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Analyze » Microsoft Security Response Center » MIC1779899267

Incident Score: Analysis & Impact (MIC1779899267)

The details regarding individual company incidents & reports gives you full view from every side.

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-9
Company Score Before Incident586 / 1000
Company Score After Incident577 / 1000
Company LinkView Microsoft Security Response Center Profile
INCIDENT NUMBERMIC1779899267
Type of Cyber IncidentVulnerability
ATTACK VECTORLocal
DATA EXPOSEDNA
INCIDENT DATE31/03/2026
STATUSpublished

Key Highlights From The Incident Analysis

  • Timeline of Microsoft Security Response Center's Vulnerability and lateral movement inside company's environment.
  • Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
  • How Rankiteo’s incident engine converts technical details into a normalized incident score.
  • How this cyber incident impacts Microsoft Security Response Center Rankiteo cyber scoring and cyber rating.
  • Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.

Full Incident Analysis Transcript

In this Rankiteo incident briefing, we review the Microsoft Security Response Center breach identified under incident ID MIC1779899267.

The analysis begins with a detailed overview of Microsoft Security Response Center's information like the linkedin page: https://www.linkedin.com/company/microsoft-security-response-center, the number of followers: 54723, the industry type: Computer and Network Security and the number of employees: None 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 586 and after the incident was 577 with a difference of -9 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 Microsoft Security Response Center and their customers.

Microsoft Windows recently reported "Critical Windows Kernel Flaw (CVE-2026-40369) Enables SYSTEM-Level Privilege Escalation", a noteworthy cybersecurity incident.

A newly disclosed Windows kernel vulnerability, CVE-2026-40369, allows attackers to achieve full SYSTEM-level privilege escalation even from highly restricted environments like browser sandboxes.

The disruption is felt across the environment, affecting Windows 11 versions 24H2 through 25H2.

Formal response steps have not been shared publicly yet.

The case underscores how teams are taking away lessons such as Highlights persistent risks in kernel attack surfaces, even in well-audited code paths, and recommending next steps like Monitor for unusual NtQuerySystemInformation usage and prepare for forthcoming updates.

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.

MITRE ATT&CK® Correlation Analysis

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-2026-40369 allows SYSTEM-level privilege escalation, and flaw affects Windows 11 versions 24H2 through 25H2. Under the Defense Evasion tactic, the analysis identified Indicator Removal (T1066) with moderate to high confidence (70%), with evidence including bypasses ProbeForWrite validation, and manipulate kernel memory without triggering faults and Impair Defenses: Disable or Modify Tools (T1562.001) with moderate confidence (60%), supported by evidence indicating bypasses Kernel Address Space Layout Randomization (KASLR). Under the Execution tactic, the analysis identified Command and Scripting Interpreter (T1059) with moderate to high confidence (80%), with evidence including spawn a SYSTEM-level command shell, and injecting malicious code into high-privilege processes. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with moderate to high confidence (70%), supported by evidence indicating accessible from sandboxed environments like Chrome, Edge, and Firefox renderers. Under the Credential Access tactic, the analysis identified OS Credential Dumping: Proc Filesystem (T1003.007) with moderate to high confidence (70%), supported by evidence indicating extracting sensitive kernel data, locating the EPROCESS structure. Under the Discovery tactic, the analysis identified System Information Discovery (T1082) with moderate to high confidence (80%), supported by evidence indicating ntQuerySystemInformation syscall (information class 253, SystemProcessInformationExtension). These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Privilege Escalation
Exploitation for Privilege Escalation (95%)
Defense Evasion
Indicator Removal (70%)
Impair Defenses: Disable or Modify Tools (60%)
Execution
Command and Scripting Interpreter (80%)
Initial Access
Exploit Public-Facing Application (70%)
Credential Access
OS Credential Dumping: Proc Filesystem (70%)
Discovery
System Information Discovery (80%)

Sources & References