Analytic rule catalog
CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule
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| Id | e41b7640-9ba6-42d6-a4c9-1ab6932a0b14 |
| Rulename | CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule |
| Description | “This KQL query identifies network-based indicators from CYFIRMA intelligence that are associated with the role ‘TOR’. These indicators may include IP addresses, domains, and URLs related to Tor network activity. Threat actors often use Tor for anonymous communication, command and control, data exfiltration, and evasion of network defenses.” |
| Severity | Medium |
| Tactics | CommandAndControl Exfiltration InitialAccess Persistence Reconnaissance |
| Techniques | T1090 T1572 T1048 T1071 T1189 T1505 T1595 T1090.003 T1048.002 T1071.001 T1505.003 T1595.002 |
| 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/TORNodeNetworkIndicatorsMonitorMediumSeverityRule.yaml |
| Version | 1.0.1 |
| Arm template | e41b7640-9ba6-42d6-a4c9-1ab6932a0b14.json |
//TOR Node Network Indicators - Monitor Recommended
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 'Monitor' and Roles has 'TOR'
| extend IPv4 = extract(@"ipv4-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend IPv6 = extract(@"ipv6-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend URL = extract(@"url:value\s*=\s*'([^']+)'", 1, pattern)
| extend Domain = extract(@"domain-name:value\s*=\s*'([^']+)'", 1, pattern)
| extend parsed = parse_json(extensions)
| extend extensionKeys = bag_keys(parsed)
| mv-expand extensionKeys
| extend extensionKeyStr = tostring(extensionKeys)
| extend ext = parsed[extensionKeyStr]
| extend props = ext.properties
| extend
extension_id = extensionKeyStr,
ASN_Owner = props.asn_owner,
ASN = props.asn,
ProviderName = 'CYFIRMA',
ProductName = 'DeCYFIR/DeTCT'
| project
IPv4,
IPv6,
URL,
Domain,
ThreatActors,
RecommendedActions,
Sources,
Roles,
Country,
IPAbuse,
name,
Description,
ConfidenceScore,
IndicatorID,
created,
modified,
valid_from,
Tags,
ThreatType,
TimeGenerated,
SecurityVendors,
ProductName,
ProviderName
queryFrequency: 5m
entityMappings:
- fieldMappings:
- columnName: IPv4
identifier: Address
entityType: IP
- fieldMappings:
- columnName: IPv6
identifier: Address
entityType: IP
- fieldMappings:
- columnName: Domain
identifier: DomainName
entityType: DNS
- fieldMappings:
- columnName: URL
identifier: Url
entityType: URL
incidentConfiguration:
createIncident: true
groupingConfiguration:
lookbackDuration: PT5H
matchingMethod: AllEntities
enabled: false
reopenClosedIncident: false
triggerThreshold: 0
enabled: false
suppressionEnabled: true
triggerOperator: GreaterThan
severity: Medium
suppressionDuration: 5m
eventGroupingSettings:
aggregationKind: AlertPerResult
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Cyber%20Intelligence/Analytic%20Rules/TORNodeNetworkIndicatorsMonitorMediumSeverityRule.yaml
alertDetailsOverride:
alertDisplayNameFormat: 'High-Confidence TOR Node Network Indicators - Monitor Recommended - {{name}} '
alertDynamicProperties:
- alertProperty: ProductName
value: ProductName
- alertProperty: ProviderName
value: ProviderName
alertDescriptionFormat: '{{Description}} - {{name}} '
query: |
//TOR Node Network Indicators - Monitor Recommended
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 'Monitor' and Roles has 'TOR'
| extend IPv4 = extract(@"ipv4-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend IPv6 = extract(@"ipv6-addr:value\s*=\s*'([^']+)'", 1, pattern)
| extend URL = extract(@"url:value\s*=\s*'([^']+)'", 1, pattern)
| extend Domain = extract(@"domain-name:value\s*=\s*'([^']+)'", 1, pattern)
| extend parsed = parse_json(extensions)
| extend extensionKeys = bag_keys(parsed)
| mv-expand extensionKeys
| extend extensionKeyStr = tostring(extensionKeys)
| extend ext = parsed[extensionKeyStr]
| extend props = ext.properties
| extend
extension_id = extensionKeyStr,
ASN_Owner = props.asn_owner,
ASN = props.asn,
ProviderName = 'CYFIRMA',
ProductName = 'DeCYFIR/DeTCT'
| project
IPv4,
IPv6,
URL,
Domain,
ThreatActors,
RecommendedActions,
Sources,
Roles,
Country,
IPAbuse,
name,
Description,
ConfidenceScore,
IndicatorID,
created,
modified,
valid_from,
Tags,
ThreatType,
TimeGenerated,
SecurityVendors,
ProductName,
ProviderName
tactics:
- CommandAndControl
- Exfiltration
- InitialAccess
- Persistence
- Reconnaissance
queryPeriod: 5m
customDetails:
Sources: Sources
IndicatorID: IndicatorID
Country: Country
Roles: Roles
Modified: modified
SecurityVendors: SecurityVendors
TimeGenerated: TimeGenerated
ThreatType: ThreatType
IPAbuse: IPAbuse
ThreatActors: ThreatActors
Description: Description
Created: created
RecommendedActions: RecommendedActions
ConfidenceScore: ConfidenceScore
ValidFrom: valid_from
Tags: Tags
relevantTechniques:
- T1090
- T1572
- T1048
- T1071
- T1189
- T1505
- T1595
- T1090.003
- T1048.002
- T1071.001
- T1505.003
- T1595.002
requiredDataConnectors:
- connectorId: CyfirmaCyberIntelligenceDC
dataTypes:
- CyfirmaIndicators_CL
id: e41b7640-9ba6-42d6-a4c9-1ab6932a0b14
version: 1.0.1
description: |
"This KQL query identifies network-based indicators from CYFIRMA intelligence that are associated with the role 'TOR'.
These indicators may include IP addresses, domains, and URLs related to Tor network activity.
Threat actors often use Tor for anonymous communication, command and control, data exfiltration, and evasion of network defenses."
kind: Scheduled
name: CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule
{
"$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/e41b7640-9ba6-42d6-a4c9-1ab6932a0b14')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/e41b7640-9ba6-42d6-a4c9-1ab6932a0b14')]",
"properties": {
"alertDetailsOverride": {
"alertDescriptionFormat": "{{Description}} - {{name}} ",
"alertDisplayNameFormat": "High-Confidence TOR Node Network Indicators - Monitor Recommended - {{name}} ",
"alertDynamicProperties": [
{
"alertProperty": "ProductName",
"value": "ProductName"
},
{
"alertProperty": "ProviderName",
"value": "ProviderName"
}
]
},
"alertRuleTemplateName": "e41b7640-9ba6-42d6-a4c9-1ab6932a0b14",
"customDetails": {
"ConfidenceScore": "ConfidenceScore",
"Country": "Country",
"Created": "created",
"Description": "Description",
"IndicatorID": "IndicatorID",
"IPAbuse": "IPAbuse",
"Modified": "modified",
"RecommendedActions": "RecommendedActions",
"Roles": "Roles",
"SecurityVendors": "SecurityVendors",
"Sources": "Sources",
"Tags": "Tags",
"ThreatActors": "ThreatActors",
"ThreatType": "ThreatType",
"TimeGenerated": "TimeGenerated",
"ValidFrom": "valid_from"
},
"description": "\"This KQL query identifies network-based indicators from CYFIRMA intelligence that are associated with the role 'TOR'. \nThese indicators may include IP addresses, domains, and URLs related to Tor network activity. \nThreat actors often use Tor for anonymous communication, command and control, data exfiltration, and evasion of network defenses.\"\n",
"displayName": "CYFIRMA - Medium severity TOR Node Network Indicators - Monitor Recommended Rule",
"enabled": false,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPv4",
"identifier": "Address"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPv6",
"identifier": "Address"
}
]
},
{
"entityType": "DNS",
"fieldMappings": [
{
"columnName": "Domain",
"identifier": "DomainName"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "URL",
"identifier": "Url"
}
]
}
],
"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/TORNodeNetworkIndicatorsMonitorMediumSeverityRule.yaml",
"query": "//TOR Node Network Indicators - Monitor Recommended \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 'Monitor' and Roles has 'TOR'\n| extend IPv4 = extract(@\"ipv4-addr:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend IPv6 = extract(@\"ipv6-addr:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend URL = extract(@\"url:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend Domain = extract(@\"domain-name:value\\s*=\\s*'([^']+)'\", 1, pattern)\n| extend parsed = parse_json(extensions)\n| extend extensionKeys = bag_keys(parsed)\n| mv-expand extensionKeys\n| extend extensionKeyStr = tostring(extensionKeys)\n| extend ext = parsed[extensionKeyStr]\n| extend props = ext.properties\n| extend \n extension_id = extensionKeyStr,\n ASN_Owner = props.asn_owner,\n ASN = props.asn,\n ProviderName = 'CYFIRMA',\n ProductName = 'DeCYFIR/DeTCT'\n| project\n IPv4,\n IPv6,\n URL,\n Domain,\n ThreatActors,\n RecommendedActions,\n Sources,\n Roles,\n Country,\n IPAbuse,\n name,\n Description,\n ConfidenceScore,\n IndicatorID,\n created,\n modified,\n valid_from,\n Tags,\n ThreatType,\n TimeGenerated,\n SecurityVendors,\n ProductName,\n ProviderName\n",
"queryFrequency": "PT5M",
"queryPeriod": "PT5M",
"severity": "Medium",
"subTechniques": [
"T1090.003",
"T1048.002",
"T1071.001",
"T1505.003",
"T1595.002"
],
"suppressionDuration": "PT5M",
"suppressionEnabled": true,
"tactics": [
"CommandAndControl",
"Exfiltration",
"InitialAccess",
"Persistence",
"Reconnaissance"
],
"techniques": [
"T1048",
"T1071",
"T1090",
"T1189",
"T1505",
"T1572",
"T1595"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}