Netskope - UnsanctionedRisky Cloud App Access Shadow IT

Back


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

status: Available
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
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  
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/NetskopeWebTx/Analytic Rules/NetskopeWebtx_Rule10.yaml
tactics:
- InitialAccess
- Exfiltration
triggerThreshold: 0
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: User
- entityType: CloudApplication
  fieldMappings:
  - identifier: Name
    columnName: RiskyApplication
requiredDataConnectors:
- connectorId: NetskopeWebTxConnector
  dataTypes:
  - NetskopeWebTransactions_CL
kind: Scheduled
relevantTechniques:
- T1199
- T1567
description: |
    Alerts when users access unsanctioned or risky cloud applications based on Cloud Confidence Level (CCL) and app tags. Detects Shadow IT usage.
name: Netskope - Unsanctioned/Risky Cloud App Access (Shadow IT)
version: 1.0.0
id: cdc01279-d6ea-41b1-a32d-49d726be95b8
severity: Medium

ARM