Microsoft Sentinel Analytic Rules
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Caramel Tsunami Actor IOC - July 2021

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Id066395ac-ef91-4993-8bf6-25c61ab0ca5a
RulenameCaramel Tsunami Actor IOC - July 2021
DescriptionIdentifies a match across IOC’s related to an actor tracked by Microsoft as Caramel Tsunami
SeverityHigh
TacticsPersistence
TechniquesT1546
Required data connectorsWindowsForwardedEvents
KindScheduled
Query frequency6h
Query period6h
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/CaramelTsunami_IOC_WindowsEvent.yaml
Version1.0.4
Arm template066395ac-ef91-4993-8bf6-25c61ab0ca5a.json
Deploy To Azure
let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/SOURGUM.csv"] with (format="csv", ignoreFirstRecord=True);
let file_path1 = (iocs | where Type =~ "filepath1" | project IoC);
let file_path2 = (iocs | where Type =~ "filepath2" | project IoC);
let file_path3 = (iocs | where Type =~ "filepath3" | project IoC);
let reg_key = (iocs | where Type =~ "regkey" | project IoC);
WindowsEvent
| where EventID == 4688 and (EventData has_any (file_path1) or EventData has_any (file_path2) or  EventData has_any (file_path3) or EventData has_any ('reg add') or EventData has_any (reg_key) )
| extend CommandLine = tostring(EventData.CommandLine)
| extend NewProcessName = tostring(EventData.NewProcessName)
| extend ParentProcessName = tostring(EventData.ParentProcessName)
| where (CommandLine has_any (file_path1)) or
  (CommandLine has_any (file_path3)) or
  (CommandLine has 'reg add' and CommandLine has_any (reg_key) and CommandLine has_any (file_path2)) or 
  (NewProcessName has_any (file_path1)) or
  (NewProcessName has_any (file_path3)) or
  (ParentProcessName has_any (file_path1)) or 
  (ParentProcessName has_any (file_path3)) 
| extend Account = strcat(EventData.SubjectDomainName,"\\", EventData.SubjectUserName)
| extend NewProcessId = tostring(EventData.NewProcessId)
| extend IP = tostring(EventData.IpAddress)
| project TimeGenerated, Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type, IP
| extend Alert = 'SOURGUM IOC detected'
| extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])
| extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
name: Caramel Tsunami Actor IOC - July 2021
status: Available
triggerThreshold: 0
severity: High
tactics:
- Persistence
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/CaramelTsunami_IOC_WindowsEvent.yaml
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: Account
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountNTDomain
    identifier: NTDomain
- entityType: Host
  fieldMappings:
  - columnName: Computer
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: HostNameDomain
    identifier: DnsDomain
- entityType: IP
  fieldMappings:
  - columnName: IP
    identifier: Address
- entityType: Process
  fieldMappings:
  - columnName: NewProcessId
    identifier: ProcessId
queryPeriod: 6h
queryFrequency: 6h
version: 1.0.4
triggerOperator: gt
description: |
    'Identifies a match across IOC's related to an actor tracked by Microsoft as Caramel Tsunami'
query: |
  let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/SOURGUM.csv"] with (format="csv", ignoreFirstRecord=True);
  let file_path1 = (iocs | where Type =~ "filepath1" | project IoC);
  let file_path2 = (iocs | where Type =~ "filepath2" | project IoC);
  let file_path3 = (iocs | where Type =~ "filepath3" | project IoC);
  let reg_key = (iocs | where Type =~ "regkey" | project IoC);
  WindowsEvent
  | where EventID == 4688 and (EventData has_any (file_path1) or EventData has_any (file_path2) or  EventData has_any (file_path3) or EventData has_any ('reg add') or EventData has_any (reg_key) )
  | extend CommandLine = tostring(EventData.CommandLine)
  | extend NewProcessName = tostring(EventData.NewProcessName)
  | extend ParentProcessName = tostring(EventData.ParentProcessName)
  | where (CommandLine has_any (file_path1)) or
    (CommandLine has_any (file_path3)) or
    (CommandLine has 'reg add' and CommandLine has_any (reg_key) and CommandLine has_any (file_path2)) or 
    (NewProcessName has_any (file_path1)) or
    (NewProcessName has_any (file_path3)) or
    (ParentProcessName has_any (file_path1)) or 
    (ParentProcessName has_any (file_path3)) 
  | extend Account = strcat(EventData.SubjectDomainName,"\\", EventData.SubjectUserName)
  | extend NewProcessId = tostring(EventData.NewProcessId)
  | extend IP = tostring(EventData.IpAddress)
  | project TimeGenerated, Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type, IP
  | extend Alert = 'SOURGUM IOC detected'
  | extend AccountName = tostring(split(Account, @'\')[1]), AccountNTDomain = tostring(split(Account, @'\')[0])
  | extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)  
relevantTechniques:
- T1546
id: 066395ac-ef91-4993-8bf6-25c61ab0ca5a
requiredDataConnectors:
- dataTypes:
  - WindowsEvent
  connectorId: WindowsForwardedEvents
tags:
- Caramel Tsunami
kind: Scheduled
{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/066395ac-ef91-4993-8bf6-25c61ab0ca5a')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/066395ac-ef91-4993-8bf6-25c61ab0ca5a')]",
      "properties": {
        "alertRuleTemplateName": "066395ac-ef91-4993-8bf6-25c61ab0ca5a",
        "customDetails": null,
        "description": "'Identifies a match across IOC's related to an actor tracked by Microsoft as Caramel Tsunami'\n",
        "displayName": "Caramel Tsunami Actor IOC - July 2021",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "Account",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountNTDomain",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IP",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "NewProcessId",
                "identifier": "ProcessId"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/CaramelTsunami_IOC_WindowsEvent.yaml",
        "query": "let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@\"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/SOURGUM.csv\"] with (format=\"csv\", ignoreFirstRecord=True);\nlet file_path1 = (iocs | where Type =~ \"filepath1\" | project IoC);\nlet file_path2 = (iocs | where Type =~ \"filepath2\" | project IoC);\nlet file_path3 = (iocs | where Type =~ \"filepath3\" | project IoC);\nlet reg_key = (iocs | where Type =~ \"regkey\" | project IoC);\nWindowsEvent\n| where EventID == 4688 and (EventData has_any (file_path1) or EventData has_any (file_path2) or  EventData has_any (file_path3) or EventData has_any ('reg add') or EventData has_any (reg_key) )\n| extend CommandLine = tostring(EventData.CommandLine)\n| extend NewProcessName = tostring(EventData.NewProcessName)\n| extend ParentProcessName = tostring(EventData.ParentProcessName)\n| where (CommandLine has_any (file_path1)) or\n  (CommandLine has_any (file_path3)) or\n  (CommandLine has 'reg add' and CommandLine has_any (reg_key) and CommandLine has_any (file_path2)) or \n  (NewProcessName has_any (file_path1)) or\n  (NewProcessName has_any (file_path3)) or\n  (ParentProcessName has_any (file_path1)) or \n  (ParentProcessName has_any (file_path3)) \n| extend Account = strcat(EventData.SubjectDomainName,\"\\\\\", EventData.SubjectUserName)\n| extend NewProcessId = tostring(EventData.NewProcessId)\n| extend IP = tostring(EventData.IpAddress)\n| project TimeGenerated, Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type, IP\n| extend Alert = 'SOURGUM IOC detected'\n| extend AccountName = tostring(split(Account, @'\\')[1]), AccountNTDomain = tostring(split(Account, @'\\')[0])\n| extend HostName = tostring(split(Computer, \".\")[0]), DomainIndex = toint(indexof(Computer, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)\n",
        "queryFrequency": "PT6H",
        "queryPeriod": "PT6H",
        "severity": "High",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Persistence"
        ],
        "tags": [
          "Caramel Tsunami"
        ],
        "techniques": [
          "T1546"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}