CYFIRMA - Medium severity Command Control Network Indicators with Monitor Recommendation Rule
| Id | 75931755-27cd-4e4b-a51c-efcca452e2ff |
| Rulename | CYFIRMA - Medium severity Command & Control Network Indicators with Monitor Recommendation 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 | CommandAndControl InitialAccess Exfiltration |
| Techniques | T1071 T1090 T1573 T1105 T1568 T1566 T1041 T1071.001 T1573.001 T1568.002 T1566.002 |
| 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 Cyber Intelligence/Analytic Rules/C2NetworkIndicatorsMonitorMediumSeverityRule.yaml |
| Version | 1.0.1 |
| Arm template | 75931755-27cd-4e4b-a51c-efcca452e2ff.json |
// Network Indicators query with Monitor Recommended Action And C2 Roles
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 contains 'c2' or Roles contains 'Command & Control')
| 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
name: CYFIRMA - Medium severity Command & Control Network Indicators with Monitor Recommendation Rule
eventGroupingSettings:
aggregationKind: AlertPerResult
suppressionEnabled: true
tactics:
- CommandAndControl
- InitialAccess
- Exfiltration
id: 75931755-27cd-4e4b-a51c-efcca452e2ff
alertDetailsOverride:
alertDynamicProperties:
- alertProperty: ProductName
value: ProductName
- alertProperty: ProviderName
value: ProviderName
alertDisplayNameFormat: 'High-Confidence Command & Control Network Indicators with Monitor Recommendation Rule - {{name}} '
alertDescriptionFormat: '{{Description}} - {{name}} '
requiredDataConnectors:
- connectorId: CyfirmaCyberIntelligenceDC
dataTypes:
- CyfirmaIndicators_CL
kind: Scheduled
triggerThreshold: 0
version: 1.0.1
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
relevantTechniques:
- T1071
- T1090
- T1573
- T1105
- T1568
- T1566
- T1041
- T1071.001
- T1573.001
- T1568.002
- T1566.002
enabled: false
queryPeriod: 5m
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: false
reopenClosedIncident: false
matchingMethod: AllEntities
lookbackDuration: PT5H
suppressionDuration: 5m
customDetails:
RecommendedActions: RecommendedActions
ThreatActors: ThreatActors
Roles: Roles
ThreatType: ThreatType
IndicatorID: IndicatorID
Sources: Sources
Created: created
Description: Description
IPAbuse: IPAbuse
ValidFrom: valid_from
Tags: Tags
Modified: modified
Country: Country
TimeGenerated: TimeGenerated
SecurityVendors: SecurityVendors
ConfidenceScore: ConfidenceScore
queryFrequency: 5m
entityMappings:
- fieldMappings:
- identifier: Address
columnName: IPv4
entityType: IP
- fieldMappings:
- identifier: Address
columnName: IPv6
entityType: IP
- fieldMappings:
- identifier: DomainName
columnName: Domain
entityType: DNS
- fieldMappings:
- identifier: Url
columnName: URL
entityType: URL
triggerOperator: GreaterThan
query: |
// Network Indicators query with Monitor Recommended Action And C2 Roles
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 contains 'c2' or Roles contains 'Command & Control')
| 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
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cyfirma Cyber Intelligence/Analytic Rules/C2NetworkIndicatorsMonitorMediumSeverityRule.yaml
{
"$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/75931755-27cd-4e4b-a51c-efcca452e2ff')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/75931755-27cd-4e4b-a51c-efcca452e2ff')]",
"properties": {
"alertDetailsOverride": {
"alertDescriptionFormat": "{{Description}} - {{name}} ",
"alertDisplayNameFormat": "High-Confidence Command & Control Network Indicators with Monitor Recommendation Rule - {{name}} ",
"alertDynamicProperties": [
{
"alertProperty": "ProductName",
"value": "ProductName"
},
{
"alertProperty": "ProviderName",
"value": "ProviderName"
}
]
},
"alertRuleTemplateName": "75931755-27cd-4e4b-a51c-efcca452e2ff",
"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 Command & Control Network Indicators with Monitor Recommendation 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 Cyber Intelligence/Analytic Rules/C2NetworkIndicatorsMonitorMediumSeverityRule.yaml",
"query": "// Network Indicators query with Monitor Recommended Action And C2 Roles\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 contains 'c2' or Roles contains 'Command & Control')\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": [
"T1071.001",
"T1573.001",
"T1568.002",
"T1566.002"
],
"suppressionDuration": "PT5M",
"suppressionEnabled": true,
"tactics": [
"CommandAndControl",
"Exfiltration",
"InitialAccess"
],
"techniques": [
"T1041",
"T1071",
"T1090",
"T1105",
"T1566",
"T1568",
"T1573"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}