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)
description: |
'Identifies a match across IOC's related to Chia cryptocurrency farming/plotting activity'
kind: Scheduled
tactics:
- Impact
requiredDataConnectors:
- connectorId: WindowsForwardedEvents
dataTypes:
- WindowsEvent
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Windows Forwarded Events/Analytic Rules/ChiaCryptoMining_WindowsEvent.yaml
severity: Low
name: Chia_Crypto_Mining IOC - June 2021
triggerThreshold: 0
queryPeriod: 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)
relevantTechniques:
- T1496
id: 4d173248-439b-4741-8b37-f63ad0c896ae
queryFrequency: 6h
status: Available
triggerOperator: gt
version: 1.0.4
tags:
- Chia
- ParentAlert: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/ChiaCryptoMining.yaml
version: 1.1.0
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
