Netskope - Data Movement Tracking UploadDownload Monitoring

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Id	cf103180-cb81-4796-921d-3cc7eef4e817
Rulename	Netskope - Data Movement Tracking (Upload/Download Monitoring)
Description	Tracks file uploads and downloads, monitoring data movement direction, size, and destination. Provides visibility into data flow patterns.
Severity	Informational
Tactics	Exfiltration Collection
Techniques	T1567 T1074
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_Rule2.yaml
Version	1.0.0
Arm template	cf103180-cb81-4796-921d-3cc7eef4e817.json

KQL

let significantSizeMB = 50;
NetskopeWebTransactions_CL
| where TimeGenerated > ago(1h)
| where isnotempty(CsUsername)
| where CsBytes > 0 or ScBytes > 0 or XRsFileSize > 0
| extend 
    Direction = case(
        CsBytes > ScBytes, 'Upload',
        ScBytes > CsBytes, 'Download',
        'Unknown'),
    TransferSize = max_of(CsBytes, ScBytes, XRsFileSize)
| summarize 
    TotalUploadBytes = sumif(CsBytes, Direction == 'Upload'),
    TotalDownloadBytes = sumif(ScBytes, Direction == 'Download'),
    UploadCount = countif(Direction == 'Upload'),
    DownloadCount = countif(Direction == 'Download'),
    UniqueFiles = dcount(XCsAppObjectName),
    Files = make_set(XCsAppObjectName, 20),
    FileTypes = make_set(XRsFileType),
    Apps = make_set(XCsApp),
    Destinations = make_set(CsHost, 20)
    by CsUsername, XCDevice, XCCountry, bin(TimeGenerated, 1h)
| extend 
    TotalUploadMB = round(TotalUploadBytes / 1048576.0, 2),
    TotalDownloadMB = round(TotalDownloadBytes / 1048576.0, 2),
    TotalTransferMB = round((TotalUploadBytes + TotalDownloadBytes) / 1048576.0, 2)
| where TotalTransferMB > significantSizeMB
| extend DataFlowSummary = strcat('Upload: ', TotalUploadMB, ' MB (', UploadCount, ' ops), Download: ', TotalDownloadMB, ' MB (', DownloadCount, ' ops)')
| project 
    TimeGenerated,
    User = CsUsername,
    Device = XCDevice,
    Country = XCCountry,
    TotalUploadMB,
    TotalDownloadMB,
    TotalTransferMB,
    UploadOperations = UploadCount,
    DownloadOperations = DownloadCount,
    UniqueFiles,
    FilesSample = Files,
    FileTypes,
    Applications = Apps,
    Destinations,
    DataFlowSummary

YAML

description: |
    Tracks file uploads and downloads, monitoring data movement direction, size, and destination. Provides visibility into data flow patterns.
status: Available
tactics:
- Exfiltration
- Collection
triggerOperator: gt
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/NetskopeWebTx/Analytic Rules/NetskopeWebtx_Rule2.yaml
id: cf103180-cb81-4796-921d-3cc7eef4e817
version: 1.0.0
requiredDataConnectors:
- dataTypes:
  - NetskopeWebTransactions_CL
  connectorId: NetskopeWebTxConnector
triggerThreshold: 0
queryPeriod: 1h
query: |
  let significantSizeMB = 50;
  NetskopeWebTransactions_CL
  | where TimeGenerated > ago(1h)
  | where isnotempty(CsUsername)
  | where CsBytes > 0 or ScBytes > 0 or XRsFileSize > 0
  | extend 
      Direction = case(
          CsBytes > ScBytes, 'Upload',
          ScBytes > CsBytes, 'Download',
          'Unknown'),
      TransferSize = max_of(CsBytes, ScBytes, XRsFileSize)
  | summarize 
      TotalUploadBytes = sumif(CsBytes, Direction == 'Upload'),
      TotalDownloadBytes = sumif(ScBytes, Direction == 'Download'),
      UploadCount = countif(Direction == 'Upload'),
      DownloadCount = countif(Direction == 'Download'),
      UniqueFiles = dcount(XCsAppObjectName),
      Files = make_set(XCsAppObjectName, 20),
      FileTypes = make_set(XRsFileType),
      Apps = make_set(XCsApp),
      Destinations = make_set(CsHost, 20)
      by CsUsername, XCDevice, XCCountry, bin(TimeGenerated, 1h)
  | extend 
      TotalUploadMB = round(TotalUploadBytes / 1048576.0, 2),
      TotalDownloadMB = round(TotalDownloadBytes / 1048576.0, 2),
      TotalTransferMB = round((TotalUploadBytes + TotalDownloadBytes) / 1048576.0, 2)
  | where TotalTransferMB > significantSizeMB
  | extend DataFlowSummary = strcat('Upload: ', TotalUploadMB, ' MB (', UploadCount, ' ops), Download: ', TotalDownloadMB, ' MB (', DownloadCount, ' ops)')
  | project 
      TimeGenerated,
      User = CsUsername,
      Device = XCDevice,
      Country = XCCountry,
      TotalUploadMB,
      TotalDownloadMB,
      TotalTransferMB,
      UploadOperations = UploadCount,
      DownloadOperations = DownloadCount,
      UniqueFiles,
      FilesSample = Files,
      FileTypes,
      Applications = Apps,
      Destinations,
      DataFlowSummary  
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: User
relevantTechniques:
- T1567
- T1074
name: Netskope - Data Movement Tracking (Upload/Download Monitoring)
severity: Informational
kind: Scheduled

ARM