Whisper Security - BGP Route Anomaly with Traffic Spike

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Id	1c08a7cb-7ff4-5a37-a961-39c29f8d07bd
Rulename	Whisper Security - BGP Route Anomaly with Traffic Spike
Description	Detects BGP origin AS changes for IP prefixes correlated with network traffic volume spikes. May indicate BGP hijacking or adversary-in-the-middle attacks.
Severity	High
Tactics	Collection
Techniques	T1557
Required data connectors	WhisperSecurityConnector
Kind	Scheduled
Query frequency	15m
Query period	1d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Whisper/Analytic%20Rules/BgpRouteAnomalyTrafficSpike.yaml
Version	1.0.0
Arm template	1c08a7cb-7ff4-5a37-a961-39c29f8d07bd.json

KQL

// MITRE ATT&CK: T1557 - Adversary-in-the-Middle
// Tactic: Collection
// Detects BGP route origin changes correlated with traffic volume anomalies
let lookbackPeriod = 1d;
let bgpChanges = WhisperHistory_CL
    | where TimeGenerated > ago(lookbackPeriod)
    | where isnotempty(bgpOrigin)
    | serialize
    | extend PreviousOrigin = prev(bgpOrigin), PreviousIndicator = prev(indicator)
    | where indicator == PreviousIndicator
    | where bgpOrigin != PreviousOrigin
    | where isnotempty(PreviousOrigin)
    | project indicator, bgpPrefix, OldOrigin = PreviousOrigin, NewOrigin = bgpOrigin, ChangeTime = snapshotDate;
let CommonSecurityLogSafe = union isfuzzy=true CommonSecurityLog, (datatable(TimeGenerated:datetime, DestinationIP:string, SentBytes:long, ReceivedBytes:long)[]);
let trafficBaseline = CommonSecurityLogSafe
    | where TimeGenerated > ago(lookbackPeriod)
    | where isnotempty(DestinationIP)
    | summarize BaselineBytes = avg(SentBytes + ReceivedBytes), BaselineCount = count() by DestinationIP, bin(TimeGenerated, 1h)
    | summarize AvgBaselineBytes = avg(BaselineBytes), AvgBaselineCount = avg(BaselineCount) by DestinationIP;
let recentTraffic = CommonSecurityLogSafe
    | where TimeGenerated > ago(15m)
    | where isnotempty(DestinationIP)
    | summarize RecentBytes = sum(SentBytes + ReceivedBytes), RecentCount = count() by DestinationIP;
recentTraffic
    | join kind=inner (trafficBaseline) on DestinationIP
    | where RecentBytes > AvgBaselineBytes * 3 or RecentCount > AvgBaselineCount * 3
    | extend TrafficChange = iff(AvgBaselineBytes > 0, round((RecentBytes - AvgBaselineBytes) / AvgBaselineBytes * 100, 2), 0.0)
    | join kind=inner (bgpChanges) on $left.DestinationIP == $right.indicator
    | project TimeGenerated = ChangeTime, IPAddress = DestinationIP, Prefix = bgpPrefix, OriginASN = NewOrigin, OldOriginASN = OldOrigin, TrafficChange, RecentBytes, AvgBaselineBytes

YAML

incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: true
  createIncident: true
name: Whisper Security - BGP Route Anomaly with Traffic Spike
triggerOperator: gt
query: |
  // MITRE ATT&CK: T1557 - Adversary-in-the-Middle
  // Tactic: Collection
  // Detects BGP route origin changes correlated with traffic volume anomalies
  let lookbackPeriod = 1d;
  let bgpChanges = WhisperHistory_CL
      | where TimeGenerated > ago(lookbackPeriod)
      | where isnotempty(bgpOrigin)
      | serialize
      | extend PreviousOrigin = prev(bgpOrigin), PreviousIndicator = prev(indicator)
      | where indicator == PreviousIndicator
      | where bgpOrigin != PreviousOrigin
      | where isnotempty(PreviousOrigin)
      | project indicator, bgpPrefix, OldOrigin = PreviousOrigin, NewOrigin = bgpOrigin, ChangeTime = snapshotDate;
  let CommonSecurityLogSafe = union isfuzzy=true CommonSecurityLog, (datatable(TimeGenerated:datetime, DestinationIP:string, SentBytes:long, ReceivedBytes:long)[]);
  let trafficBaseline = CommonSecurityLogSafe
      | where TimeGenerated > ago(lookbackPeriod)
      | where isnotempty(DestinationIP)
      | summarize BaselineBytes = avg(SentBytes + ReceivedBytes), BaselineCount = count() by DestinationIP, bin(TimeGenerated, 1h)
      | summarize AvgBaselineBytes = avg(BaselineBytes), AvgBaselineCount = avg(BaselineCount) by DestinationIP;
  let recentTraffic = CommonSecurityLogSafe
      | where TimeGenerated > ago(15m)
      | where isnotempty(DestinationIP)
      | summarize RecentBytes = sum(SentBytes + ReceivedBytes), RecentCount = count() by DestinationIP;
  recentTraffic
      | join kind=inner (trafficBaseline) on DestinationIP
      | where RecentBytes > AvgBaselineBytes * 3 or RecentCount > AvgBaselineCount * 3
      | extend TrafficChange = iff(AvgBaselineBytes > 0, round((RecentBytes - AvgBaselineBytes) / AvgBaselineBytes * 100, 2), 0.0)
      | join kind=inner (bgpChanges) on $left.DestinationIP == $right.indicator
      | project TimeGenerated = ChangeTime, IPAddress = DestinationIP, Prefix = bgpPrefix, OriginASN = NewOrigin, OldOriginASN = OldOrigin, TrafficChange, RecentBytes, AvgBaselineBytes
queryFrequency: 15m
description: |
  Detects BGP origin AS changes for IP prefixes correlated with network traffic volume spikes. May indicate BGP hijacking or adversary-in-the-middle attacks.
id: 1c08a7cb-7ff4-5a37-a961-39c29f8d07bd
triggerThreshold: 0
queryPeriod: 1d
version: 1.0.0
kind: Scheduled
customDetails:
  TrafficChange: TrafficChange
  OriginASN: OriginASN
  Prefix: Prefix
status: Available
severity: High
requiredDataConnectors:
- connectorId: WhisperSecurityConnector
  dataTypes:
  - WhisperHistory_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Whisper/Analytic%20Rules/BgpRouteAnomalyTrafficSpike.yaml
relevantTechniques:
- T1557
tactics:
- Collection
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: IPAddress
  entityType: IP

ARM

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/1c08a7cb-7ff4-5a37-a961-39c29f8d07bd')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1c08a7cb-7ff4-5a37-a961-39c29f8d07bd')]",
      "properties": {
        "alertRuleTemplateName": "1c08a7cb-7ff4-5a37-a961-39c29f8d07bd",
        "customDetails": {
          "OriginASN": "OriginASN",
          "Prefix": "Prefix",
          "TrafficChange": "TrafficChange"
        },
        "description": "Detects BGP origin AS changes for IP prefixes correlated with network traffic volume spikes. May indicate BGP hijacking or adversary-in-the-middle attacks.\n",
        "displayName": "Whisper Security - BGP Route Anomaly with Traffic Spike",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPAddress",
                "identifier": "Address"
              }
            ]
          }
        ],
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Whisper/Analytic%20Rules/BgpRouteAnomalyTrafficSpike.yaml",
        "query": "// MITRE ATT&CK: T1557 - Adversary-in-the-Middle\n// Tactic: Collection\n// Detects BGP route origin changes correlated with traffic volume anomalies\nlet lookbackPeriod = 1d;\nlet bgpChanges = WhisperHistory_CL\n    | where TimeGenerated > ago(lookbackPeriod)\n    | where isnotempty(bgpOrigin)\n    | serialize\n    | extend PreviousOrigin = prev(bgpOrigin), PreviousIndicator = prev(indicator)\n    | where indicator == PreviousIndicator\n    | where bgpOrigin != PreviousOrigin\n    | where isnotempty(PreviousOrigin)\n    | project indicator, bgpPrefix, OldOrigin = PreviousOrigin, NewOrigin = bgpOrigin, ChangeTime = snapshotDate;\nlet CommonSecurityLogSafe = union isfuzzy=true CommonSecurityLog, (datatable(TimeGenerated:datetime, DestinationIP:string, SentBytes:long, ReceivedBytes:long)[]);\nlet trafficBaseline = CommonSecurityLogSafe\n    | where TimeGenerated > ago(lookbackPeriod)\n    | where isnotempty(DestinationIP)\n    | summarize BaselineBytes = avg(SentBytes + ReceivedBytes), BaselineCount = count() by DestinationIP, bin(TimeGenerated, 1h)\n    | summarize AvgBaselineBytes = avg(BaselineBytes), AvgBaselineCount = avg(BaselineCount) by DestinationIP;\nlet recentTraffic = CommonSecurityLogSafe\n    | where TimeGenerated > ago(15m)\n    | where isnotempty(DestinationIP)\n    | summarize RecentBytes = sum(SentBytes + ReceivedBytes), RecentCount = count() by DestinationIP;\nrecentTraffic\n    | join kind=inner (trafficBaseline) on DestinationIP\n    | where RecentBytes > AvgBaselineBytes * 3 or RecentCount > AvgBaselineCount * 3\n    | extend TrafficChange = iff(AvgBaselineBytes > 0, round((RecentBytes - AvgBaselineBytes) / AvgBaselineBytes * 100, 2), 0.0)\n    | join kind=inner (bgpChanges) on $left.DestinationIP == $right.indicator\n    | project TimeGenerated = ChangeTime, IPAddress = DestinationIP, Prefix = bgpPrefix, OriginASN = NewOrigin, OldOriginASN = OldOrigin, TrafficChange, RecentBytes, AvgBaselineBytes\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "P1D",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Collection"
        ],
        "techniques": [
          "T1557"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}