Netskope - UnsanctionedRisky Cloud App Access Shadow IT

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Id	cdc01279-d6ea-41b1-a32d-49d726be95b8
Rulename	Netskope - Unsanctioned/Risky Cloud App Access (Shadow IT)
Description	Alerts when users access unsanctioned or risky cloud applications based on Cloud Confidence Level (CCL) and app tags. Detects Shadow IT usage.
Severity	Medium
Tactics	InitialAccess Exfiltration
Techniques	T1199 T1567
Required data connectors	NetskopeWebTxConnector
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/NetskopeWebTx/Analytic Rules/NetskopeWebtx_Rule10.yaml
Version	1.0.0
Arm template	cdc01279-d6ea-41b1-a32d-49d726be95b8.json

KQL

NetskopeWebTransactions_CL
| where TimeGenerated > ago(1h)
| where isnotempty(CsUsername) and isnotempty(XCsApp)
| where XCsAppTags contains 'Unsanctioned' 
    or XCsAppCcl =~ 'poor'
    or XCsAppCcl =~ 'low'
    or XCsAppCci < 50
| summarize 
    EventCount = count(),
    TotalBytesMB = round(sum(Bytes) / 1048576.0, 2),
    Activities = make_set(XCsAppActivity),
    FirstSeen = min(TimeGenerated),
    LastSeen = max(TimeGenerated)
    by 
    CsUsername,
    XCsApp,
    XCsAppCategory,
    XCsAppCcl,
    XCsAppCci,
    XCsAppTags,
    XCCountry,
    XCDevice
| extend RiskLevel = case(
    XCsAppCci < 30, 'Critical',
    XCsAppCci < 50, 'High',
    XCsAppCci < 70, 'Medium',
    'Low')
| project 
    TimeGenerated = LastSeen,
    User = CsUsername,
    RiskyApplication = XCsApp,
    AppCategory = XCsAppCategory,
    CloudConfidenceLevel = XCsAppCcl,
    CloudConfidenceIndex = XCsAppCci,
    AppTags = XCsAppTags,
    RiskLevel,
    Country = XCCountry,
    Device = XCDevice,
    Activities,
    EventCount,
    DataTransferMB = TotalBytesMB

YAML

id: cdc01279-d6ea-41b1-a32d-49d726be95b8
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/NetskopeWebTx/Analytic Rules/NetskopeWebtx_Rule10.yaml
entityMappings:
- fieldMappings:
  - identifier: Name
    columnName: User
  entityType: Account
- fieldMappings:
  - identifier: Name
    columnName: RiskyApplication
  entityType: CloudApplication
requiredDataConnectors:
- dataTypes:
  - NetskopeWebTransactions_CL
  connectorId: NetskopeWebTxConnector
queryFrequency: 1h
queryPeriod: 1h
status: Available
query: |
  NetskopeWebTransactions_CL
  | where TimeGenerated > ago(1h)
  | where isnotempty(CsUsername) and isnotempty(XCsApp)
  | where XCsAppTags contains 'Unsanctioned' 
      or XCsAppCcl =~ 'poor'
      or XCsAppCcl =~ 'low'
      or XCsAppCci < 50
  | summarize 
      EventCount = count(),
      TotalBytesMB = round(sum(Bytes) / 1048576.0, 2),
      Activities = make_set(XCsAppActivity),
      FirstSeen = min(TimeGenerated),
      LastSeen = max(TimeGenerated)
      by 
      CsUsername,
      XCsApp,
      XCsAppCategory,
      XCsAppCcl,
      XCsAppCci,
      XCsAppTags,
      XCCountry,
      XCDevice
  | extend RiskLevel = case(
      XCsAppCci < 30, 'Critical',
      XCsAppCci < 50, 'High',
      XCsAppCci < 70, 'Medium',
      'Low')
  | project 
      TimeGenerated = LastSeen,
      User = CsUsername,
      RiskyApplication = XCsApp,
      AppCategory = XCsAppCategory,
      CloudConfidenceLevel = XCsAppCcl,
      CloudConfidenceIndex = XCsAppCci,
      AppTags = XCsAppTags,
      RiskLevel,
      Country = XCCountry,
      Device = XCDevice,
      Activities,
      EventCount,
      DataTransferMB = TotalBytesMB  
name: Netskope - Unsanctioned/Risky Cloud App Access (Shadow IT)
kind: Scheduled
tactics:
- InitialAccess
- Exfiltration
severity: Medium
relevantTechniques:
- T1199
- T1567
triggerThreshold: 0
version: 1.0.0
description: |
    Alerts when users access unsanctioned or risky cloud applications based on Cloud Confidence Level (CCL) and app tags. Detects Shadow IT usage.

ARM