Chia_Crypto_Mining IOC - June 2021

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Id	4d173248-439b-4741-8b37-f63ad0c896ae
Rulename	Chia_Crypto_Mining IOC - June 2021
Description	Identifies a match across IOC’s related to Chia cryptocurrency farming/plotting activity
Severity	Low
Tactics	Impact
Techniques	T1496
Required data connectors	WindowsForwardedEvents
Kind	Scheduled
Query frequency	6h
Query period	6h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/ChiaCryptoMining_WindowsEvent.yaml
Version	1.0.4
Arm template	4d173248-439b-4741-8b37-f63ad0c896ae.json

KQL

let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/ChiaCryptoIOC.csv"] with (format="csv", ignoreFirstRecord=True);
let process = (iocs | where Type =~ "process" | project IoC);
//This query uses sysmon data, sections that have - | where Source == "Microsoft-Windows-Sysmon" - may need to be updated with latest
WindowsEvent
| where EventID == '4688' and EventData has_any (process)
| extend NewProcessName = tostring(EventData.NewProcessName)
| where NewProcessName  has_any (process)
| extend ParentProcessName = tostring(EventData.ParentProcessName)
  , Account =  strcat(tostring(EventData.SubjectDomainName),"\\", tostring(EventData.SubjectUserName))
  , NewProcessId = tostring(EventData.NewProcessId)
| extend Computer, Account, File = tostring(split(NewProcessName, '\\', -1)[-1]), AlertDetail = 'Chia crypto IOC detected'
| extend FilePath = replace_string(NewProcessName, File, '')
| project TimeGenerated, File, AlertDetail, FilePath,Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type
| 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)

YAML

id: 4d173248-439b-4741-8b37-f63ad0c896ae
requiredDataConnectors:
- dataTypes:
  - WindowsEvent
  connectorId: WindowsForwardedEvents
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/ChiaCryptoMining_WindowsEvent.yaml
relevantTechniques:
- T1496
kind: Scheduled
name: Chia_Crypto_Mining IOC - June 2021
queryFrequency: 6h
query: |
  let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/ChiaCryptoIOC.csv"] with (format="csv", ignoreFirstRecord=True);
  let process = (iocs | where Type =~ "process" | project IoC);
  //This query uses sysmon data, sections that have - | where Source == "Microsoft-Windows-Sysmon" - may need to be updated with latest
  WindowsEvent
  | where EventID == '4688' and EventData has_any (process)
  | extend NewProcessName = tostring(EventData.NewProcessName)
  | where NewProcessName  has_any (process)
  | extend ParentProcessName = tostring(EventData.ParentProcessName)
    , Account =  strcat(tostring(EventData.SubjectDomainName),"\\", tostring(EventData.SubjectUserName))
    , NewProcessId = tostring(EventData.NewProcessId)
  | extend Computer, Account, File = tostring(split(NewProcessName, '\\', -1)[-1]), AlertDetail = 'Chia crypto IOC detected'
  | extend FilePath = replace_string(NewProcessName, File, '')
  | project TimeGenerated, File, AlertDetail, FilePath,Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type
  | 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)  
severity: Low
tags:
- Chia
- version: 1.1.0
  ParentAlert: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/ChiaCryptoMining.yaml
triggerThreshold: 0
tactics:
- Impact
entityMappings:
- fieldMappings:
  - columnName: Account
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountNTDomain
    identifier: NTDomain
  entityType: Account
- fieldMappings:
  - columnName: Computer
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: HostNameDomain
    identifier: DnsDomain
  entityType: Host
- fieldMappings:
  - columnName: File
    identifier: Name
  - columnName: FilePath
    identifier: Directory
  entityType: File
version: 1.0.4
queryPeriod: 6h
description: |
    'Identifies a match across IOC's related to Chia cryptocurrency farming/plotting activity'
status: Available

ARM

{
  "$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/4d173248-439b-4741-8b37-f63ad0c896ae')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4d173248-439b-4741-8b37-f63ad0c896ae')]",
      "properties": {
        "alertRuleTemplateName": "4d173248-439b-4741-8b37-f63ad0c896ae",
        "customDetails": null,
        "description": "'Identifies a match across IOC's related to Chia cryptocurrency farming/plotting activity'\n",
        "displayName": "Chia_Crypto_Mining IOC - June 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": "File",
            "fieldMappings": [
              {
                "columnName": "File",
                "identifier": "Name"
              },
              {
                "columnName": "FilePath",
                "identifier": "Directory"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/ChiaCryptoMining_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/ChiaCryptoIOC.csv\"] with (format=\"csv\", ignoreFirstRecord=True);\nlet process = (iocs | where Type =~ \"process\" | project IoC);\n//This query uses sysmon data, sections that have - | where Source == \"Microsoft-Windows-Sysmon\" - may need to be updated with latest\nWindowsEvent\n| where EventID == '4688' and EventData has_any (process)\n| extend NewProcessName = tostring(EventData.NewProcessName)\n| where NewProcessName  has_any (process)\n| extend ParentProcessName = tostring(EventData.ParentProcessName)\n  , Account =  strcat(tostring(EventData.SubjectDomainName),\"\\\\\", tostring(EventData.SubjectUserName))\n  , NewProcessId = tostring(EventData.NewProcessId)\n| extend Computer, Account, File = tostring(split(NewProcessName, '\\\\', -1)[-1]), AlertDetail = 'Chia crypto IOC detected'\n| extend FilePath = replace_string(NewProcessName, File, '')\n| project TimeGenerated, File, AlertDetail, FilePath,Computer, NewProcessName, ParentProcessName, Account, NewProcessId, Type\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": "Low",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "tags": [
          "Chia",
          {
            "ParentAlert": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/ChiaCryptoMining.yaml",
            "version": "1.1.0"
          }
        ],
        "techniques": [
          "T1496"
        ],
        "templateVersion": "1.0.4",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}