Cisco ASA - threat detection message fired

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Id	795edf2d-cf3e-45b5-8452-fe6c9e6a582e
Rulename	Cisco ASA - threat detection message fired
Description	Identifies when the Cisco ASA Threat Detection engine fired an alert based on malicious activity occurring on the network inicated by DeviceEventClassID 733101-733105 Resources: https://www.cisco.com/c/en/us/td/docs/security/asa/syslog/b_syslog/syslogs9.html Details on how to further troubleshoot/investigate: https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113685-asa-threat-detection.html
Severity	Medium
Tactics	Discovery Impact
Techniques	T1046 T1498
Required data connectors	CiscoAsaAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml
Version	1.0.3
Arm template	795edf2d-cf3e-45b5-8452-fe6c9e6a582e.json

KQL

CommonSecurityLog
| where isempty(CommunicationDirection)
| where DeviceEventClassID in ("733101","733102","733103","733104","733105")
| extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)

YAML

description: |
  'Identifies when the Cisco ASA Threat Detection engine fired an alert based on malicious activity occurring on the network inicated by DeviceEventClassID 733101-733105
  Resources: https://www.cisco.com/c/en/us/td/docs/security/asa/syslog/b_syslog/syslogs9.html
  Details on how to further troubleshoot/investigate: https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113685-asa-threat-detection.html'  
kind: Scheduled
tactics:
- Discovery
- Impact
requiredDataConnectors:
- connectorId: CiscoAsaAma
  dataTypes:
  - CommonSecurityLog
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoASA/Analytic Rules/CiscoASA-ThreatDetectionMessage.yaml
severity: Medium
name: Cisco ASA - threat detection message fired
triggerThreshold: 0
queryPeriod: 1h
query: |
  CommonSecurityLog
  | where isempty(CommunicationDirection)
  | where DeviceEventClassID in ("733101","733102","733103","733104","733105")
  | extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)  
relevantTechniques:
- T1046
- T1498
id: 795edf2d-cf3e-45b5-8452-fe6c9e6a582e
queryFrequency: 1h
status: Available
triggerOperator: gt
version: 1.0.3
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: DeviceName
    identifier: FullName
- entityType: IP
  fieldMappings:
  - columnName: SourceIP
    identifier: Address

ARM