Detect Google Chromium V8 Type Confusion Exploitation (CVE-2025-13223) in Splunk
Detects exploitation attempts targeting CVE-2025-13223, a type confusion vulnerability (CWE-843) in Google Chromium's V8 JavaScript engine. This KEV-listed vulnerability allows remote attackers to execute arbitrary code via a crafted HTML page. Exploitation typically involves a malicious web page triggering memory corruption through confused object type handling in V8, leading to sandbox escape or remote code execution within the browser process.
MITRE ATT&CK
SPL Detection Query
index=endpoint sourcetype IN ("XmlWinEventLog:Microsoft-Windows-Sysmon/Operational", "crowdstrike:events:sensor", "sentinelone:alerts")
| eval parent_lower=lower(ParentImage)
| eval proc_lower=lower(Image)
| where match(parent_lower, "(chrome|msedge|brave)\.exe$")
AND match(proc_lower, "(cmd|powershell|wscript|cscript|mshta|rundll32|regsvr32|certutil|bitsadmin|wmic|msiexec)\.exe$")
| eval risk_score=case(
match(proc_lower, "(powershell|cmd)\.exe"), 90,
match(proc_lower, "(mshta|regsvr32|rundll32)\.exe"), 95,
true(), 70
)
| eval detection_context="CVE-2025-13223: Suspicious child process from Chromium V8 exploitation"
| table _time, host, user, ParentImage, ParentCommandLine, Image, CommandLine, ProcessId, ParentProcessId, risk_score, detection_context
| sort -risk_score, -_time
``` Alternative: crash dump indicator ```
index=endpoint sourcetype IN ("XmlWinEventLog:Microsoft-Windows-Sysmon/Operational")
EventCode=11
| eval target_lower=lower(TargetFilename)
| where match(target_lower, "(crashpad|crashdumps|crash-reports).*\.(dmp|crash)$")
| eval initiating_lower=lower(Image)
| where match(initiating_lower, "(chrome|msedge|brave)\.exe$")
| table _time, host, user, Image, TargetFilename
| eval detection_context="CVE-2025-13223: Browser crash dump — possible V8 exploit"Splunk query detecting suspicious process lineage from Chromium-based browsers and associated crash dump artifacts consistent with CVE-2025-13223 V8 type confusion exploitation and sandbox escape.
Data Sources
Required Sourcetypes
False Positives & Tuning
- Browser automation frameworks (Selenium, Playwright, Puppeteer) running in CI/CD environments that legitimately spawn shell processes
- Electron-based applications embedding Chromium which spawn system processes during normal operation
- Developer or QA environments where headless Chrome is used with intentional child process spawning
- Crash reporting agents triggering on legitimate browser instability unrelated to exploitation
Other platforms for CVE-2025-13223
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 V8 Sandbox Escape - Chrome Spawning cmd.exe
Expected signal: Sysmon EventID 1 (ProcessCreate) with ParentImage matching chrome.exe and Image matching cmd.exe; DeviceProcessEvents in MDE showing FileName=cmd.exe with InitiatingProcessFileName=chrome.exe
- Test 2Browser Process Network Beacon Simulation Post-Exploitation
Expected signal: Sysmon EventID 3 (NetworkConnect) with Image=powershell.exe, ParentImage=chrome.exe (or powershell spawned in context of test), DestinationIp=192.0.2.1, DestinationPort=4444; DeviceNetworkEvents with InitiatingProcessFileName=powershell.exe
- Test 3Chrome Crash Dump Generation - Exploitation Indicator Simulation
Expected signal: Sysmon EventID 11 (FileCreate) events for each .dmp file creation in the Crashpad reports directory; DeviceFileEvents with FileName ending in .dmp and FolderPath containing Crashpad
- Test 4Linux - Chromium Renderer Child Process Spawn Simulation
Expected signal: Linux audit log (auditd) or Sysdig/Falco events showing bash or sh spawned with ppid matching chromium-browser process; EDR telemetry (CrowdStrike Falcon for Linux, SentinelOne) recording process lineage
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