CYFIRMA - Attack Surface - Malicious DomainIP Reputation High Rule

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Id	7ff6f6d7-9672-4567-99fc-cb8a58c3bce7
Rulename	CYFIRMA - Attack Surface - Malicious Domain/IP Reputation High Rule
Description	“This alert is raised when CYFIRMA detects a critical reputation score for an IP address linked to your infrastructure. The IP has been previously associated with hacking activity and web application attacks. Denied outbound traffic to a foreign country from a known Microsoft data center IP suggests potential misuse or compromise of cloud infrastructure.”
Severity	High
Tactics	InitialAccess CommandAndControl Reconnaissance Impact DefenseEvasion Exfiltration
Techniques	T1566.002 T1071.001 T1090.002 T1595.002 T1036.005 T1499 T1041
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/ASDomainIPreputationsHighRule.yaml
Version	1.0.1
Arm template	7ff6f6d7-9672-4567-99fc-cb8a58c3bce7.json

KQL

// High Severity - Malicious Domain/IP Reputation Detected
let timeFrame = 5m;
CyfirmaASDomainIPReputationAlerts_CL
| where severity == 'Critical' and TimeGenerated between (ago(timeFrame) .. now())
| extend
    FirstSeen=first_seen,
    LastSeen=last_seen,
    RiskScore=risk_score,
    Domain=sub_domain,
    TopDomain=top_domain,
    NetworkIP=ip,
    AlertUID=alert_uid,
    UID=uid,
    Categories=categories,
    IPversion=ip_version,
    ISP=isp,
    ThreatActors=threat_actors,
    Country=country,
    LastUsersReported=last_users_reported,
    ProviderName='CYFIRMA',
    ProductName='DeCYFIR/DeTCT'
| project
    TimeGenerated,
    Domain,
    TopDomain,
    RiskScore,
    FirstSeen,
    LastSeen,
    NetworkIP,
    AlertUID,
    UID,
    Categories,
    IPversion,
    ISP,
    ThreatActors,
    Country,
    LastUsersReported,
    ProviderName,
    ProductName

YAML

severity: High
query: |
  // High Severity - Malicious Domain/IP Reputation Detected
  let timeFrame = 5m;
  CyfirmaASDomainIPReputationAlerts_CL
  | where severity == 'Critical' and TimeGenerated between (ago(timeFrame) .. now())
  | extend
      FirstSeen=first_seen,
      LastSeen=last_seen,
      RiskScore=risk_score,
      Domain=sub_domain,
      TopDomain=top_domain,
      NetworkIP=ip,
      AlertUID=alert_uid,
      UID=uid,
      Categories=categories,
      IPversion=ip_version,
      ISP=isp,
      ThreatActors=threat_actors,
      Country=country,
      LastUsersReported=last_users_reported,
      ProviderName='CYFIRMA',
      ProductName='DeCYFIR/DeTCT'
  | project
      TimeGenerated,
      Domain,
      TopDomain,
      RiskScore,
      FirstSeen,
      LastSeen,
      NetworkIP,
      AlertUID,
      UID,
      Categories,
      IPversion,
      ISP,
      ThreatActors,
      Country,
      LastUsersReported,
      ProviderName,
      ProductName  
queryPeriod: 5m
status: Available
alertDetailsOverride:
  alertDescriptionFormat: 'CYFIRMA - High Severity Malicious Domain/IP Reputation Alert - Domain: {{Domain}}, IP: {{NetworkIP}} '
  alertDynamicProperties:
  - alertProperty: ProductName
    value: ProductName
  - alertProperty: ProviderName
    value: ProviderName
  alertDisplayNameFormat: 'CYFIRMA - High Severity Malicious Domain/IP Reputation Alert - Domain: {{Domain}}, IP: {{NetworkIP}} '
kind: Scheduled
eventGroupingSettings:
  aggregationKind: AlertPerResult
relevantTechniques:
- T1566.002
- T1071.001
- T1090.002
- T1595.002
- T1036.005
- T1499
- T1041
tactics:
- InitialAccess
- CommandAndControl
- Reconnaissance
- Impact
- DefenseEvasion
- Exfiltration
triggerOperator: gt
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Attack Surface/Analytic Rules/ASDomainIPreputationsHighRule.yaml
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
name: CYFIRMA - Attack Surface - Malicious Domain/IP Reputation High Rule
triggerThreshold: 0
version: 1.0.1
incidentConfiguration:
  createIncident: true
  groupingConfiguration:
    reopenClosedIncident: false
    enabled: false
    lookbackDuration: PT5H
    matchingMethod: AllEntities
id: 7ff6f6d7-9672-4567-99fc-cb8a58c3bce7
customDetails:
  RiskScore: RiskScore
  Country: Country
  IPversion: IPversion
  ThreatActors: ThreatActors
  UID: UID
  FirstSeen: FirstSeen
  TimeGenerated: TimeGenerated
  LastSeen: LastSeen
  ISP: ISP
  Categories: Categories
  LastUsersReported: LastUsersReported
  AlertUID: AlertUID
description: |
  "This alert is raised when CYFIRMA detects a critical reputation score for an IP address linked to your infrastructure. 
  The IP has been previously associated with hacking activity and web application attacks. 
  Denied outbound traffic to a foreign country from a known Microsoft data center IP suggests potential misuse or compromise of cloud infrastructure."  
requiredDataConnectors:
- connectorId: CyfirmaAttackSurfaceAlertsConnector
  dataTypes:
  - CyfirmaASDomainIPReputationAlerts_CL

ARM