let threshold = 10;
VMwareESXi
| where SyslogMessage has_all ('Temp directory', 'free space')
| extend sp = toreal(extract(@'free space is:\s(\d+)', 1, SyslogMessage)) / 1000000000
| where sp < threshold
| extend h = 'Hypervisor'
| extend HostCustomEntity = h
description: |
'This rule is triggered when temp directory space is detected.'
kind: Scheduled
tactics:
- Impact
requiredDataConnectors:
- connectorId: SyslogAma
datatypes:
- Syslog
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic Rules/ESXiLowTempDirSpace.yaml
severity: Medium
name: VMware ESXi - Low temp directory space
triggerThreshold: 0
queryPeriod: 1h
query: |
let threshold = 10;
VMwareESXi
| where SyslogMessage has_all ('Temp directory', 'free space')
| extend sp = toreal(extract(@'free space is:\s(\d+)', 1, SyslogMessage)) / 1000000000
| where sp < threshold
| extend h = 'Hypervisor'
| extend HostCustomEntity = h
relevantTechniques:
- T1529
id: 2ee727f7-b7c2-4034-b6c9-d245d5a29343
queryFrequency: 1h
status: Available
triggerOperator: gt
version: 1.0.2
entityMappings:
- entityType: Host
fieldMappings:
- columnName: HostCustomEntity
identifier: FullName
