Detect CVE-2026-32202 Microsoft Windows Protection Mechanism Failure in Google Chronicle
Detects exploitation of CVE-2026-32202, a Microsoft Windows Protection Mechanism Failure vulnerability (CWE-693) listed in CISA KEV. This vulnerability allows attackers to bypass security controls in Windows, potentially enabling privilege escalation, defense evasion, or code execution. Detection focuses on anomalous process behavior, security feature bypass indicators, and suspicious Windows API usage patterns consistent with protection mechanism circumvention.
MITRE ATT&CK
YARA-L Detection Query
rule cve_2026_32202_windows_protection_bypass {
meta:
author = "df00tech Detection Engineering"
description = "Detects CVE-2026-32202 Microsoft Windows Protection Mechanism Failure exploitation"
severity = "HIGH"
priority = "HIGH"
cve = "CVE-2026-32202"
cwe = "CWE-693"
mitre_attack = "T1562, T1548, T1055"
reference = "https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32202"
events:
($process.metadata.event_type = "PROCESS_LAUNCH"
and (
re.regex($process.principal.process.file.full_path, `(?i)(cmd\.exe|powershell\.exe|wscript\.exe|cscript\.exe|mshta\.exe|rundll32\.exe|regsvr32\.exe)$`)
)
and not re.regex($process.principal.process.parent_process.file.full_path, `(?i)(explorer\.exe|svchost\.exe|services\.exe|msiexec\.exe)$`)
) or
(
re.regex($process.target.process.command_line, `(?i)(SeDebugPrivilege|AdjustTokenPrivileges|NtSetInformationToken|ZwSetInformationToken|BypassUAC|Set-MpPreference|DisableRealtimeMonitoring|DisableAntiSpyware)`)
) or
(
$process.metadata.event_type = "REGISTRY_MODIFICATION"
and re.regex($process.target.registry.registry_key, `(?i)(Windows.Defender|SecurityHealthService|WinDefend)`)
)
condition:
$process
}Chronicle YARA-L rule detecting Windows protection mechanism bypass behaviors associated with CVE-2026-32202 exploitation across process launch, command-line, and registry modification events.
Data Sources
Required Tables
False Positives & Tuning
- Authorized endpoint management platforms modifying Windows Defender registry keys
- Legitimate security tools spawning scripting engines for scanning or remediation purposes
- Software deployment pipelines using cmd.exe or PowerShell from non-standard parent contexts
- IT provisioning automation adjusting token privileges during workstation setup
Other platforms for CVE-2026-32202
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Disable Windows Defender Real-Time Protection via PowerShell
Expected signal: Windows Security Event 4688 (process create) for powershell.exe; Sysmon Event 1 with command line containing Set-MpPreference; possible Windows Defender Event 5001 (real-time protection disabled); registry modification under HKLM\SOFTWARE\Microsoft\Windows Defender
- Test 2Enable SeDebugPrivilege via Token Manipulation
Expected signal: Windows Security Event 4703 (token right adjusted) for SeDebugPrivilege; Sysmon Event 1 for powershell.exe process creation; PowerShell ScriptBlock log Event 4104 capturing the command
- Test 3Windows Defender Registry Key Tampering
Expected signal: Windows Security Event 4657 (registry value modified); Sysmon Events 12 and 13 (registry key create/value set) for HKLM\SOFTWARE\Policies\Microsoft\Windows Defender; Windows Security Center Event 5001
- Test 4Spawn Scripting Engine from Unusual Parent Process
Expected signal: Sysmon Event 1 showing cmd.exe with ParentImage=powershell.exe; Windows Security Event 4688 chain; command output in process creation logs
Unlock Pro Content
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