NRT Sensitive Azure Key Vault operations

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Id	884ead54-cb3f-4676-a1eb-b26532d6cbfd
Rulename	NRT Sensitive Azure Key Vault operations
Description	Identifies when sensitive Azure Key Vault operations are used. This includes: VaultDelete, KeyDelete, SecretDelete, SecretPurge, KeyPurge, SecretBackup, KeyBackup. Any Backup operations should match with expected scheduled backup activity.
Severity	Low
Tactics	Impact
Techniques	T1485
Required data connectors	AzureKeyVault
Kind	NRT
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Key Vault/Analytic Rules/NRT_KeyVaultSensitiveOperations.yaml
Version	1.0.2
Arm template	884ead54-cb3f-4676-a1eb-b26532d6cbfd.json

KQL

let SensitiveOperationList = dynamic(
["VaultDelete", "KeyDelete", "SecretDelete", "SecretPurge", "KeyPurge", "SecretBackup", "KeyBackup"]);
AzureDiagnostics
| extend ResultType = column_ifexists("ResultType", "NoResultType"), 
requestUri_s = column_ifexists("requestUri_s", "None"), 
identity_claim_oid_g = column_ifexists("identity_claim_oid_g", "None"), CallerIPAddress = column_ifexists("CallerIPAddress", "None"), 
clientInfo_s = column_ifexists("clientInfo_s", "None"), 
identity_claim_upn_s = column_ifexists("identity_claim_upn_s", "None"),
identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g = column_ifexists("identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g", "None")
| where ResourceType =~ "VAULTS" and ResultType =~ "Success"
| where OperationName in~ (SensitiveOperationList)
| summarize EventCount=count(), StartTimeUtc=min(TimeGenerated), EndTimeUtc=max(TimeGenerated), TimeTriggered=make_list(TimeGenerated),OperationNameList=make_set(OperationName), RequestURLList=make_set(requestUri_s), CallerIPList = make_set(CallerIPAddress),  CallerIPMax= arg_max(CallerIPAddress,*) by ResourceType, ResultType, Resource, identity_claim_upn_s, clientInfo_s, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g
| extend timestamp = StartTimeUtc
| extend Name = tostring(split(identity_claim_upn_s,'@',0)[0]), UPNSuffix = tostring(split(identity_claim_upn_s,'@',1)[0]), AadUserId = identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g

YAML

requiredDataConnectors:
- connectorId: AzureKeyVault
  dataTypes:
  - KeyVaultData
status: Available
id: 884ead54-cb3f-4676-a1eb-b26532d6cbfd
tactics:
- Impact
entityMappings:
- fieldMappings:
  - columnName: AadUserId
    identifier: AadUserId
  - columnName: Name
    identifier: Name
  - columnName: UPNSuffix
    identifier: UPNSuffix
  entityType: Account
- fieldMappings:
  - columnName: CallerIPMax
    identifier: Address
  entityType: IP
version: 1.0.2
query: |
  let SensitiveOperationList = dynamic(
  ["VaultDelete", "KeyDelete", "SecretDelete", "SecretPurge", "KeyPurge", "SecretBackup", "KeyBackup"]);
  AzureDiagnostics
  | extend ResultType = column_ifexists("ResultType", "NoResultType"), 
  requestUri_s = column_ifexists("requestUri_s", "None"), 
  identity_claim_oid_g = column_ifexists("identity_claim_oid_g", "None"), CallerIPAddress = column_ifexists("CallerIPAddress", "None"), 
  clientInfo_s = column_ifexists("clientInfo_s", "None"), 
  identity_claim_upn_s = column_ifexists("identity_claim_upn_s", "None"),
  identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g = column_ifexists("identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g", "None")
  | where ResourceType =~ "VAULTS" and ResultType =~ "Success"
  | where OperationName in~ (SensitiveOperationList)
  | summarize EventCount=count(), StartTimeUtc=min(TimeGenerated), EndTimeUtc=max(TimeGenerated), TimeTriggered=make_list(TimeGenerated),OperationNameList=make_set(OperationName), RequestURLList=make_set(requestUri_s), CallerIPList = make_set(CallerIPAddress),  CallerIPMax= arg_max(CallerIPAddress,*) by ResourceType, ResultType, Resource, identity_claim_upn_s, clientInfo_s, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g
  | extend timestamp = StartTimeUtc
  | extend Name = tostring(split(identity_claim_upn_s,'@',0)[0]), UPNSuffix = tostring(split(identity_claim_upn_s,'@',1)[0]), AadUserId = identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g   
description: |
  'Identifies when sensitive Azure Key Vault operations are used. This includes: VaultDelete, KeyDelete, SecretDelete, SecretPurge, KeyPurge, SecretBackup, KeyBackup.
  Any Backup operations should match with expected scheduled backup activity.'  
relevantTechniques:
- T1485
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Key Vault/Analytic Rules/NRT_KeyVaultSensitiveOperations.yaml
name: NRT Sensitive Azure Key Vault operations
severity: Low
kind: NRT

ARM