Execution (RCE) issues under the banner "Microsoft November 2025 Patch Tuesday: Actively Exploited Windows Kernel Flaw (CVE-2025-62215) and Other Critical Vulnerabilities".

Microsoft's November 2025 Patch Tuesday addressed over 60 vulnerabilities, including an actively exploited Windows Kernel flaw (CVE-2025-62215), a memory corruption issue stemming from a race condition allowing local elevation of privileges to SYSTEM.

The disruption is felt across the environment, affecting Windows Kernel (Privilege Escalation), Windows Applications (RCE via GDI+) and Microsoft Office (RCE via Malicious Files).

In response, teams activated the incident response plan, moved swiftly to contain the threat with measures like Release of Patch Tuesday updates (November 2025), Out-of-band update for Windows 10 ESU enrollment issues and Guidance to subscribe to Windows 10 ESU and apply mitigations, and began remediation that includes Patches for CVE-2025-62215, CVE-2025-60724, CVE-2025-62199, CVE-2025-62222, Disabling Preview Pane in Outlook (mitigation for CVE-2025-62199) and Avoiding interaction with untrusted GitHub issues (mitigation for CVE-2025-62222), and stakeholders are being briefed through Public advisory via Microsoft Security Update Guide, Collaboration with security researchers for technical details and Media outreach (e.g., quotes from Trend Micro, Ivanti, Rapid7, Immersive Labs).

The case underscores how Ongoing (Limited exploitation observed for CVE-2025-62215; no confirmed exploits for other CVEs), teams are taking away lessons such as Race conditions in kernel-level components can be reliably exploited when paired with other vulnerabilities (e.g., code execution bugs), Legacy systems (Windows 10, Exchange 2016/2019) remain high-risk targets without extended support and Developer tools (e.g., VS Code extensions) are emerging attack vectors via trusted platforms like GitHub, and recommending next steps like {'for': 'Enterprises', 'actions': ['Immediately apply November 2025 Patch Tuesday updates, prioritizing CVE-2025-62215 and CVE-2025-60724.', 'Enroll in Windows 10 ESU if still using Windows 10 post-EoL.', 'Migrate from Exchange 2016/2019 to Exchange SE before the 6-month ESU period ends.', 'Disable Preview Pane in Outlook to mitigate CVE-2025-62199.', 'Educate developers on risks associated with VS Code extensions and GitHub issues (CVE-2025-62222).']}, {'for': 'Developers', 'actions': ['Update Visual Studio Code and CoPilot Chat Extension to the latest patched version.', 'Avoid enabling non-standard modes on GitHub issues from untrusted sources.', 'Monitor for suspicious commands in issue descriptions or pull requests.']} and {'for': 'Security Teams', 'actions': ['Monitor for exploitation attempts targeting CVE-2025-62215 (privilege escalation) and CVE-2025-60724 (RCE).', 'Implement network segmentation for systems running legacy Windows or Exchange versions.', 'Review Microsoft’s mitigation guidance for high-severity vulnerabilities.']}, with advisories going out to stakeholders covering Microsoft advises all customers to apply patches immediately, especially for actively exploited vulnerabilities, Organizations using Windows 10 post-EoL are urged to enroll in ESU or upgrade to supported versions and Exchange Server administrators are recommended to migrate to Exchange SE before the ESU period ends.

Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.

The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.

Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with high confidence (95%), with evidence including cVE-2025-62215 such as Memory corruption due to race condition in Windows Kernel, allowing **local elevation of privileges to SYSTEM**, and actively exploited Windows Kernel flaw... enabling local privilege escalation to SYSTEM. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with high confidence (90%), with evidence including cVE-2025-60724 such as heap-based buffer overflow in GDI+ **allowing remote code execution without user interaction**, and remote code execution (RCE) without user interaction via malicious documents or web uploads, Phishing: Spearphishing Attachment (T1566.001) with moderate to high confidence (85%), with evidence including cVE-2025-62199 such as use-after-free in Microsoft Office, exploitable via **malicious files** or Preview Pane, and malicious documents or web uploads, and Supply Chain Compromise: Compromise Software Dependencies and Development Tools (T1195.002) with moderate to high confidence (80%), with evidence including cVE-2025-62222 such as command injection in **VS Code CoPilot Chat Extension**, allowing RCE via **malicious GitHub issues**, and trusted toolchain compromises... malicious GitHub issues with hidden commands. Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with high confidence (90%), with evidence including cVE-2025-62199 such as exploitable via malicious files or **Preview Pane to achieve code execution**, and cVE-2025-60724 such as remote code execution without user interaction via malicious documents and Command and Scripting Interpreter: PowerShell (T1059.001) with moderate to high confidence (70%), supported by evidence indicating cVE-2025-62222 such as malicious GitHub issues with **hidden commands** could trigger RCE in developer environments. Under the Defense Evasion tactic, the analysis identified Exploitation for Defense Evasion (T1211) with moderate to high confidence (80%), with evidence including preview Pane as an attack vector, **increasing exploitation odds by bypassing user warnings**, and cVE-2025-62199 leverages the Preview Pane as an attack vector, **bypassing user warnings** and Indicator Removal: File Deletion (T1070.004) with moderate confidence (60%), supported by evidence indicating vulnerabilities are often **chained with other exploits** to fully compromise systems (implies post-exploitation cleanup). Under the Lateral Movement tactic, the analysis identified Remote Services: SMB/Windows Admin Shares (T1021.002) with moderate to high confidence (75%), with evidence including flaws pose elevation-of-privilege and RCE risks, **enabling follow-on attacks like lateral movement**, and risk of SYSTEM-level compromise on affected Windows systems. Under the Impact tactic, the analysis identified Data Encrypted for Impact (T1486) with moderate confidence (50%), supported by evidence indicating potentially enabling follow-on attacks like... **system takeovers** if left unpatched and Data Destruction (T1485) with moderate confidence (50%), supported by evidence indicating risk of **operational disruption** (implied post-exploitation impact). Under the Credential Access tactic, the analysis identified OS Credential Dumping: LSASS Memory (T1003.001) with moderate to high confidence (70%), with evidence including risk of **credential theft** (post-SYSTEM escalation via CVE-2025-62215), and flaws pose... risks, potentially enabling follow-on attacks like... **credential theft**. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.