Analytic rule catalog
CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block Recommended Rule
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| Id | 77226d6e-1263-42b1-a40d-8a756407ad4c |
| Rulename | CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block Recommended Rule |
| Description | “This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure. These may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts.” |
| Severity | Medium |
| Tactics | InitialAccess Execution CommandAndControl |
| Techniques | T1566 T1189 T1204 T1071 T1090 T1059 T1568 T1566.002 T1204.001 T1071.001 T1568.002 |
| 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/MalwareNetworkIndicatorsBlockMediumSeverityRule.yaml |
| Version | 1.0.1 |
| Arm template | 77226d6e-1263-42b1-a40d-8a756407ad4c.json |
//Network Indicators Associated with Malware - Block Recommended Rule
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 has 'Malware'
| 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
incidentConfiguration:
createIncident: true
groupingConfiguration:
matchingMethod: AllEntities
reopenClosedIncident: false
lookbackDuration: PT5H
enabled: false
relevantTechniques:
- T1566
- T1189
- T1204
- T1071
- T1090
- T1059
- T1568
- T1566.002
- T1204.001
- T1071.001
- T1568.002
description: |
"This analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure.
These may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts."
triggerThreshold: 0
triggerOperator: GreaterThan
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma%20Cyber%20Intelligence/Analytic%20Rules/MalwareNetworkIndicatorsBlockMediumSeverityRule.yaml
enabled: false
id: 77226d6e-1263-42b1-a40d-8a756407ad4c
requiredDataConnectors:
- connectorId: CyfirmaCyberIntelligenceDC
dataTypes:
- CyfirmaIndicators_CL
alertDetailsOverride:
alertDynamicProperties:
- value: ProductName
alertProperty: ProductName
- value: ProviderName
alertProperty: ProviderName
alertDisplayNameFormat: 'High-Confidence Malicious Network Indicators Associated with Malware - Block Recommended - {{name}} '
alertDescriptionFormat: '{{Description}} - {{name}} '
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
version: 1.0.1
severity: Medium
query: |
//Network Indicators Associated with Malware - Block Recommended Rule
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 has 'Malware'
| 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
eventGroupingSettings:
aggregationKind: AlertPerResult
suppressionEnabled: true
customDetails:
Created: created
SecurityVendors: SecurityVendors
ThreatActors: ThreatActors
IndicatorID: IndicatorID
Roles: Roles
ThreatType: ThreatType
Country: Country
ConfidenceScore: ConfidenceScore
Description: Description
IPAbuse: IPAbuse
Modified: modified
TimeGenerated: TimeGenerated
Tags: Tags
Sources: Sources
ValidFrom: valid_from
RecommendedActions: RecommendedActions
queryFrequency: 5m
kind: Scheduled
suppressionDuration: 5m
tactics:
- InitialAccess
- Execution
- CommandAndControl
queryPeriod: 5m
name: CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block 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/77226d6e-1263-42b1-a40d-8a756407ad4c')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/77226d6e-1263-42b1-a40d-8a756407ad4c')]",
"properties": {
"alertDetailsOverride": {
"alertDescriptionFormat": "{{Description}} - {{name}} ",
"alertDisplayNameFormat": "High-Confidence Malicious Network Indicators Associated with Malware - Block Recommended - {{name}} ",
"alertDynamicProperties": [
{
"alertProperty": "ProductName",
"value": "ProductName"
},
{
"alertProperty": "ProviderName",
"value": "ProviderName"
}
]
},
"alertRuleTemplateName": "77226d6e-1263-42b1-a40d-8a756407ad4c",
"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 analytics rule detects network-based indicators identified by CYFIRMA threat intelligence as associated with Command & Control (C2) infrastructure.\nThese may represent attacker-controlled endpoints used to maintain persistence, exfiltrate data, or receive commands from malware-infected hosts.\"\n",
"displayName": "CYFIRMA - Medium severity Malicious Network Indicators Associated with Malware - Block 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/MalwareNetworkIndicatorsBlockMediumSeverityRule.yaml",
"query": "//Network Indicators Associated with Malware - Block Recommended Rule\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 has 'Malware'\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": [
"T1566.002",
"T1204.001",
"T1071.001",
"T1568.002"
],
"suppressionDuration": "PT5M",
"suppressionEnabled": true,
"tactics": [
"CommandAndControl",
"Execution",
"InitialAccess"
],
"techniques": [
"T1059",
"T1071",
"T1090",
"T1189",
"T1204",
"T1566",
"T1568"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}