Several deny actions registered

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Id	f8dad4e9-3f19-4d70-ab7f-8f19ccd43a3e
Rulename	Several deny actions registered
Description	Identifies attack pattern when attacker tries to move, or scan, from resource to resource on the network and creates an incident when a source has more than 1 registered deny action in Azure Firewall.
Severity	Medium
Tactics	Discovery LateralMovement CommandAndControl
Techniques	T1046 T1071 T1210
Required data connectors	AzureFirewall
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	1
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Firewall/Analytic Rules/SeveralDenyActionsRegistered.yaml
Version	1.1.1
Arm template	f8dad4e9-3f19-4d70-ab7f-8f19ccd43a3e.json

KQL

let threshold = 1;
union isfuzzy=true(
AZFWApplicationRule
| where Action == "Deny"
| summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
| where count_ >= ["threshold"]),
(AZFWNetworkRule
| where Action == "Deny"
| extend Fqdn = DestinationIp
| summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
| where count_ >= ["threshold"]),
(AZFWFlowTrace
| where Action == "Deny"
| extend Fqdn = DestinationIp
| summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
| where count_ >= ["threshold"]),
(AZFWIdpsSignature
| where Action == "Deny"
| extend Fqdn = DestinationIp
| summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
| where count_ >= ["threshold"]),
(AzureDiagnostics
| where OperationName in ("AzureFirewallApplicationRuleLog","AzureFirewallNetworkRuleLog")
| extend msg_s_replaced0 = replace(@"\s\s",@" ",msg_s)
| extend msg_s_replaced1 = replace(@"\.\s",@" ",msg_s_replaced0)
| extend msg_a = split(msg_s_replaced1," ")
| extend srcAddr_a = split(msg_a[3],":") , destAddr_a = split(msg_a[5],":")
| extend Protocol = tostring(msg_a[0]), SourceIp = tostring(srcAddr_a[0]), srcPort = tostring(srcAddr_a[1]), DestinationIp = tostring(destAddr_a[0]), destPort = tostring(destAddr_a[1]), Action = tostring(msg_a[7])
| where Action == "Deny"
| extend Fqdn = iff(DestinationIp matches regex "\\d+\\.\\d+\\.\\d+\\.\\d+","",DestinationIp)
| summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
| where count_ >= ["threshold"])

YAML

relevantTechniques:
- T1046
- T1071
- T1210
queryFrequency: 1h
description: |
    'Identifies attack pattern when attacker tries to move, or scan, from resource to resource on the network and creates an incident when a source has more than 1 registered deny action in Azure Firewall.'
severity: Medium
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: SourceIp
  entityType: IP
- fieldMappings:
  - identifier: Url
    columnName: Fqdn
  entityType: URL
triggerThreshold: 1
tactics:
- Discovery
- LateralMovement
- CommandAndControl
requiredDataConnectors:
- dataTypes:
  - AzureDiagnostics
  - AZFWApplicationRule
  - AZFWNetworkRule
  - AZFWFlowTrace
  - AZFWIdpsSignature
  connectorId: AzureFirewall
queryPeriod: 1h
id: f8dad4e9-3f19-4d70-ab7f-8f19ccd43a3e
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Firewall/Analytic Rules/SeveralDenyActionsRegistered.yaml
query: |
  let threshold = 1;
  union isfuzzy=true(
  AZFWApplicationRule
  | where Action == "Deny"
  | summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
  | where count_ >= ["threshold"]),
  (AZFWNetworkRule
  | where Action == "Deny"
  | extend Fqdn = DestinationIp
  | summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
  | where count_ >= ["threshold"]),
  (AZFWFlowTrace
  | where Action == "Deny"
  | extend Fqdn = DestinationIp
  | summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
  | where count_ >= ["threshold"]),
  (AZFWIdpsSignature
  | where Action == "Deny"
  | extend Fqdn = DestinationIp
  | summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
  | where count_ >= ["threshold"]),
  (AzureDiagnostics
  | where OperationName in ("AzureFirewallApplicationRuleLog","AzureFirewallNetworkRuleLog")
  | extend msg_s_replaced0 = replace(@"\s\s",@" ",msg_s)
  | extend msg_s_replaced1 = replace(@"\.\s",@" ",msg_s_replaced0)
  | extend msg_a = split(msg_s_replaced1," ")
  | extend srcAddr_a = split(msg_a[3],":") , destAddr_a = split(msg_a[5],":")
  | extend Protocol = tostring(msg_a[0]), SourceIp = tostring(srcAddr_a[0]), srcPort = tostring(srcAddr_a[1]), DestinationIp = tostring(destAddr_a[0]), destPort = tostring(destAddr_a[1]), Action = tostring(msg_a[7])
  | where Action == "Deny"
  | extend Fqdn = iff(DestinationIp matches regex "\\d+\\.\\d+\\.\\d+\\.\\d+","",DestinationIp)
  | summarize StartTime = min(TimeGenerated), count() by SourceIp, Fqdn, Action, Protocol
  | where count_ >= ["threshold"])  
name: Several deny actions registered
version: 1.1.1
kind: Scheduled
status: Available

ARM