CYFIRMA - Attack Surface - DomainIP Vulnerability Exposure Medium Rule

Back


Id	a2f2c91b-5796-45e4-82c7-61763e6c2c9c
Rulename	CYFIRMA - Attack Surface - Domain/IP Vulnerability Exposure Medium Rule
Description	“This rule is triggered when CYFIRMA identifies publicly exposed vulnerabilities on domains or IP addresses within your organization’s attack surface. These vulnerabilities may include outdated software, missing patches, insecure services, or misconfigurations that can be exploited by threat actors.Such exposure significantly increases the risk of exploitation, lateral movement, or data breach. Immediate investigation and remediation are recommended.”
Severity	Medium
Tactics	InitialAccess Discovery DefenseEvasion Persistence Execution Impact PrivilegeEscalation
Techniques	T1505 T1068 T1046 T1499
Required data connectors	CyfirmaAttackSurfaceAlertsConnector
Kind	Scheduled
Query frequency	5m
Query period	5m
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Attack Surface/Analytic Rules/ASDomainIPVulnerabilitiesMediumRule.yaml
Version	1.0.1
Arm template	a2f2c91b-5796-45e4-82c7-61763e6c2c9c.json

KQL

// Medium Severity Domain/IP Vulnerability Exposure Detected
let timeFrame = 5m;
CyfirmaASDomainIPVulnerabilityAlerts_CL
| where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())
| mv-expand pvuln = possible_vulnerabilities
| extend cve = tostring(pvuln.cveNo), vulProducts = pvuln.products
| mv-expand vul_Products = vulProducts
| summarize cveList = make_set(cve, 100), vul_products1 = make_set(vul_Products, 100)    by uid
| join kind=inner (CyfirmaASDomainIPVulnerabilityAlerts_CL
    | where severity == 'High'
    | summarize arg_max(TimeGenerated, *) by uid)
    on uid
| extend
    Vulnerabilities = strcat_array(cveList, ', '),
    VulnerabilityProducts = strcat_array(vul_products1, ', '),
    Description=description,
    FirstSeen=first_seen,
    LastSeen=last_seen,
    RiskScore=risk_score,
    Domain=sub_domain,
    TopDomain=top_domain,
    NetworkIP=ip,
    AlertUID=alert_uid,
    UID=uid,
    OpenPorts=open_ports,
    HostProvider=host_provider,
    Country=country,
    Softwares=softwares,
    WebServer=web_server,
    WebServerVersion=web_server_version,
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT'
| project
    TimeGenerated,
    Description,
    Domain,
    TopDomain,
    RiskScore,
    FirstSeen,
    LastSeen,
    NetworkIP,
    AlertUID,
    UID,
    Vulnerabilities,
    VulnerabilityProducts,
    OpenPorts,
    HostProvider,
    Country,
    Softwares,
    WebServer,
    WebServerVersion,
    ProviderName,
    ProductName

YAML

eventGroupingSettings:
  aggregationKind: AlertPerResult
incidentConfiguration:
  groupingConfiguration:
    enabled: false
    matchingMethod: AllEntities
    lookbackDuration: PT5H
    reopenClosedIncident: false
  createIncident: true
queryPeriod: 5m
name: CYFIRMA - Attack Surface - Domain/IP Vulnerability Exposure Medium Rule
status: Available
customDetails:
  LastSeen: LastSeen
  WebServer: WebServer
  RiskScore: RiskScore
  vulnerableProducts: VulnerabilityProducts
  HostProvider: HostProvider
  WebServerVersion: WebServerVersion
  Vulnerabilities: Vulnerabilities
  OpenPorts: OpenPorts
  TimeGenerated: TimeGenerated
  Country: Country
  UID: UID
  Softwares: Softwares
  FirstSeen: FirstSeen
  AlertUID: AlertUID
entityMappings:
- fieldMappings:
  - columnName: Domain
    identifier: DomainName
  entityType: DNS
- fieldMappings:
  - columnName: TopDomain
    identifier: HostName
  - columnName: Domain
    identifier: DnsDomain
  entityType: Host
- fieldMappings:
  - columnName: NetworkIP
    identifier: Address
  entityType: IP
alertDetailsOverride:
  alertDescriptionFormat: CYFIRMA - Medium Severity Domain/IP Vulnerability Exposure Detected - {{Description}}
  alertDynamicProperties:
  - value: ProductName
    alertProperty: ProductName
  - value: ProviderName
    alertProperty: ProviderName
  alertDisplayNameFormat: 'CYFIRMA - Medium Severity Domain/IP Vulnerability Exposure Detected - Domain: {{Domain}}, IP: {{NetworkIP}}'
version: 1.0.1
description: |
    "This rule is triggered when CYFIRMA identifies publicly exposed vulnerabilities on domains or IP addresses within your organization's attack surface. These vulnerabilities may include outdated software, missing patches, insecure services, or misconfigurations that can be exploited by threat actors.Such exposure significantly increases the risk of exploitation, lateral movement, or data breach. Immediate investigation and remediation are recommended."
severity: Medium
id: a2f2c91b-5796-45e4-82c7-61763e6c2c9c
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Attack Surface/Analytic Rules/ASDomainIPVulnerabilitiesMediumRule.yaml
tactics:
- InitialAccess
- Discovery
- DefenseEvasion
- Persistence
- Execution
- Impact
- PrivilegeEscalation
requiredDataConnectors:
- connectorId: CyfirmaAttackSurfaceAlertsConnector
  dataTypes:
  - CyfirmaASDomainIPVulnerabilityAlerts_CL
queryFrequency: 5m
triggerThreshold: 0
query: |
  // Medium Severity Domain/IP Vulnerability Exposure Detected
  let timeFrame = 5m;
  CyfirmaASDomainIPVulnerabilityAlerts_CL
  | where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())
  | mv-expand pvuln = possible_vulnerabilities
  | extend cve = tostring(pvuln.cveNo), vulProducts = pvuln.products
  | mv-expand vul_Products = vulProducts
  | summarize cveList = make_set(cve, 100), vul_products1 = make_set(vul_Products, 100)    by uid
  | join kind=inner (CyfirmaASDomainIPVulnerabilityAlerts_CL
      | where severity == 'High'
      | summarize arg_max(TimeGenerated, *) by uid)
      on uid
  | extend
      Vulnerabilities = strcat_array(cveList, ', '),
      VulnerabilityProducts = strcat_array(vul_products1, ', '),
      Description=description,
      FirstSeen=first_seen,
      LastSeen=last_seen,
      RiskScore=risk_score,
      Domain=sub_domain,
      TopDomain=top_domain,
      NetworkIP=ip,
      AlertUID=alert_uid,
      UID=uid,
      OpenPorts=open_ports,
      HostProvider=host_provider,
      Country=country,
      Softwares=softwares,
      WebServer=web_server,
      WebServerVersion=web_server_version,
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT'
  | project
      TimeGenerated,
      Description,
      Domain,
      TopDomain,
      RiskScore,
      FirstSeen,
      LastSeen,
      NetworkIP,
      AlertUID,
      UID,
      Vulnerabilities,
      VulnerabilityProducts,
      OpenPorts,
      HostProvider,
      Country,
      Softwares,
      WebServer,
      WebServerVersion,
      ProviderName,
      ProductName  
relevantTechniques:
- T1505
- T1068
- T1046
- T1499
kind: Scheduled
triggerOperator: gt

ARM