CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block Recommended Rule

Back


Id	77226d6e-1263-42b1-a40d-8a756407ad4c
Rulename	CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block Recommended Rule
Description	“This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure. These may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts.”
Severity	Medium
Tactics	InitialAccess Execution CommandAndControl
Techniques	T1566 T1189 T1204 T1071 T1090 T1059 T1568 T1566.002 T1204.001 T1071.001 T1568.002
Required data connectors	CyfirmaCyberIntelligenceDC
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	GreaterThan
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Cyber%20Intelligence/Analytic%20Rules/MalwareNetworkIndicatorsBlockMediumSeverityRule.yaml
Version	1.0.1
Arm template	77226d6e-1263-42b1-a40d-8a756407ad4c.json

KQL

//Network Indicators Associated with Malware - Block Recommended Rule
let timeFrame= 5m;
CyfirmaIndicators_CL 
| where  (ConfidenceScore < 80 and ConfidenceScore >= 50)
    and TimeGenerated between (ago(timeFrame) .. now())
    and pattern !contains 'file:hashes' and RecommendedActions has 'Block' and Roles has 'Malware'
| extend IPv4 = extract(@"ipv4-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend IPv6 = extract(@"ipv6-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend URL = extract(@"url:value\s*=\s*'([^']+)'", 1, pattern)
| extend Domain = extract(@"domain-name:value\s*=\s*'([^']+)'", 1, pattern)
| extend parsed = parse_json(extensions)
| extend extensionKeys = bag_keys(parsed)
| mv-expand extensionKeys
| extend extensionKeyStr = tostring(extensionKeys)
| extend ext = parsed[extensionKeyStr]
| extend props = ext.properties
| extend 
    extension_id = extensionKeyStr,
    ASN_Owner = props.asn_owner,
    ASN = props.asn,
    ProviderName = 'CYFIRMA',
    ProductName = 'DeCYFIR/DeTCT'
| project
    IPv4,
    IPv6,
    URL,
    Domain,
    ThreatActors,
    RecommendedActions,
    Sources,
    Roles,
    Country,
    IPAbuse,
    name,
    Description,
    ConfidenceScore,
    IndicatorID,
    created,
    modified,
    valid_from,
    Tags,
    ThreatType,
    TimeGenerated,
    SecurityVendors,
    ProductName,
    ProviderName

YAML

suppressionEnabled: true
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
tactics:
- InitialAccess
- Execution
- CommandAndControl
severity: Medium
triggerThreshold: 0
id: 77226d6e-1263-42b1-a40d-8a756407ad4c
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Cyber%20Intelligence/Analytic%20Rules/MalwareNetworkIndicatorsBlockMediumSeverityRule.yaml
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    enabled: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
    reopenClosedIncident: false
enabled: false
eventGroupingSettings:
  aggregationKind: AlertPerResult
alertDetailsOverride:
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators Associated with Malware - Block Recommended - {{name}} '
name: CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block Recommended Rule
query: |
  //Network Indicators Associated with Malware - Block Recommended Rule
  let timeFrame= 5m;
  CyfirmaIndicators_CL 
  | where  (ConfidenceScore < 80 and ConfidenceScore >= 50)
      and TimeGenerated between (ago(timeFrame) .. now())
      and pattern !contains 'file:hashes' and RecommendedActions has 'Block' and Roles has 'Malware'
  | extend IPv4 = extract(@"ipv4-addr:value\s*=\s*'([^']+)'", 1, pattern)
  | extend IPv6 = extract(@"ipv6-addr:value\s*=\s*'([^']+)'", 1, pattern)
  | extend URL = extract(@"url:value\s*=\s*'([^']+)'", 1, pattern)
  | extend Domain = extract(@"domain-name:value\s*=\s*'([^']+)'", 1, pattern)
  | extend parsed = parse_json(extensions)
  | extend extensionKeys = bag_keys(parsed)
  | mv-expand extensionKeys
  | extend extensionKeyStr = tostring(extensionKeys)
  | extend ext = parsed[extensionKeyStr]
  | extend props = ext.properties
  | extend 
      extension_id = extensionKeyStr,
      ASN_Owner = props.asn_owner,
      ASN = props.asn,
      ProviderName = 'CYFIRMA',
      ProductName = 'DeCYFIR/DeTCT'
  | project
      IPv4,
      IPv6,
      URL,
      Domain,
      ThreatActors,
      RecommendedActions,
      Sources,
      Roles,
      Country,
      IPAbuse,
      name,
      Description,
      ConfidenceScore,
      IndicatorID,
      created,
      modified,
      valid_from,
      Tags,
      ThreatType,
      TimeGenerated,
      SecurityVendors,
      ProductName,
      ProviderName
queryPeriod: 5m
queryFrequency: 5m
triggerOperator: GreaterThan
customDetails:
  Country: Country
  Tags: Tags
  Modified: modified
  ThreatType: ThreatType
  SecurityVendors: SecurityVendors
  Sources: Sources
  TimeGenerated: TimeGenerated
  ThreatActors: ThreatActors
  ConfidenceScore: ConfidenceScore
  ValidFrom: valid_from
  RecommendedActions: RecommendedActions
  Roles: Roles
  IPAbuse: IPAbuse
  IndicatorID: IndicatorID
  Created: created
  Description: Description
version: 1.0.1
suppressionDuration: 5m
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPv4
    identifier: Address
- entityType: IP
  fieldMappings:
  - columnName: IPv6
    identifier: Address
- entityType: DNS
  fieldMappings:
  - columnName: Domain
    identifier: DomainName
- entityType: URL
  fieldMappings:
  - columnName: URL
    identifier: Url
relevantTechniques:
- T1566
- T1189
- T1204
- T1071
- T1090
- T1059
- T1568
- T1566.002
- T1204.001
- T1071.001
- T1568.002
kind: Scheduled
description: |
  "This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure.
  These may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts."

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/77226d6e-1263-42b1-a40d-8a756407ad4c')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/77226d6e-1263-42b1-a40d-8a756407ad4c')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} - {{name}} ",
          "alertDisplayNameFormat": "High-Confidence Malicious Network Indicators Associated with Malware - Block Recommended - {{name}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            },
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            }
          ]
        },
        "alertRuleTemplateName": "77226d6e-1263-42b1-a40d-8a756407ad4c",
        "customDetails": {
          "ConfidenceScore": "ConfidenceScore",
          "Country": "Country",
          "Created": "created",
          "Description": "Description",
          "IndicatorID": "IndicatorID",
          "IPAbuse": "IPAbuse",
          "Modified": "modified",
          "RecommendedActions": "RecommendedActions",
          "Roles": "Roles",
          "SecurityVendors": "SecurityVendors",
          "Sources": "Sources",
          "Tags": "Tags",
          "ThreatActors": "ThreatActors",
          "ThreatType": "ThreatType",
          "TimeGenerated": "TimeGenerated",
          "ValidFrom": "valid_from"
        },
        "description": "\"This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure.\nThese may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts.\"\n",
        "displayName": "CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block Recommended Rule",
        "enabled": false,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPv4",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPv6",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "DNS",
            "fieldMappings": [
              {
                "columnName": "Domain",
                "identifier": "DomainName"
              }
            ]
          },
          {
            "entityType": "URL",
            "fieldMappings": [
              {
                "columnName": "URL",
                "identifier": "Url"
              }
            ]
          }
        ],
        "eventGroupingSettings": {
          "aggregationKind": "AlertPerResult"
        },
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": false,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Cyber%20Intelligence/Analytic%20Rules/MalwareNetworkIndicatorsBlockMediumSeverityRule.yaml",
        "query": "//Network Indicators Associated with Malware - Block Recommended Rule\nlet timeFrame= 5m;\nCyfirmaIndicators_CL \n| where  (ConfidenceScore < 80 and ConfidenceScore >= 50)\n    and TimeGenerated between (ago(timeFrame) .. now())\n    and pattern !contains 'file:hashes' and RecommendedActions has 'Block' and Roles has 'Malware'\n| extend IPv4 = extract(@\"ipv4-addr:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend IPv6 = extract(@\"ipv6-addr:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend URL = extract(@\"url:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend Domain = extract(@\"domain-name:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend parsed = parse_json(extensions)\n| extend extensionKeys = bag_keys(parsed)\n| mv-expand extensionKeys\n| extend extensionKeyStr = tostring(extensionKeys)\n| extend ext = parsed[extensionKeyStr]\n| extend props = ext.properties\n| extend \n    extension_id = extensionKeyStr,\n    ASN_Owner = props.asn_owner,\n    ASN = props.asn,\n    ProviderName = 'CYFIRMA',\n    ProductName = 'DeCYFIR/DeTCT'\n| project\n    IPv4,\n    IPv6,\n    URL,\n    Domain,\n    ThreatActors,\n    RecommendedActions,\n    Sources,\n    Roles,\n    Country,\n    IPAbuse,\n    name,\n    Description,\n    ConfidenceScore,\n    IndicatorID,\n    created,\n    modified,\n    valid_from,\n    Tags,\n    ThreatType,\n    TimeGenerated,\n    SecurityVendors,\n    ProductName,\n    ProviderName\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "Medium",
        "subTechniques": [
          "T1566.002",
          "T1204.001",
          "T1071.001",
          "T1568.002"
        ],
        "suppressionDuration": "PT5M",
        "suppressionEnabled": true,
        "tactics": [
          "CommandAndControl",
          "Execution",
          "InitialAccess"
        ],
        "techniques": [
          "T1059",
          "T1071",
          "T1090",
          "T1189",
          "T1204",
          "T1566",
          "T1568"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}