Detection rules › Kusto

[Deprecated] - Zinc Actor IOCs domains hashes IPs and useragent - October 2022

Status
available
Severity
high
Time window
6h
Source
github.com/Azure/Azure-Sentinel

'Use Microsoft's up-to-date Threat Intelligence solution from the Content Hub to replace the deprecated query with outdated IoCs. Install it from: https://learn.microsoft.com/azure/sentinel/sentinel-solutions-deploy'

MITRE ATT&CK coverage

TacticTechniques
PersistenceT1546 Event Triggered Execution

Rule body kusto

id: 95543d6d-f00d-4193-a63f-4edeefb7ec36
name: "[Deprecated] - Zinc Actor IOCs domains hashes IPs and useragent - October 2022"
description: | 
  'Use Microsoft's up-to-date Threat Intelligence solution from the Content Hub to replace the deprecated query with outdated IoCs. Install it from: https://learn.microsoft.com/azure/sentinel/sentinel-solutions-deploy'
severity: High 
status: Available
requiredDataConnectors: 
  - connectorId: DNS
    dataTypes:
      - DnsEvents
  - connectorId: AzureMonitor(VMInsights)
    dataTypes:
      - VMConnection
  - connectorId: F5
    dataTypes:
      - CommonSecurityLog
  - connectorId: CiscoASA
    dataTypes: 
      - CommonSecurityLog
  - connectorId: CiscoAsaAma
    dataTypes: 
      - CommonSecurityLog
  - connectorId: PaloAltoNetworks
    dataTypes: 
      - CommonSecurityLog
  - connectorId: Fortinet
    dataTypes: 
      - CommonSecurityLog
  - connectorId: CheckPoint
    dataTypes: 
      - CommonSecurityLog
  - connectorId: CEF
    dataTypes: 
      - CommonSecurityLog  
  - connectorId: CefAma
    dataTypes: 
      - CommonSecurityLog             
  - connectorId: MicrosoftThreatProtection
    dataTypes:
      - DeviceNetworkEvents
      - DeviceFileEvents
      - DeviceEvents
      - DeviceProcessEvents
  - connectorId: SecurityEvents
    dataTypes:
      - SecurityEvent
  - connectorId: Office365
    dataTypes:
      - OfficeActivity
  - connectorId: AzureFirewall
    dataTypes: 
      - AzureDiagnostics
  - connectorId: WindowsFirewall
    dataTypes:
      - WindowsFirewall
  - connectorId: WindowsFirewallAma
    dataTypes:
      - WindowsFirewall
  - connectorId: WindowsSecurityEvents
    dataTypes: 
      - SecurityEvents 
  - connectorId: WindowsForwardedEvents
    dataTypes: 
      - WindowsEvent             
queryFrequency: 6h 
queryPeriod: 6h 
triggerOperator: gt 
triggerThreshold: 0 
tactics: 
  - Persistence
relevantTechniques:
  - T1546
tags:
  - Zinc
query:  |
  let iocs = externaldata(DateAdded:string,IoC:string,Type:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/ZincOctober2022IOCs.csv"] with (format="csv", ignoreFirstRecord=True);
  let domains = (iocs | where Type =~ "domainname"| project IoC);
  let IPList = (iocs | where Type =~ "ip"| project IoC);
  let sha256Hashes = (iocs | where Type =~ "sha256" | project IoC);
  let useragents = (iocs | where Type =~ "useragent" | project IoC);
  (union isfuzzy=true
  (CommonSecurityLog
  | where DestinationHostName has_any (domains) or RequestURL has_any (domains) or Message has_any (domains) or  SourceIP has_any (IPList) or DestinationIP  has_any (IPList)
  | parse Message with * '(' DNSName ')' *
  | project TimeGenerated, Message, SourceUserID, RequestURL, DestinationHostName, Type, SourceIP, DestinationIP, DNSName
  | extend timestamp = TimeGenerated, AccountEntity = SourceUserID, UrlEntity = RequestURL , IPEntity = DestinationIP, DNSCustomEntity = DNSName
  ),
  (DnsEvents
  | where Name in~ (domains) or IPAddresses has_any (IPList)
  | project TimeGenerated, Computer, IPAddresses, Name, ClientIP, Type
  | extend DNSName = Name, Host = Computer
  | extend timestamp = TimeGenerated, HostEntity = Host, DNSCustomEntity = DNSName, IPEntity = IPAddresses
  ),
  (VMConnection
  | where  RemoteDnsCanonicalNames has_any (domains)  or  SourceIp has_any (IPList) or DestinationIp has_any (IPList)
  | parse RemoteDnsCanonicalNames with * '["' DNSName '"]' *
  | project TimeGenerated, Computer, Direction, RemoteDnsCanonicalNames, ProcessName, SourceIp, DestinationIp, DestinationPort, DNSName,BytesSent, BytesReceived, RemoteCountry, Type
  | extend timestamp = TimeGenerated, IPEntity = DestinationIp, HostEntity = Computer, ProcessEntity = ProcessName, DNSCustomEntity = DNSName
  ),
  (Event
  | where Source =~ "Microsoft-Windows-Sysmon"
  | where EventID == 3
  | extend EvData = parse_xml(EventData)
  | extend EventDetail = EvData.DataItem.EventData.Data
  | extend SourceIP = tostring(EventDetail.[9].["#text"]), DestinationIP = tostring(EventDetail.[14].["#text"]), Image = EventDetail.[4].["#text"]
  | where  SourceIP has_any (IPList) or DestinationIP has_any (IPList)
  | project TimeGenerated, SourceIP, DestinationIP, Image, UserName, Computer, EventDetail, Type
  | extend timestamp = TimeGenerated, AccountEntity = UserName, ProcessEntity = tostring(split(Image, '\\', -1)[-1]), HostEntity = Computer , IPEntity = DestinationIP
  ),  
  (DeviceNetworkEvents
  | where RemoteUrl has_any (domains) or RemoteIP has_any (IPList) or InitiatingProcessSHA256 in (sha256Hashes) 
  | project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RemoteIP, RemoteUrl, LocalIP, Type
  | extend timestamp = TimeGenerated, IPEntity = RemoteIP, HostEntity = DeviceName, UrlEntity =RemoteUrl
  ),
  (AzureDiagnostics
  | where ResourceType =~ "AZUREFIREWALLS"
  | where Category =~ "AzureFirewallDnsProxy"
  | project TimeGenerated,Resource, msg_s, Type
  | parse msg_s with "DNS Request: " ClientIP ":" ClientPort " - " QueryID " " Request_Type " " Request_Class " " Request_Name ". " Request_Protocol " " Request_Size " " EDNSO_DO " " EDNS0_Buffersize " " Responce_Code " " Responce_Flags " " Responce_Size " " Response_Duration
  | where Request_Name has_any (domains) or ClientIP has_any (IPList)
  | extend timestamp = TimeGenerated, DNSName = Request_Name, IPEntity = ClientIP
  ),
  (AzureDiagnostics
  | where ResourceType =~ "AZUREFIREWALLS"
  | where Category =~ "AzureFirewallApplicationRule"
  | project TimeGenerated,Resource, msg_s
  | parse msg_s with Protocol 'request from ' SourceHost ':' SourcePort 'to ' DestinationHost ':' DestinationPort '. Action:' Action
  | where DestinationHost has_any (domains) or SourceHost has_any (IPList)
  | extend timestamp = TimeGenerated, DNSName = DestinationHost, IPEntity = SourceHost
  ),
  (Event
  | where Source =~ "Microsoft-Windows-Sysmon"
  | where EventID == 1
  | extend EvData = parse_xml(EventData)
  | extend EventDetail = EvData.DataItem.EventData.Data
  | parse EventDetail with * 'SHA256=' SHA256 '",' *
  | extend Image = EventDetail.[4].["#text"],  CommandLine = EventDetail.[10].["#text"]
  | where SHA256 has_any (sha256Hashes)
  | project TimeGenerated, EventDetail, UserName, Computer, Type, Source, SHA256, CommandLine, Image
  | extend Type = strcat(Type, ": ", Source)
  | extend timestamp = TimeGenerated, HostEntity = Computer , AccountEntity = UserName, ProcessEntity = tostring(split(Image, '\\', -1)[-1]), AlgorithmEntity = "SHA256", FileHashEntity = SHA256
  ),  
  (DeviceProcessEvents
  | where  InitiatingProcessSHA256 has_any (sha256Hashes)
  | project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, FolderPath, Type
  | extend timestamp = TimeGenerated, HostEntity = DeviceName , AccountEntity = InitiatingProcessAccountName, ProcessEntity = InitiatingProcessFileName, AlgorithmEntity = "SHA256", FileHashEntity = InitiatingProcessSHA256
  ),
  (DeviceFileEvents
  | where  InitiatingProcessSHA256 has_any (sha256Hashes)
  | project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RequestAccountName, RequestSourceIP, InitiatingProcessSHA256, FolderPath, Type
  | extend timestamp = TimeGenerated, HostEntity = DeviceName , AccountEntity = RequestAccountName, ProcessEntity = InitiatingProcessFileName, AlgorithmEntity = "SHA256", FileHashEntity = InitiatingProcessSHA256
  ),
  (DeviceEvents
  | where  InitiatingProcessSHA256 has_any (sha256Hashes)
  | project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, FolderPath, Type
  | extend CommandLine = InitiatingProcessCommandLine
  | extend timestamp = TimeGenerated, HostEntity = DeviceName , AccountEntity = InitiatingProcessAccountName, ProcessEntity = InitiatingProcessFileName, AlgorithmEntity = "SHA256", FileHashEntity = InitiatingProcessSHA256
  ),
  (OfficeActivity
  | where ClientIP has_any (IPList) or UserAgent has_any (useragents)
  | project TimeGenerated, UserAgent, Operation, RecordType, UserId, ClientIP, Type
  | extend timestamp = TimeGenerated, IPEntity = ClientIP, AccountEntity = UserId
  )
  )
  | extend HostName = tostring(split(HostEntity, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(HostEntity, '.'), 1, -1), '.'))
  | extend Name = tostring(split(AccountEntity, '@', 0)[0]), UPNSuffix = tostring(split(AccountEntity, '@', 1)[0])
entityMappings:
  - entityType: Account
    fieldMappings:
      - identifier: Name
        columnName: Name
      - identifier: UPNSuffix
        columnName: UPNSuffix
  - entityType: Host
    fieldMappings:
      - identifier: HostName
        columnName: HostName
      - identifier: DnsDomain
        columnName: DnsDomain
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: IPEntity 
  - entityType: Process
    fieldMappings:
      - identifier: ProcessId
        columnName: ProcessEntity
  - entityType: FileHash
    fieldMappings:
      - identifier: Algorithm
        columnName: AlgorithmEntity
      - identifier: Value
        columnName: FileHashEntity        
version: 1.0.4
kind: Scheduled

Stages and Predicates

Let binding: iocs

let iocs = externaldata(DateAdded:string,IoC:string,Type:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/ZincOctober2022IOCs.csv"] with (format="csv", ignoreFirstRecord=True);

Let binding: domains

let domains = (iocs | where Type =~ "domainname"| project IoC);

Derived from iocs.

Let binding: IPList

let IPList = (iocs | where Type =~ "ip"| project IoC);

Derived from iocs.

Let binding: sha256Hashes

let sha256Hashes = (iocs | where Type =~ "sha256" | project IoC);

Derived from iocs.

Let binding: useragents

let useragents = (iocs | where Type =~ "useragent" | project IoC);

Derived from iocs.

union isfuzzy=true (12 sources)

Each leg below queries one source; the rule matches if any leg does. Sources: CommonSecurityLog, DnsEvents, VMConnection, Event, DeviceNetworkEvents, AzureDiagnostics, AzureDiagnostics, Event, DeviceProcessEvents, DeviceFileEvents, DeviceEvents, OfficeActivity

Leg 1: CommonSecurityLog

CommonSecurityLog
| where DestinationHostName has_any (domains) or RequestURL has_any (domains) or Message has_any (domains) or  SourceIP has_any (IPList) or DestinationIP  has_any (IPList)
| parse Message with * '(' DNSName ')' *
| project TimeGenerated, Message, SourceUserID, RequestURL, DestinationHostName, Type, SourceIP, DestinationIP, DNSName
| extend timestamp = TimeGenerated, AccountEntity = SourceUserID, UrlEntity = RequestURL , IPEntity = DestinationIP, DNSCustomEntity = DNSName

Leg 2: DnsEvents

DnsEvents
| where Name in~ (domains) or IPAddresses has_any (IPList)
| project TimeGenerated, Computer, IPAddresses, Name, ClientIP, Type
| extend DNSName = Name, Host = Computer
| extend timestamp = TimeGenerated, HostEntity = Host, DNSCustomEntity = DNSName, IPEntity = IPAddresses

Leg 3: VMConnection

VMConnection
| where  RemoteDnsCanonicalNames has_any (domains)  or  SourceIp has_any (IPList) or DestinationIp has_any (IPList)
| parse RemoteDnsCanonicalNames with * '["' DNSName '"]' *
| project TimeGenerated, Computer, Direction, RemoteDnsCanonicalNames, ProcessName, SourceIp, DestinationIp, DestinationPort, DNSName,BytesSent, BytesReceived, RemoteCountry, Type
| extend timestamp = TimeGenerated, IPEntity = DestinationIp, HostEntity = Computer, ProcessEntity = ProcessName, DNSCustomEntity = DNSName

Leg 4: Event

Event
| where Source =~ "Microsoft-Windows-Sysmon"
| where EventID == 3
| extend EvData = parse_xml(EventData)
| extend EventDetail = EvData.DataItem.EventData.Data
| extend SourceIP = tostring(EventDetail.[9].["#text"]), DestinationIP = tostring(EventDetail.[14].["#text"]), Image = EventDetail.[4].["#text"]
| where  SourceIP has_any (IPList) or DestinationIP has_any (IPList)
| project TimeGenerated, SourceIP, DestinationIP, Image, UserName, Computer, EventDetail, Type
| extend timestamp = TimeGenerated, AccountEntity = UserName, ProcessEntity = tostring(split(Image, '\\', -1)[-1]), HostEntity = Computer , IPEntity = DestinationIP

Leg 5: DeviceNetworkEvents

DeviceNetworkEvents
| where RemoteUrl has_any (domains) or RemoteIP has_any (IPList) or InitiatingProcessSHA256 in (sha256Hashes) 
| project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RemoteIP, RemoteUrl, LocalIP, Type
| extend timestamp = TimeGenerated, IPEntity = RemoteIP, HostEntity = DeviceName, UrlEntity =RemoteUrl

Leg 6: AzureDiagnostics

AzureDiagnostics
| where ResourceType =~ "AZUREFIREWALLS"
| where Category =~ "AzureFirewallDnsProxy"
| project TimeGenerated,Resource, msg_s, Type
| parse msg_s with "DNS Request: " ClientIP ":" ClientPort " - " QueryID " " Request_Type " " Request_Class " " Request_Name ". " Request_Protocol " " Request_Size " " EDNSO_DO " " EDNS0_Buffersize " " Responce_Code " " Responce_Flags " " Responce_Size " " Response_Duration
| where Request_Name has_any (domains) or ClientIP has_any (IPList)
| extend timestamp = TimeGenerated, DNSName = Request_Name, IPEntity = ClientIP

Leg 7: AzureDiagnostics

AzureDiagnostics
| where ResourceType =~ "AZUREFIREWALLS"
| where Category =~ "AzureFirewallApplicationRule"
| project TimeGenerated,Resource, msg_s
| parse msg_s with Protocol 'request from ' SourceHost ':' SourcePort 'to ' DestinationHost ':' DestinationPort '. Action:' Action
| where DestinationHost has_any (domains) or SourceHost has_any (IPList)
| extend timestamp = TimeGenerated, DNSName = DestinationHost, IPEntity = SourceHost

Leg 8: Event

Event
| where Source =~ "Microsoft-Windows-Sysmon"
| where EventID == 1
| extend EvData = parse_xml(EventData)
| extend EventDetail = EvData.DataItem.EventData.Data
| parse EventDetail with * 'SHA256=' SHA256 '",' *
| extend Image = EventDetail.[4].["#text"],  CommandLine = EventDetail.[10].["#text"]
| where SHA256 has_any (sha256Hashes)
| project TimeGenerated, EventDetail, UserName, Computer, Type, Source, SHA256, CommandLine, Image
| extend Type = strcat(Type, ": ", Source)
| extend timestamp = TimeGenerated, HostEntity = Computer , AccountEntity = UserName, ProcessEntity = tostring(split(Image, '\\', -1)[-1]), AlgorithmEntity = "SHA256", FileHashEntity = SHA256

Leg 9: DeviceProcessEvents

DeviceProcessEvents
| where  InitiatingProcessSHA256 has_any (sha256Hashes)
| project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, FolderPath, Type
| extend timestamp = TimeGenerated, HostEntity = DeviceName , AccountEntity = InitiatingProcessAccountName, ProcessEntity = InitiatingProcessFileName, AlgorithmEntity = "SHA256", FileHashEntity = InitiatingProcessSHA256

Leg 10: DeviceFileEvents

DeviceFileEvents
| where  InitiatingProcessSHA256 has_any (sha256Hashes)
| project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RequestAccountName, RequestSourceIP, InitiatingProcessSHA256, FolderPath, Type
| extend timestamp = TimeGenerated, HostEntity = DeviceName , AccountEntity = RequestAccountName, ProcessEntity = InitiatingProcessFileName, AlgorithmEntity = "SHA256", FileHashEntity = InitiatingProcessSHA256

Leg 11: DeviceEvents

DeviceEvents
| where  InitiatingProcessSHA256 has_any (sha256Hashes)
| project TimeGenerated, ActionType, DeviceId, DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, FolderPath, Type
| extend CommandLine = InitiatingProcessCommandLine
| extend timestamp = TimeGenerated, HostEntity = DeviceName , AccountEntity = InitiatingProcessAccountName, ProcessEntity = InitiatingProcessFileName, AlgorithmEntity = "SHA256", FileHashEntity = InitiatingProcessSHA256

Leg 12: OfficeActivity

OfficeActivity
| where ClientIP has_any (IPList) or UserAgent has_any (useragents)
| project TimeGenerated, UserAgent, Operation, RecordType, UserId, ClientIP, Type
| extend timestamp = TimeGenerated, IPEntity = ClientIP, AccountEntity = UserId

Applied to the combined result

| extend HostName = tostring(split(HostEntity, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(HostEntity, '.'), 1, -1), '.'))
| extend Name = tostring(split(AccountEntity, '@', 0)[0]), UPNSuffix = tostring(split(AccountEntity, '@', 1)[0])

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Categoryeq
  • AzureFirewallApplicationRule
  • AzureFirewallDnsProxy
ClientIPmatch
  • IPList
DestinationHostmatch
  • domains
DestinationHostNamematch
  • domains
DestinationIPmatch
  • IPList
DestinationIpmatch
  • IPList
EventIDeq
  • 1 transforms: cased
  • 3 transforms: cased
IPAddressesmatch
  • IPList
InitiatingProcessSHA256in
  • sha256Hashes transforms: cased
InitiatingProcessSHA256match
  • sha256Hashes
Messagematch
  • domains
Namein
  • domains
RemoteDnsCanonicalNamesmatch
  • domains
RemoteIPmatch
  • IPList
RemoteUrlmatch
  • domains
RequestURLmatch
  • domains
Request_Namematch
  • domains
ResourceTypeeq
  • AZUREFIREWALLS
SHA256match
  • sha256Hashes
SourceHostmatch
  • IPList
SourceIPmatch
  • IPList
SourceIpmatch
  • IPList
UserAgentmatch
  • useragents

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

FieldSource
ClientIPproject
Operationproject
RecordTypeproject
TimeGeneratedproject
Typeproject
UserAgentproject
UserIdproject
AccountEntityextend
IPEntityextend
timestampextend
DnsDomainextend
HostNameextend
Nameextend
UPNSuffixextend