Detect CVE-2023-36424 - Microsoft Windows Out-of-Bounds Read Exploitation in Sumo Logic CSE
Detects exploitation attempts of CVE-2023-36424, a Microsoft Windows out-of-bounds read vulnerability (CWE-125) listed in CISA's Known Exploited Vulnerabilities catalog. Out-of-bounds read vulnerabilities in Windows kernel or system components can be leveraged for privilege escalation, information disclosure, or as a stepping stone in exploit chains. This detection monitors for anomalous process behavior, crash artifacts, and privilege escalation patterns consistent with exploitation of this class of vulnerability.
MITRE ATT&CK
Sumo Detection Query
_sourceCategory=Windows/Security OR _sourceCategory=Windows/Sysmon
| where _sourceCategory matches "Windows*"
| json auto
| where %"EventID" in ("4688", "4672", "1000", "1001") or %"Event.System.EventID" in ("4688", "4672", "1000", "1001")
| where !matches(%"SubjectUserName", "*$") or !matches(%"User", "*$")
| where %"NewProcessName" matches "*werfault*" or %"Image" matches "*werfault*" or %"EventID" == "4672"
| eval cve = "CVE-2023-36424"
| eval risk = if(%"EventID" == "4672", "privilege_escalation", if(%"NewProcessName" matches "*werfault*", "crash_artifact", "unknown"))
| stats count as hit_count, values(%"Computer") as computers, values(%"SubjectUserName") as users by %"EventID", risk, cve
| where hit_count > 0
| sort by hit_count descSumo Logic query detecting CVE-2023-36424 exploitation indicators from Windows Security and Sysmon sources, categorizing events by risk type and grouping by event ID for analyst review.
Data Sources
Required Tables
False Positives & Tuning
- WerFault.exe invocations from legitimate application instability unrelated to exploitation
- Standard privileged user logons generating 4672 events on servers with many admins
- Monitoring or backup software triggering crash reports as a side effect of deep system access
- New software deployments that cause temporary crashes during installation phases
Other platforms for CVE-2023-36424
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 1Simulate Out-of-Bounds Read Crash via Malformed Input
Expected signal: Windows Event ID 1000 (Application Error) and 1001 (WER) in Application log; WerFault.exe process launch visible in Sysmon Event ID 1; crash dump file created in %LOCALAPPDATA%\CrashDumps
- Test 2Privilege Escalation Simulation Following Crash Artifact
Expected signal: Windows Event ID 4672 (Special Privileges Assigned) in Security log; Process creation events in Sysmon for cmd.exe and powershell.exe; elevated process token in DeviceProcessEvents
- Test 3Memory Dump Creation Mimicking Exploit Artifact
Expected signal: Sysmon Event ID 11 (FileCreate) for .dmp file in CrashDumps directory; DeviceFileEvents entry for the dump file creation; rundll32.exe process creation with comsvcs.dll MiniDump arguments in process telemetry
- Test 4WerFault.exe Manual Invocation Simulation
Expected signal: Sysmon Event ID 1 showing WerFault.exe launched by PowerShell (non-standard parent); DeviceProcessEvents with FileName=werfault.exe and InitiatingProcessFileName=powershell.exe; potential Event ID 1001 in Application log
Unlock Pro Content
Get the full detection package for CVE-2023-36424 including response playbook, investigation guide, and atomic red team tests.