7009 System log · Service Control Manager low severity low volume

System Event ID 7009 — A timeout was reached while waiting for service to connect

A service failed to connect within the allowed time.

Why event 7009 matters

Timeout of security monitoring services may indicate resource exhaustion attack (filling disk/memory to crash agents) or service tampering.

How to detect it

Alert: timeout of security-critical services. Investigate resource usage on affected systems.

Log source
System
Logged by default in the System channel; no audit policy required.
Fields to pivot on
param1param2Computer

Detection queries

Starting points — adapt the log source, projected fields and thresholds for your environment.

Sentinel / Defender KQL
Event
| where EventLog == "System" and EventID == 7009   // A timeout was reached while waiting for service to connect
// EventData holds: param1, param2, Computer
| project TimeGenerated, Computer, RenderedDescription
| sort by TimeGenerated desc
Splunk SPL
index=* sourcetype="WinEventLog:System" EventCode=7009
| stats count earliest(_time) as first_seen latest(_time) as last_seen by ComputerName
| sort - count   `# A timeout was reached while waiting for service to connect — add EventData fields: param1, param2, Computer`
Hunt event 7009 in Sentinel/Defender →
Build a KQL query for this event in the KQL Query Builder.
Search all event IDs →
Open the interactive Windows Event ID lookup.

Related Service Control Manager events

7000 The service failed to start due to the following error 7001 The service depends on another service 7022 The service hung on starting 7023 The service terminated with an error 7024 The service terminated with a service-specific error 7026 The following boot-start or system-start driver failed to load 7031 The service terminated unexpectedly 7034 The service terminated unexpectedly and will be restarted 7035 The service was successfully sent a start or stop control 7036 The service entered the stopped/running state 7038 The service was unable to log on as the configured account 7040 The start type of a service was changed

Frequently asked questions

What is System Event ID 7009?

A timeout was reached while waiting for service to connect. A service failed to connect within the allowed time.

Which log records event 7009?

Event 7009 is written to the System channel by Service Control Manager / Kernel. Logged by default in the System channel; no audit policy required.

How do you detect activity around event 7009?

Alert: timeout of security-critical services. Investigate resource usage on affected systems.