Detect CVE-2025-62215 Microsoft Windows Race Condition Exploitation in Splunk
Detects exploitation attempts of CVE-2025-62215, a race condition vulnerability (CWE-362) in Microsoft Windows. This KEV-listed vulnerability can be abused by attackers to gain elevated privileges or execute arbitrary code by winning a time-of-check to time-of-use (TOCTOU) race condition. Detection focuses on suspicious process creation patterns, handle manipulation, and abnormal thread timing indicative of race condition exploitation.
MITRE ATT&CK
- Tactic
- Privilege Escalation Execution
SPL Detection Query
index=wineventlog sourcetype=WinEventLog:Security EventCode IN (4688, 4689, 4656, 4663, 4670, 4672)
| eval is_sensitive_proc=if(match(Process_Name, "(?i)(svchost|lsass|winlogon|services|wininit)\.exe"), 1, 0)
| eval has_dangerous_priv=if(match(Privilege_List, "SeDebugPrivilege|SeTcbPrivilege|SeCreateTokenPrivilege"), 1, 0)
| eval event_ts=strptime(_time, "%s")
| sort 0 Account_Name, Computer, _time
| streamstats window=20 count AS burst_count, range(_time) AS time_range_sec by Account_Name, Computer
| where burst_count > 5 AND time_range_sec < 30
| where is_sensitive_proc=1 OR has_dangerous_priv=1
| stats count AS total_events,
values(EventCode) AS event_codes,
values(Process_Name) AS processes,
values(Privilege_List) AS privileges,
min(_time) AS first_seen,
max(_time) AS last_seen,
max(burst_count) AS max_burst
by Account_Name, Computer
| eval duration_sec=last_seen - first_seen
| where max_burst > 5 AND duration_sec < 60
| eval severity=case(max_burst > 15, "critical", max_burst > 8, "high", "medium")
| table first_seen, last_seen, Computer, Account_Name, processes, event_codes, privileges, max_burst, duration_sec, severity
| sort - max_burstDetects burst sequences of Windows security events involving sensitive processes and dangerous privilege assignments within short time windows, indicative of race condition exploitation attempts for CVE-2025-62215.
Data Sources
Required Sourcetypes
False Positives & Tuning
- Legitimate privileged software installers triggering multiple security events in rapid succession
- Enterprise IT management tools such as SCCM or Intune performing system-level operations
- Security testing tools or vulnerability scanners running in authorized engagements
- Windows update processes that legitimately spawn sensitive system processes with elevated privileges
Other platforms for CVE-2025-62215
Testing Methodology
Validate this detection against 3 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 Rapid Handle Acquisition on System Process
Expected signal: Windows Security Event Log entries for EventID 4656 (A handle to an object was requested) and 4658 (The handle to an object was closed) appearing in rapid succession for the svchost process, triggering the burst detection threshold.
- Test 2Privilege Escalation Sequence Simulation
Expected signal: EventID 4688 (process creation) followed by EventID 4672 (special privileges assigned to new logon) within seconds, generating the correlated alert pattern.
- Test 3CreateRemoteThread into System Process (Lab Only)
Expected signal: CrowdStrike CreateRemoteThreadV2 event and Windows EventID 4656 for the target process handle, followed by potential Microsoft Defender ATP alert for suspicious cross-process thread creation.
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