Chia_Crypto_Mining IOC - June 2021
| 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 |
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)
relevantTechniques:
- T1496
name: Chia_Crypto_Mining IOC - June 2021
requiredDataConnectors:
- dataTypes:
- WindowsEvent
connectorId: WindowsForwardedEvents
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: Account
- identifier: Name
columnName: AccountName
- identifier: NTDomain
columnName: AccountNTDomain
entityType: Account
- fieldMappings:
- identifier: FullName
columnName: Computer
- identifier: HostName
columnName: HostName
- identifier: DnsDomain
columnName: HostNameDomain
entityType: Host
- fieldMappings:
- identifier: Name
columnName: File
- identifier: Directory
columnName: FilePath
entityType: File
triggerThreshold: 0
id: 4d173248-439b-4741-8b37-f63ad0c896ae
tactics:
- Impact
version: 1.0.4
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/ChiaCryptoMining_WindowsEvent.yaml
queryPeriod: 6h
kind: Scheduled
tags:
- Chia
- version: 1.1.0
ParentAlert: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/ChiaCryptoMining.yaml
queryFrequency: 6h
severity: Low
status: Available
description: |
'Identifies a match across IOC's related to Chia cryptocurrency farming/plotting activity'
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)
triggerOperator: gt
{
"$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/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",
"subTechniques": [],
"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"
}
]
}