CYFIRMA - High severity File Hash Indicators with Block Action and Malware

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Id	990fc0dc-e7a5-4f6d-bc24-8569652cd773
Rulename	CYFIRMA - High severity File Hash Indicators with Block Action and Malware
Description	“This KQL query retrieves file hash indicators (MD5, SHA1, SHA256) from the CyfirmaIndicators_CL table within the last 5 minutes. It filters records with a confidence score of 80 or higher, containing file hash patterns, a recommended action of ‘Block’, and roles marked as ‘Malware’. Extracted hashes and key threat intelligence details are projected for Blocking and investigation.”
Severity	High
Tactics	InitialAccess Execution Persistence PrivilegeEscalation DefenseEvasion CredentialAccess Discovery LateralMovement Collection Impact
Techniques	T1566 T1203 T1059 T1204 T1547 T1053 T1055 T1027 T1562 T1036 T1003 T1555 T1082 T1057 T1021 T1113 T1486 T1566.001 T1059.001 T1059.003 T1547.001 T1053.005 T1562.001 T1003.001 T1555.003 T1021.002
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/MalwareFileHashIndicatorsBlockHighSeverityRule.yaml
Version	1.0.1
Arm template	990fc0dc-e7a5-4f6d-bc24-8569652cd773.json

KQL

// File Hash Indicators with Block Action and Malware
let timeFrame = 5m;
CyfirmaIndicators_CL 
| where ConfidenceScore >= 80
    and TimeGenerated between (ago(timeFrame) .. now())
    and pattern contains 'file:hashes' and RecommendedActions has 'Block' and (Roles contains "Malware")
| extend MD5 = extract(@"file:hashes\.md5\s*=\s*'([a-fA-F0-9]{32})'", 1, pattern)
| extend SHA1 = extract(@"file:hashes\.'SHA-1'\s*=\s*'([a-fA-F0-9]{40})'", 1, pattern)
| extend SHA256 = extract(@"file:hashes\.'SHA-256'\s*=\s*'([a-fA-F0-9]{64})'", 1, pattern)
| extend
    Algo_MD5='md5',
    Algo_SHA1= 'SHA1',
    Algo_SHA256='SHA256',
    ProviderName = 'CYFIRMA',
    ProductName = 'DeCYFIR/DeTCT'
| project  
    MD5,
    Algo_MD5,
    SHA1,
    Algo_SHA1,
    SHA256,
    Algo_SHA256,
    ThreatActors,
    Sources,
    RecommendedActions,
    Roles,
    Country,
    name,
    Description,
    ConfidenceScore,
    SecurityVendors,
    IndicatorID,
    created,
    modified,
    valid_from,
    Tags,
    ThreatType,
    TimeGenerated,
    ProductName,
    ProviderName

YAML

severity: High
suppressionDuration: 5m
suppressionEnabled: true
relevantTechniques:
- T1566
- T1203
- T1059
- T1204
- T1547
- T1053
- T1055
- T1027
- T1562
- T1036
- T1003
- T1555
- T1082
- T1057
- T1021
- T1113
- T1486
- T1566.001
- T1059.001
- T1059.003
- T1547.001
- T1053.005
- T1562.001
- T1003.001
- T1555.003
- T1021.002
version: 1.0.1
enabled: false
triggerThreshold: 0
eventGroupingSettings:
  aggregationKind: AlertPerResult
tactics:
- InitialAccess
- Execution
- Persistence
- PrivilegeEscalation
- DefenseEvasion
- CredentialAccess
- Discovery
- LateralMovement
- Collection
- Impact
query: |
  // File Hash Indicators with Block Action and Malware
  let timeFrame = 5m;
  CyfirmaIndicators_CL 
  | where ConfidenceScore >= 80
      and TimeGenerated between (ago(timeFrame) .. now())
      and pattern contains 'file:hashes' and RecommendedActions has 'Block' and (Roles contains "Malware")
  | extend MD5 = extract(@"file:hashes\.md5\s*=\s*'([a-fA-F0-9]{32})'", 1, pattern)
  | extend SHA1 = extract(@"file:hashes\.'SHA-1'\s*=\s*'([a-fA-F0-9]{40})'", 1, pattern)
  | extend SHA256 = extract(@"file:hashes\.'SHA-256'\s*=\s*'([a-fA-F0-9]{64})'", 1, pattern)
  | extend
      Algo_MD5='md5',
      Algo_SHA1= 'SHA1',
      Algo_SHA256='SHA256',
      ProviderName = 'CYFIRMA',
      ProductName = 'DeCYFIR/DeTCT'
  | project  
      MD5,
      Algo_MD5,
      SHA1,
      Algo_SHA1,
      SHA256,
      Algo_SHA256,
      ThreatActors,
      Sources,
      RecommendedActions,
      Roles,
      Country,
      name,
      Description,
      ConfidenceScore,
      SecurityVendors,
      IndicatorID,
      created,
      modified,
      valid_from,
      Tags,
      ThreatType,
      TimeGenerated,
      ProductName,
      ProviderName
customDetails:
  ThreatType: ThreatType
  created: created
  ConfidenceScore: ConfidenceScore
  Sources: Sources
  Tags: Tags
  TimeGenerated: TimeGenerated
  SecurityVendors: SecurityVendors
  IndicatorID: IndicatorID
  Country: Country
  ThreatActors: ThreatActors
  Description: Description
  Roles: Roles
  modified: modified
  valid_from: valid_from
  RecommendedActions: RecommendedActions
name: CYFIRMA - High severity File Hash Indicators with Block Action and Malware
alertDetailsOverride:
  alertDescriptionFormat: '{{Description}} - {{name}} '
  alertDynamicProperties:
  - value: ProviderName
    alertProperty: ProviderName
  - value: ProductName
    alertProperty: ProductName
  alertDisplayNameFormat: 'High-Confidence File Hash Indicators with Block Action and Malware - {{name}} '
entityMappings:
- entityType: FileHash
  fieldMappings:
  - identifier: Algorithm
    columnName: Algo_MD5
  - identifier: Value
    columnName: MD5
- entityType: FileHash
  fieldMappings:
  - identifier: Algorithm
    columnName: Algo_SHA1
  - identifier: Value
    columnName: SHA1
- entityType: FileHash
  fieldMappings:
  - identifier: Algorithm
    columnName: Algo_SHA256
  - identifier: Value
    columnName: SHA256
triggerOperator: GreaterThan
requiredDataConnectors:
- dataTypes:
  - CyfirmaIndicators_CL
  connectorId: CyfirmaCyberIntelligenceDC
incidentConfiguration:
  groupingConfiguration:
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    enabled: false
    reopenClosedIncident: false
  createIncident: true
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Cyber%20Intelligence/Analytic%20Rules/MalwareFileHashIndicatorsBlockHighSeverityRule.yaml
kind: Scheduled
queryPeriod: 5m
id: 990fc0dc-e7a5-4f6d-bc24-8569652cd773
description: |
  "This KQL query retrieves file hash indicators (MD5, SHA1, SHA256) from the CyfirmaIndicators_CL table within the last 5 minutes. 
  It filters records with a confidence score of 80 or higher, containing file hash patterns, a recommended action of 'Block', and roles marked as 'Malware'. 
  Extracted hashes and key threat intelligence details are projected for Blocking and investigation."

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/990fc0dc-e7a5-4f6d-bc24-8569652cd773')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/990fc0dc-e7a5-4f6d-bc24-8569652cd773')]",
      "properties": {
        "alertDetailsOverride": {
          "alertDescriptionFormat": "{{Description}} - {{name}} ",
          "alertDisplayNameFormat": "High-Confidence File Hash Indicators with Block Action and Malware - {{name}} ",
          "alertDynamicProperties": [
            {
              "alertProperty": "ProviderName",
              "value": "ProviderName"
            },
            {
              "alertProperty": "ProductName",
              "value": "ProductName"
            }
          ]
        },
        "alertRuleTemplateName": "990fc0dc-e7a5-4f6d-bc24-8569652cd773",
        "customDetails": {
          "ConfidenceScore": "ConfidenceScore",
          "Country": "Country",
          "created": "created",
          "Description": "Description",
          "IndicatorID": "IndicatorID",
          "modified": "modified",
          "RecommendedActions": "RecommendedActions",
          "Roles": "Roles",
          "SecurityVendors": "SecurityVendors",
          "Sources": "Sources",
          "Tags": "Tags",
          "ThreatActors": "ThreatActors",
          "ThreatType": "ThreatType",
          "TimeGenerated": "TimeGenerated",
          "valid_from": "valid_from"
        },
        "description": "\"This KQL query retrieves file hash indicators (MD5, SHA1, SHA256) from the CyfirmaIndicators_CL table within the last 5 minutes. \nIt filters records with a confidence score of 80 or higher, containing file hash patterns, a recommended action of 'Block', and roles marked as 'Malware'. \nExtracted hashes and key threat intelligence details are projected for Blocking and investigation.\"\n",
        "displayName": "CYFIRMA - High severity File Hash Indicators with Block Action and Malware",
        "enabled": false,
        "entityMappings": [
          {
            "entityType": "FileHash",
            "fieldMappings": [
              {
                "columnName": "Algo_MD5",
                "identifier": "Algorithm"
              },
              {
                "columnName": "MD5",
                "identifier": "Value"
              }
            ]
          },
          {
            "entityType": "FileHash",
            "fieldMappings": [
              {
                "columnName": "Algo_SHA1",
                "identifier": "Algorithm"
              },
              {
                "columnName": "SHA1",
                "identifier": "Value"
              }
            ]
          },
          {
            "entityType": "FileHash",
            "fieldMappings": [
              {
                "columnName": "Algo_SHA256",
                "identifier": "Algorithm"
              },
              {
                "columnName": "SHA256",
                "identifier": "Value"
              }
            ]
          }
        ],
        "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/MalwareFileHashIndicatorsBlockHighSeverityRule.yaml",
        "query": "// File Hash Indicators with Block Action and Malware\nlet timeFrame = 5m;\nCyfirmaIndicators_CL \n| where ConfidenceScore >= 80\n    and TimeGenerated between (ago(timeFrame) .. now())\n    and pattern contains 'file:hashes' and RecommendedActions has 'Block' and (Roles contains \"Malware\")\n| extend MD5 = extract(@\"file:hashes\\.md5\\s*=\\s*'([a-fA-F0-9]{32})'\", 1, pattern)\n| extend SHA1 = extract(@\"file:hashes\\.'SHA-1'\\s*=\\s*'([a-fA-F0-9]{40})'\", 1, pattern)\n| extend SHA256 = extract(@\"file:hashes\\.'SHA-256'\\s*=\\s*'([a-fA-F0-9]{64})'\", 1, pattern)\n| extend\n    Algo_MD5='md5',\n    Algo_SHA1= 'SHA1',\n    Algo_SHA256='SHA256',\n    ProviderName = 'CYFIRMA',\n    ProductName = 'DeCYFIR/DeTCT'\n| project  \n    MD5,\n    Algo_MD5,\n    SHA1,\n    Algo_SHA1,\n    SHA256,\n    Algo_SHA256,\n    ThreatActors,\n    Sources,\n    RecommendedActions,\n    Roles,\n    Country,\n    name,\n    Description,\n    ConfidenceScore,\n    SecurityVendors,\n    IndicatorID,\n    created,\n    modified,\n    valid_from,\n    Tags,\n    ThreatType,\n    TimeGenerated,\n    ProductName,\n    ProviderName\n",
        "queryFrequency": "PT5M",
        "queryPeriod": "PT5M",
        "severity": "High",
        "subTechniques": [
          "T1566.001",
          "T1059.001",
          "T1059.003",
          "T1547.001",
          "T1053.005",
          "T1562.001",
          "T1003.001",
          "T1555.003",
          "T1021.002"
        ],
        "suppressionDuration": "PT5M",
        "suppressionEnabled": true,
        "tactics": [
          "Collection",
          "CredentialAccess",
          "DefenseEvasion",
          "Discovery",
          "Execution",
          "Impact",
          "InitialAccess",
          "LateralMovement",
          "Persistence",
          "PrivilegeEscalation"
        ],
        "techniques": [
          "T1003",
          "T1021",
          "T1027",
          "T1036",
          "T1053",
          "T1055",
          "T1057",
          "T1059",
          "T1082",
          "T1113",
          "T1203",
          "T1204",
          "T1486",
          "T1547",
          "T1555",
          "T1562",
          "T1566"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}