Analytic rule catalog
CYFIRMA - Attack Surface - Malicious DomainIP Reputation Medium Rule
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| Id | 70f137e4-e4ef-4635-92de-10c4f5b0fcd0 |
| Rulename | CYFIRMA - Attack Surface - Malicious Domain/IP Reputation Medium 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 | Medium |
| Tactics | InitialAccess CommandAndControl Reconnaissance Impact DefenseEvasion Exfiltration |
| Techniques | T1566 T1071 T1090 T1595 T1499 T1036 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%20Attack%20Surface/Analytic%20Rules/ASDomainIPreputationsMediumRule.yaml |
| Version | 1.0.1 |
| Arm template | 70f137e4-e4ef-4635-92de-10c4f5b0fcd0.json |
// Medium Severity - Malicious Domain/IP Reputation Detected
let timeFrame = 5m;
CyfirmaASDomainIPReputationAlerts_CL
| where severity == 'High' 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
tactics:
- InitialAccess
- CommandAndControl
- Reconnaissance
- Impact
- DefenseEvasion
- Exfiltration
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."
incidentConfiguration:
createIncident: true
groupingConfiguration:
reopenClosedIncident: false
lookbackDuration: PT5H
enabled: false
matchingMethod: AllEntities
queryPeriod: 5m
severity: Medium
customDetails:
Categories: Categories
RiskScore: RiskScore
UID: UID
AlertUID: AlertUID
IPversion: IPversion
FirstSeen: FirstSeen
Country: Country
ISP: ISP
TimeGenerated: TimeGenerated
ThreatActors: ThreatActors
LastSeen: LastSeen
LastUsersReported: LastUsersReported
queryFrequency: 5m
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Attack%20Surface/Analytic%20Rules/ASDomainIPreputationsMediumRule.yaml
kind: Scheduled
id: 70f137e4-e4ef-4635-92de-10c4f5b0fcd0
triggerOperator: gt
alertDetailsOverride:
alertDynamicProperties:
- alertProperty: ProductName
value: ProductName
- alertProperty: ProviderName
value: ProviderName
alertDescriptionFormat: 'CYFIRMA - Medium Severity Malicious Domain/IP Reputation Alert - Domain: {{Domain}}, IP: {{NetworkIP}} '
alertDisplayNameFormat: 'CYFIRMA - Medium Severity Malicious Domain/IP Reputation Alert - Domain: {{Domain}}, IP: {{NetworkIP}} '
status: Available
relevantTechniques:
- T1566
- T1071
- T1090
- T1595
- T1499
- T1036
- T1041
triggerThreshold: 0
eventGroupingSettings:
aggregationKind: AlertPerResult
requiredDataConnectors:
- dataTypes:
- CyfirmaASDomainIPReputationAlerts_CL
connectorId: CyfirmaAttackSurfaceAlertsConnector
version: 1.0.1
name: CYFIRMA - Attack Surface - Malicious Domain/IP Reputation Medium Rule
entityMappings:
- entityType: DNS
fieldMappings:
- columnName: Domain
identifier: DomainName
- entityType: Host
fieldMappings:
- columnName: TopDomain
identifier: HostName
- columnName: Domain
identifier: DnsDomain
- entityType: IP
fieldMappings:
- columnName: NetworkIP
identifier: Address
query: |
// Medium Severity - Malicious Domain/IP Reputation Detected
let timeFrame = 5m;
CyfirmaASDomainIPReputationAlerts_CL
| where severity == 'High' 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
{
"$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/70f137e4-e4ef-4635-92de-10c4f5b0fcd0')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/70f137e4-e4ef-4635-92de-10c4f5b0fcd0')]",
"properties": {
"alertDetailsOverride": {
"alertDescriptionFormat": "CYFIRMA - Medium Severity Malicious Domain/IP Reputation Alert - Domain: {{Domain}}, IP: {{NetworkIP}} ",
"alertDisplayNameFormat": "CYFIRMA - Medium Severity Malicious Domain/IP Reputation Alert - Domain: {{Domain}}, IP: {{NetworkIP}} ",
"alertDynamicProperties": [
{
"alertProperty": "ProductName",
"value": "ProductName"
},
{
"alertProperty": "ProviderName",
"value": "ProviderName"
}
]
},
"alertRuleTemplateName": "70f137e4-e4ef-4635-92de-10c4f5b0fcd0",
"customDetails": {
"AlertUID": "AlertUID",
"Categories": "Categories",
"Country": "Country",
"FirstSeen": "FirstSeen",
"IPversion": "IPversion",
"ISP": "ISP",
"LastSeen": "LastSeen",
"LastUsersReported": "LastUsersReported",
"RiskScore": "RiskScore",
"ThreatActors": "ThreatActors",
"TimeGenerated": "TimeGenerated",
"UID": "UID"
},
"description": "\"This alert is raised when CYFIRMA detects a critical reputation score for an IP address linked to your infrastructure. \nThe IP has been previously associated with hacking activity and web application attacks. \nDenied outbound traffic to a foreign country from a known Microsoft data center IP suggests potential misuse or compromise of cloud infrastructure.\"\n",
"displayName": "CYFIRMA - Attack Surface - Malicious Domain/IP Reputation Medium Rule",
"enabled": true,
"entityMappings": [
{
"entityType": "DNS",
"fieldMappings": [
{
"columnName": "Domain",
"identifier": "DomainName"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "TopDomain",
"identifier": "HostName"
},
{
"columnName": "Domain",
"identifier": "DnsDomain"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "NetworkIP",
"identifier": "Address"
}
]
}
],
"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%20Attack%20Surface/Analytic%20Rules/ASDomainIPreputationsMediumRule.yaml",
"query": "// Medium Severity - Malicious Domain/IP Reputation Detected\nlet timeFrame = 5m;\nCyfirmaASDomainIPReputationAlerts_CL\n| where severity == 'High' and TimeGenerated between (ago(timeFrame) .. now())\n| extend\n FirstSeen=first_seen,\n LastSeen=last_seen,\n RiskScore=risk_score,\n Domain=sub_domain,\n TopDomain=top_domain,\n NetworkIP=ip,\n AlertUID=alert_uid,\n UID=uid,\n Categories=categories,\n IPversion=ip_version,\n ISP=isp,\n ThreatActors=threat_actors,\n Country=country,\n LastUsersReported=last_users_reported,\n ProviderName='CYFIRMA',\n ProductName='DeCYFIR/DeTCT'\n| project\n TimeGenerated,\n Domain,\n TopDomain,\n RiskScore,\n FirstSeen,\n LastSeen,\n NetworkIP,\n AlertUID,\n UID,\n Categories,\n IPversion,\n ISP,\n ThreatActors,\n Country,\n LastUsersReported,\n ProviderName,\n ProductName\n",
"queryFrequency": "PT5M",
"queryPeriod": "PT5M",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl",
"DefenseEvasion",
"Exfiltration",
"Impact",
"InitialAccess",
"Reconnaissance"
],
"techniques": [
"T1036",
"T1041",
"T1071",
"T1090",
"T1499",
"T1566",
"T1595"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}