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

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Id	24dcff02-123c-4e10-a531-2a22a609120a
Rulename	CYFIRMA - Medium 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	Medium
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 Cyber Intelligence/Analytic Rules/MalwareFileHashIndicatorsBlockMediumSeverityRule.yaml
Version	1.0.0
Arm template	24dcff02-123c-4e10-a531-2a22a609120a.json

KQL

// File Hash Indicators with Block Action and Malware
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 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

tactics:
- InitialAccess
- Execution
- Persistence
- PrivilegeEscalation
- DefenseEvasion
- CredentialAccess
- Discovery
- LateralMovement
- Collection
- Impact
enabled: false
id: 24dcff02-123c-4e10-a531-2a22a609120a
requiredDataConnectors:
- connectorId: CyfirmaCyberIntelligenceDC
  dataTypes:
  - CyfirmaIndicators_CL
query: |
  // File Hash Indicators with Block Action and Malware
  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 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  
eventGroupingSettings:
  aggregationKind: AlertPerResult
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
name: CYFIRMA - Medium 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."  
triggerOperator: GreaterThan
queryPeriod: 5m
suppressionDuration: 5m
severity: Medium
entityMappings:
- 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
  entityType: FileHash
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/MalwareFileHashIndicatorsBlockMediumSeverityRule.yaml
version: 1.0.0
alertDetailsOverride:
  alertDynamicProperties:
  - alertProperty: ProviderName
    value: ProviderName
  - alertProperty: ProductName
    value: ProductName
  alertDisplayNameFormat: 'High-Confidence File Hash Indicators with Block Action and Malware - {{name}} '
  alertDescriptionFormat: '{{Description}} - {{name}} '
triggerThreshold: 0
suppressionEnabled: true
queryFrequency: 5m
kind: Scheduled
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    matchingMethod: AllEntities
    reopenClosedIncident: false
    lookbackDuration: 5m
    enabled: false
customDetails:
  modified: modified
  ConfidenceScore: ConfidenceScore
  valid_from: valid_from
  RecommendedActions: RecommendedActions
  created: created
  ThreatActors: ThreatActors
  TimeGenerated: TimeGenerated
  Description: Description
  SecurityVendors: SecurityVendors
  IndicatorID: IndicatorID
  Tags: Tags
  Sources: Sources
  Country: Country
  ThreatType: ThreatType
  Roles: Roles

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/24dcff02-123c-4e10-a531-2a22a609120a')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/24dcff02-123c-4e10-a531-2a22a609120a')]",
      "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": "24dcff02-123c-4e10-a531-2a22a609120a",
        "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 - Medium 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": "PT5M",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/MalwareFileHashIndicatorsBlockMediumSeverityRule.yaml",
        "query": "// File Hash Indicators with Block Action and Malware\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 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": "Medium",
        "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": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}