Mercury - Domain Hash and IP IOCs - August 2022

let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/Mercury_August2022.csv"] with (format="csv", ignoreFirstRecord=True);
let sha256Hashes = (iocs | where Type =~ "sha256" | project IoC);
let IPList = (iocs | where Type =~ "ip"| project IoC);
let domains = (iocs | where Type =~ "domainname"| project IoC);
let IPRegex = '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}';
(union isfuzzy=true
(CommonSecurityLog
| where SourceIP in (IPList) or DestinationIP in (IPList) or DestinationHostName has_any (domains) or RequestURL has_any (domains) or Message has_any (IPList)
| parse Message with * '(' DNSName ')' * 
| project TimeGenerated, SourceIP, DestinationIP, Message, SourceUserID, RequestURL, DNSName, Type
| extend MessageIP = extract(IPRegex, 0, Message), RequestIP = extract(IPRegex, 0, RequestURL)
| extend IPMatch = case(SourceIP in (IPList), "SourceIP", DestinationIP in (IPList), "DestinationIP", MessageIP in (IPList), "Message", RequestURL has_any (domains), "RequestUrl", "NoMatch")
| extend IPAddress = case(IPMatch == "SourceIP", SourceIP, IPMatch == "DestinationIP", DestinationIP, IPMatch == "Message", MessageIP, "NoMatch")
| extend AccountName = tostring(split(SourceUserID, "@")[0]), AccountUPNSuffix = tostring(split(SourceUserID, "@")[1])
),
(DnsEvents
| where IPAddresses in (IPList) or Name in~ (domains)
| project TimeGenerated, Computer, IPAddresses, Name, ClientIP, Type
| extend IPAddress = IPAddresses, DNSName = Name, Computer
),
(VMConnection
| where SourceIp in (IPList) or DestinationIp in (IPList) or RemoteDnsCanonicalNames has_any (domains)
| parse RemoteDnsCanonicalNames with * '["' DNSName '"]' *
| project TimeGenerated, Computer, Direction, ProcessName, SourceIp, DestinationIp, DestinationPort, RemoteDnsQuestions, DNSName,BytesSent, BytesReceived, RemoteCountry, Type
| extend IPMatch = case( SourceIp in (IPList), "SourceIP", DestinationIp in (IPList), "DestinationIP", "None") 
| extend IPAddress = case(IPMatch == "SourceIP", SourceIp, IPMatch == "DestinationIP", DestinationIp, "NoMatch"), File = ProcessName
),
(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 = tostring(EventDetail.[4].["#text"])
| where SourceIP in (IPList) or DestinationIP in (IPList)
| project TimeGenerated, SourceIP, DestinationIP, Image, UserName, Computer, Type
| extend IPMatch = case( SourceIP in (IPList), "SourceIP", DestinationIP in (IPList), "DestinationIP", "None")
| extend AccountNT = UserName, File = tostring(split(Image, '\\', -1)[-1]), IPAddress = case(IPMatch == "SourceIP", SourceIP, IPMatch == "DestinationIP", DestinationIP, "None")
), 
(OfficeActivity
| where ClientIP in (IPList) 
| project TimeGenerated, UserAgent, Operation, RecordType, UserId, ClientIP, Type
| extend IPAddress = ClientIP, AccountUPN = UserId, AccountUPNName = tostring(split(UserId, "@")[0]), AccountUPNSuffix = tostring(split(UserId, "@")[1])
),
(DeviceNetworkEvents
| where RemoteUrl has_any (domains) or RemoteIP in (IPList) or InitiatingProcessSHA256 in (sha256Hashes)
| project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessSHA256, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RemoteIP, RemoteUrl, RemotePort, LocalIP, Type
| extend IPAddress = RemoteIP, FileHash = InitiatingProcessSHA256
| extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, "@")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, "@")[1])
),
(WindowsFirewall
| where SourceIP in (IPList) or DestinationIP in (IPList) 
| project TimeGenerated, Computer, CommunicationDirection, SourceIP, DestinationIP, SourcePort, DestinationPort, Type
| extend IPMatch = case( SourceIP in (IPList), "SourceIP", DestinationIP in (IPList), "DestinationIP", "None")
| extend IPAddress = case(IPMatch == "SourceIP", SourceIP, IPMatch == "DestinationIP", DestinationIP, "None")
),
(AzureDiagnostics 
| where ResourceType == "AZUREFIREWALLS"
| where Category == "AzureFirewallApplicationRule"
| parse msg_s with Protocol 'request from ' SourceHost ':' SourcePort 'to ' DestinationHost ':' DestinationPort '. Action:' Action
| where isnotempty(DestinationHost)
| where DestinationHost has_any (IPList) or DestinationHost has_any (domains) 
| extend DNSName = DestinationHost, IPAddress = SourceHost
),
(AzureDiagnostics
| where ResourceType == "AZUREFIREWALLS"
| where Category == "AzureFirewallNetworkRule"
| where msg_s has_any (IPList)
| parse msg_s with Protocol " request from " SourceIP ":" SourcePortInt:int " to " TargetIP ":" TargetPortInt:int *
| parse kind=regex flags=U msg_s with * ". Action\\: " Action1a "\\."
| parse msg_s with * ". Policy: " Policy ". Rule Collection Group: " RuleCollectionGroup "." *
| parse msg_s with * " Rule Collection: "  RuleCollection ". Rule: " Rule 
| extend IPAddress = SourceIP
),
(AzureDiagnostics
| where ResourceType == "AZUREFIREWALLS"
| where Category == "AzureFirewallDnsProxy"
| where msg_s has_any (domains)
| parse msg_s with "DNS Request: " SourceIP ":" SourcePortInt:int " - " QueryID:int " " RequestType " " RequestClass " " hostname ". " protocol " " details
| extend
    ResponseDuration = extract("[0-9]*.?[0-9]+s$", 0, msg_s),
    SourcePort = tostring(SourcePortInt),
    QueryID = tostring(QueryID)
| project TimeGenerated,SourceIP,hostname,RequestType,ResponseDuration,details,msg_s
| extend IPAddress = SourceIP
),
(AZFWApplicationRule
| where Fqdn has_any (domains) or Fqdn has_any (IPList)
| extend IPAddress = SourceIp
),
(AZFWDnsQuery
| where isnotempty(QueryName)
| where QueryName has_any (domains)
| extend DNSName = QueryName, IPAddress = SourceIp
),
(AZFWNetworkRule
| where DestinationIp has_any (IPList)
| extend IPAddress = SourceIp
),
(CommonSecurityLog
| where FileHash in (sha256Hashes)
| project TimeGenerated, Message, SourceUserID, FileHash, Type
| extend Algorithm = "SHA256", FileHash = tostring(FileHash), AccountUPN = SourceUserID, AccountUPNName = tostring(split(SourceUserID, "@")[0]), AccountUPNSuffix = tostring(split(SourceUserID, "@")[1])
),
(imFileEvent
| where TargetFileSHA256 has_any (sha256Hashes)
| extend AccountNT = ActorUsername, Computer = DvcHostname, IPAddress = SrcIpAddr, CommandLine = ActingProcessCommandLine, FileHash = TargetFileSHA256
| project Type, TimeGenerated, Computer, AccountNT, IPAddress, CommandLine, FileHash, Algorithm = "SHA256"
),
(DeviceFileEvents
| where SHA256 has_any (sha256Hashes)
| project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, Type
| extend Algorithm = "SHA256", FileHash = tostring(InitiatingProcessSHA256), CommandLine = InitiatingProcessCommandLine,Image = InitiatingProcessFolderPath
| extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, "@")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, "@")[1])
),
(DeviceImageLoadEvents
| where SHA256 has_any (sha256Hashes)
| project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, Type
| extend Algorithm = "SHA256", FileHash = tostring(InitiatingProcessSHA256), CommandLine = InitiatingProcessCommandLine,Image = InitiatingProcessFolderPath
| extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, "@")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, "@")[1])
),
(Event
| where Source =~ "Microsoft-Windows-Sysmon"
| where EventID == 1
| extend EvData = parse_xml(EventData)
| extend EventDetail = EvData.DataItem.EventData.Data
| extend Image = EventDetail.[4].["#text"], CommandLine = EventDetail.[10].["#text"], Hashes = tostring(EventDetail.[17].["#text"])
| extend Hashes = extract_all(@"(?P<key>\w+)=(?P<value>[a-zA-Z0-9]+)", dynamic(["key","value"]), Hashes)
| extend Hashes = column_ifexists("Hashes", dynamic(["", ""])), CommandLine = column_ifexists("CommandLine", "")
| mv-expand Hashes
| where Hashes[0] =~ "SHA256" and Hashes[1] has_any (sha256Hashes) 
| project TimeGenerated, EventDetail, AccountNT = UserName, Computer, Type, Source, Hashes, CommandLine, Image
| extend Type = strcat(Type, ": ", Source), FileHash = tostring(Hashes[1]), Algorithm = tostring(Hashes[0])
)
)
| extend AccountNTName = tostring(split(AccountNT, "\\")[1]), AccountNTDomain = tostring(split(AccountNT, "\\")[0])
| extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
| project-away DomainIndex

relevantTechniques:
- T1071
name: Mercury - Domain, Hash and IP IOCs - August 2022
requiredDataConnectors:
- dataTypes:
  - DnsEvents
  connectorId: DNS
- dataTypes:
  - VMConnection
  connectorId: AzureMonitor(VMInsights)
- dataTypes:
  - CommonSecurityLog
  connectorId: F5
- dataTypes:
  - CommonSecurityLog
  connectorId: CiscoASA
- dataTypes:
  - CommonSecurityLog
  connectorId: PaloAltoNetworks
- dataTypes:
  - CommonSecurityLog
  connectorId: Fortinet
- dataTypes:
  - CommonSecurityLog
  connectorId: CheckPoint
- dataTypes:
  - CommonSecurityLog
  connectorId: CEF
- dataTypes:
  - DeviceNetworkEvents
  - DeviceFileEvents
  - DeviceImageLoadEvents
  connectorId: MicrosoftThreatProtection
- dataTypes:
  - OfficeActivity
  connectorId: Office365
- dataTypes:
  - AzureDiagnostics
  - AZFWApplicationRule
  - AZFWDnsQuery
  connectorId: AzureFirewall
- dataTypes:
  - WindowsFirewall
  connectorId: WindowsFirewall
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: AccountUPN
  - identifier: Name
    columnName: AccountUPNName
  - identifier: UPNSuffix
    columnName: AccountUPNSuffix
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: AccountNT
  - identifier: Name
    columnName: AccountNTName
  - identifier: UPNSuffix
    columnName: AccountNTDomain
  entityType: Account
- fieldMappings:
  - identifier: FullName
    columnName: Computer
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
  entityType: Host
- fieldMappings:
  - identifier: Address
    columnName: IPAddress
  entityType: IP
- fieldMappings:
  - identifier: Algorithm
    columnName: Algorithm
  - identifier: Value
    columnName: FileHash
  entityType: FileHash
triggerThreshold: 0
id: ae10c588-7ff7-486c-9920-ab8b0bdb6ede
tactics:
- CommandAndControl
version: 1.1.1
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/Mercury_Log4j_August2022.yaml
queryPeriod: 12h
kind: Scheduled
tags:
- Mercury
- Schema: ASIMFileEvent
  SchemaVersion: 0.1.0
metadata:
  categories:
    domains:
    - Security - Threat Intelligence
  author:
    name: Ajeet Prakash
  support:
    tier: Community
  source:
    kind: Community
queryFrequency: 12h
severity: High
description: |
  'Identifies a match across various data feeds for domains, hashes and IP IOC related to Mercury
   Reference:  https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/'  
query: |
  let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/Mercury_August2022.csv"] with (format="csv", ignoreFirstRecord=True);
  let sha256Hashes = (iocs | where Type =~ "sha256" | project IoC);
  let IPList = (iocs | where Type =~ "ip"| project IoC);
  let domains = (iocs | where Type =~ "domainname"| project IoC);
  let IPRegex = '[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}';
  (union isfuzzy=true
  (CommonSecurityLog
  | where SourceIP in (IPList) or DestinationIP in (IPList) or DestinationHostName has_any (domains) or RequestURL has_any (domains) or Message has_any (IPList)
  | parse Message with * '(' DNSName ')' * 
  | project TimeGenerated, SourceIP, DestinationIP, Message, SourceUserID, RequestURL, DNSName, Type
  | extend MessageIP = extract(IPRegex, 0, Message), RequestIP = extract(IPRegex, 0, RequestURL)
  | extend IPMatch = case(SourceIP in (IPList), "SourceIP", DestinationIP in (IPList), "DestinationIP", MessageIP in (IPList), "Message", RequestURL has_any (domains), "RequestUrl", "NoMatch")
  | extend IPAddress = case(IPMatch == "SourceIP", SourceIP, IPMatch == "DestinationIP", DestinationIP, IPMatch == "Message", MessageIP, "NoMatch")
  | extend AccountName = tostring(split(SourceUserID, "@")[0]), AccountUPNSuffix = tostring(split(SourceUserID, "@")[1])
  ),
  (DnsEvents
  | where IPAddresses in (IPList) or Name in~ (domains)
  | project TimeGenerated, Computer, IPAddresses, Name, ClientIP, Type
  | extend IPAddress = IPAddresses, DNSName = Name, Computer
  ),
  (VMConnection
  | where SourceIp in (IPList) or DestinationIp in (IPList) or RemoteDnsCanonicalNames has_any (domains)
  | parse RemoteDnsCanonicalNames with * '["' DNSName '"]' *
  | project TimeGenerated, Computer, Direction, ProcessName, SourceIp, DestinationIp, DestinationPort, RemoteDnsQuestions, DNSName,BytesSent, BytesReceived, RemoteCountry, Type
  | extend IPMatch = case( SourceIp in (IPList), "SourceIP", DestinationIp in (IPList), "DestinationIP", "None") 
  | extend IPAddress = case(IPMatch == "SourceIP", SourceIp, IPMatch == "DestinationIP", DestinationIp, "NoMatch"), File = ProcessName
  ),
  (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 = tostring(EventDetail.[4].["#text"])
  | where SourceIP in (IPList) or DestinationIP in (IPList)
  | project TimeGenerated, SourceIP, DestinationIP, Image, UserName, Computer, Type
  | extend IPMatch = case( SourceIP in (IPList), "SourceIP", DestinationIP in (IPList), "DestinationIP", "None")
  | extend AccountNT = UserName, File = tostring(split(Image, '\\', -1)[-1]), IPAddress = case(IPMatch == "SourceIP", SourceIP, IPMatch == "DestinationIP", DestinationIP, "None")
  ), 
  (OfficeActivity
  | where ClientIP in (IPList) 
  | project TimeGenerated, UserAgent, Operation, RecordType, UserId, ClientIP, Type
  | extend IPAddress = ClientIP, AccountUPN = UserId, AccountUPNName = tostring(split(UserId, "@")[0]), AccountUPNSuffix = tostring(split(UserId, "@")[1])
  ),
  (DeviceNetworkEvents
  | where RemoteUrl has_any (domains) or RemoteIP in (IPList) or InitiatingProcessSHA256 in (sha256Hashes)
  | project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessSHA256, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RemoteIP, RemoteUrl, RemotePort, LocalIP, Type
  | extend IPAddress = RemoteIP, FileHash = InitiatingProcessSHA256
  | extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, "@")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, "@")[1])
  ),
  (WindowsFirewall
  | where SourceIP in (IPList) or DestinationIP in (IPList) 
  | project TimeGenerated, Computer, CommunicationDirection, SourceIP, DestinationIP, SourcePort, DestinationPort, Type
  | extend IPMatch = case( SourceIP in (IPList), "SourceIP", DestinationIP in (IPList), "DestinationIP", "None")
  | extend IPAddress = case(IPMatch == "SourceIP", SourceIP, IPMatch == "DestinationIP", DestinationIP, "None")
  ),
  (AzureDiagnostics 
  | where ResourceType == "AZUREFIREWALLS"
  | where Category == "AzureFirewallApplicationRule"
  | parse msg_s with Protocol 'request from ' SourceHost ':' SourcePort 'to ' DestinationHost ':' DestinationPort '. Action:' Action
  | where isnotempty(DestinationHost)
  | where DestinationHost has_any (IPList) or DestinationHost has_any (domains) 
  | extend DNSName = DestinationHost, IPAddress = SourceHost
  ),
  (AzureDiagnostics
  | where ResourceType == "AZUREFIREWALLS"
  | where Category == "AzureFirewallNetworkRule"
  | where msg_s has_any (IPList)
  | parse msg_s with Protocol " request from " SourceIP ":" SourcePortInt:int " to " TargetIP ":" TargetPortInt:int *
  | parse kind=regex flags=U msg_s with * ". Action\\: " Action1a "\\."
  | parse msg_s with * ". Policy: " Policy ". Rule Collection Group: " RuleCollectionGroup "." *
  | parse msg_s with * " Rule Collection: "  RuleCollection ". Rule: " Rule 
  | extend IPAddress = SourceIP
  ),
  (AzureDiagnostics
  | where ResourceType == "AZUREFIREWALLS"
  | where Category == "AzureFirewallDnsProxy"
  | where msg_s has_any (domains)
  | parse msg_s with "DNS Request: " SourceIP ":" SourcePortInt:int " - " QueryID:int " " RequestType " " RequestClass " " hostname ". " protocol " " details
  | extend
      ResponseDuration = extract("[0-9]*.?[0-9]+s$", 0, msg_s),
      SourcePort = tostring(SourcePortInt),
      QueryID = tostring(QueryID)
  | project TimeGenerated,SourceIP,hostname,RequestType,ResponseDuration,details,msg_s
  | extend IPAddress = SourceIP
  ),
  (AZFWApplicationRule
  | where Fqdn has_any (domains) or Fqdn has_any (IPList)
  | extend IPAddress = SourceIp
  ),
  (AZFWDnsQuery
  | where isnotempty(QueryName)
  | where QueryName has_any (domains)
  | extend DNSName = QueryName, IPAddress = SourceIp
  ),
  (AZFWNetworkRule
  | where DestinationIp has_any (IPList)
  | extend IPAddress = SourceIp
  ),
  (CommonSecurityLog
  | where FileHash in (sha256Hashes)
  | project TimeGenerated, Message, SourceUserID, FileHash, Type
  | extend Algorithm = "SHA256", FileHash = tostring(FileHash), AccountUPN = SourceUserID, AccountUPNName = tostring(split(SourceUserID, "@")[0]), AccountUPNSuffix = tostring(split(SourceUserID, "@")[1])
  ),
  (imFileEvent
  | where TargetFileSHA256 has_any (sha256Hashes)
  | extend AccountNT = ActorUsername, Computer = DvcHostname, IPAddress = SrcIpAddr, CommandLine = ActingProcessCommandLine, FileHash = TargetFileSHA256
  | project Type, TimeGenerated, Computer, AccountNT, IPAddress, CommandLine, FileHash, Algorithm = "SHA256"
  ),
  (DeviceFileEvents
  | where SHA256 has_any (sha256Hashes)
  | project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, Type
  | extend Algorithm = "SHA256", FileHash = tostring(InitiatingProcessSHA256), CommandLine = InitiatingProcessCommandLine,Image = InitiatingProcessFolderPath
  | extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, "@")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, "@")[1])
  ),
  (DeviceImageLoadEvents
  | where SHA256 has_any (sha256Hashes)
  | project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, Type
  | extend Algorithm = "SHA256", FileHash = tostring(InitiatingProcessSHA256), CommandLine = InitiatingProcessCommandLine,Image = InitiatingProcessFolderPath
  | extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, "@")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, "@")[1])
  ),
  (Event
  | where Source =~ "Microsoft-Windows-Sysmon"
  | where EventID == 1
  | extend EvData = parse_xml(EventData)
  | extend EventDetail = EvData.DataItem.EventData.Data
  | extend Image = EventDetail.[4].["#text"], CommandLine = EventDetail.[10].["#text"], Hashes = tostring(EventDetail.[17].["#text"])
  | extend Hashes = extract_all(@"(?P<key>\w+)=(?P<value>[a-zA-Z0-9]+)", dynamic(["key","value"]), Hashes)
  | extend Hashes = column_ifexists("Hashes", dynamic(["", ""])), CommandLine = column_ifexists("CommandLine", "")
  | mv-expand Hashes
  | where Hashes[0] =~ "SHA256" and Hashes[1] has_any (sha256Hashes) 
  | project TimeGenerated, EventDetail, AccountNT = UserName, Computer, Type, Source, Hashes, CommandLine, Image
  | extend Type = strcat(Type, ": ", Source), FileHash = tostring(Hashes[1]), Algorithm = tostring(Hashes[0])
  )
  )
  | extend AccountNTName = tostring(split(AccountNT, "\\")[1]), AccountNTDomain = tostring(split(AccountNT, "\\")[0])
  | extend HostName = tostring(split(Computer, ".")[0]), DomainIndex = toint(indexof(Computer, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)
  | project-away DomainIndex  
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/ae10c588-7ff7-486c-9920-ab8b0bdb6ede')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ae10c588-7ff7-486c-9920-ab8b0bdb6ede')]",
      "properties": {
        "alertRuleTemplateName": "ae10c588-7ff7-486c-9920-ab8b0bdb6ede",
        "customDetails": null,
        "description": "'Identifies a match across various data feeds for domains, hashes and IP IOC related to Mercury\n Reference:  https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/'\n",
        "displayName": "Mercury - Domain, Hash and IP IOCs - August 2022",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountUPN",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountUPNName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountUPNSuffix",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountNT",
                "identifier": "FullName"
              },
              {
                "columnName": "AccountNTName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountNTDomain",
                "identifier": "UPNSuffix"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "Computer",
                "identifier": "FullName"
              },
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "HostNameDomain",
                "identifier": "DnsDomain"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPAddress",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "FileHash",
            "fieldMappings": [
              {
                "columnName": "Algorithm",
                "identifier": "Algorithm"
              },
              {
                "columnName": "FileHash",
                "identifier": "Value"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/MultipleDataSources/Mercury_Log4j_August2022.yaml",
        "query": "let iocs = externaldata(DateAdded:string,IoC:string,Type:string,TLP:string) [@\"https://raw.githubusercontent.com/Azure/Azure-Sentinel/master/Sample%20Data/Feeds/Mercury_August2022.csv\"] with (format=\"csv\", ignoreFirstRecord=True);\nlet sha256Hashes = (iocs | where Type =~ \"sha256\" | project IoC);\nlet IPList = (iocs | where Type =~ \"ip\"| project IoC);\nlet domains = (iocs | where Type =~ \"domainname\"| project IoC);\nlet IPRegex = '[0-9]{1,3}\\\\.[0-9]{1,3}\\\\.[0-9]{1,3}\\\\.[0-9]{1,3}';\n(union isfuzzy=true\n(CommonSecurityLog\n| where SourceIP in (IPList) or DestinationIP in (IPList) or DestinationHostName has_any (domains) or RequestURL has_any (domains) or Message has_any (IPList)\n| parse Message with * '(' DNSName ')' * \n| project TimeGenerated, SourceIP, DestinationIP, Message, SourceUserID, RequestURL, DNSName, Type\n| extend MessageIP = extract(IPRegex, 0, Message), RequestIP = extract(IPRegex, 0, RequestURL)\n| extend IPMatch = case(SourceIP in (IPList), \"SourceIP\", DestinationIP in (IPList), \"DestinationIP\", MessageIP in (IPList), \"Message\", RequestURL has_any (domains), \"RequestUrl\", \"NoMatch\")\n| extend IPAddress = case(IPMatch == \"SourceIP\", SourceIP, IPMatch == \"DestinationIP\", DestinationIP, IPMatch == \"Message\", MessageIP, \"NoMatch\")\n| extend AccountName = tostring(split(SourceUserID, \"@\")[0]), AccountUPNSuffix = tostring(split(SourceUserID, \"@\")[1])\n),\n(DnsEvents\n| where IPAddresses in (IPList) or Name in~ (domains)\n| project TimeGenerated, Computer, IPAddresses, Name, ClientIP, Type\n| extend IPAddress = IPAddresses, DNSName = Name, Computer\n),\n(VMConnection\n| where SourceIp in (IPList) or DestinationIp in (IPList) or RemoteDnsCanonicalNames has_any (domains)\n| parse RemoteDnsCanonicalNames with * '[\"' DNSName '\"]' *\n| project TimeGenerated, Computer, Direction, ProcessName, SourceIp, DestinationIp, DestinationPort, RemoteDnsQuestions, DNSName,BytesSent, BytesReceived, RemoteCountry, Type\n| extend IPMatch = case( SourceIp in (IPList), \"SourceIP\", DestinationIp in (IPList), \"DestinationIP\", \"None\") \n| extend IPAddress = case(IPMatch == \"SourceIP\", SourceIp, IPMatch == \"DestinationIP\", DestinationIp, \"NoMatch\"), File = ProcessName\n),\n(Event\n| where Source == \"Microsoft-Windows-Sysmon\"\n| where EventID == 3\n| extend EvData = parse_xml(EventData)\n| extend EventDetail = EvData.DataItem.EventData.Data\n| extend SourceIP = tostring(EventDetail.[9].[\"#text\"]), DestinationIP = tostring(EventDetail.[14].[\"#text\"]), Image = tostring(EventDetail.[4].[\"#text\"])\n| where SourceIP in (IPList) or DestinationIP in (IPList)\n| project TimeGenerated, SourceIP, DestinationIP, Image, UserName, Computer, Type\n| extend IPMatch = case( SourceIP in (IPList), \"SourceIP\", DestinationIP in (IPList), \"DestinationIP\", \"None\")\n| extend AccountNT = UserName, File = tostring(split(Image, '\\\\', -1)[-1]), IPAddress = case(IPMatch == \"SourceIP\", SourceIP, IPMatch == \"DestinationIP\", DestinationIP, \"None\")\n), \n(OfficeActivity\n| where ClientIP in (IPList) \n| project TimeGenerated, UserAgent, Operation, RecordType, UserId, ClientIP, Type\n| extend IPAddress = ClientIP, AccountUPN = UserId, AccountUPNName = tostring(split(UserId, \"@\")[0]), AccountUPNSuffix = tostring(split(UserId, \"@\")[1])\n),\n(DeviceNetworkEvents\n| where RemoteUrl has_any (domains) or RemoteIP in (IPList) or InitiatingProcessSHA256 in (sha256Hashes)\n| project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessSHA256, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, RemoteIP, RemoteUrl, RemotePort, LocalIP, Type\n| extend IPAddress = RemoteIP, FileHash = InitiatingProcessSHA256\n| extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, \"@\")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, \"@\")[1])\n),\n(WindowsFirewall\n| where SourceIP in (IPList) or DestinationIP in (IPList) \n| project TimeGenerated, Computer, CommunicationDirection, SourceIP, DestinationIP, SourcePort, DestinationPort, Type\n| extend IPMatch = case( SourceIP in (IPList), \"SourceIP\", DestinationIP in (IPList), \"DestinationIP\", \"None\")\n| extend IPAddress = case(IPMatch == \"SourceIP\", SourceIP, IPMatch == \"DestinationIP\", DestinationIP, \"None\")\n),\n(AzureDiagnostics \n| where ResourceType == \"AZUREFIREWALLS\"\n| where Category == \"AzureFirewallApplicationRule\"\n| parse msg_s with Protocol 'request from ' SourceHost ':' SourcePort 'to ' DestinationHost ':' DestinationPort '. Action:' Action\n| where isnotempty(DestinationHost)\n| where DestinationHost has_any (IPList) or DestinationHost has_any (domains) \n| extend DNSName = DestinationHost, IPAddress = SourceHost\n),\n(AzureDiagnostics\n| where ResourceType == \"AZUREFIREWALLS\"\n| where Category == \"AzureFirewallNetworkRule\"\n| where msg_s has_any (IPList)\n| parse msg_s with Protocol \" request from \" SourceIP \":\" SourcePortInt:int \" to \" TargetIP \":\" TargetPortInt:int *\n| parse kind=regex flags=U msg_s with * \". Action\\\\: \" Action1a \"\\\\.\"\n| parse msg_s with * \". Policy: \" Policy \". Rule Collection Group: \" RuleCollectionGroup \".\" *\n| parse msg_s with * \" Rule Collection: \"  RuleCollection \". Rule: \" Rule \n| extend IPAddress = SourceIP\n),\n(AzureDiagnostics\n| where ResourceType == \"AZUREFIREWALLS\"\n| where Category == \"AzureFirewallDnsProxy\"\n| where msg_s has_any (domains)\n| parse msg_s with \"DNS Request: \" SourceIP \":\" SourcePortInt:int \" - \" QueryID:int \" \" RequestType \" \" RequestClass \" \" hostname \". \" protocol \" \" details\n| extend\n    ResponseDuration = extract(\"[0-9]*.?[0-9]+s$\", 0, msg_s),\n    SourcePort = tostring(SourcePortInt),\n    QueryID = tostring(QueryID)\n| project TimeGenerated,SourceIP,hostname,RequestType,ResponseDuration,details,msg_s\n| extend IPAddress = SourceIP\n),\n(AZFWApplicationRule\n| where Fqdn has_any (domains) or Fqdn has_any (IPList)\n| extend IPAddress = SourceIp\n),\n(AZFWDnsQuery\n| where isnotempty(QueryName)\n| where QueryName has_any (domains)\n| extend DNSName = QueryName, IPAddress = SourceIp\n),\n(AZFWNetworkRule\n| where DestinationIp has_any (IPList)\n| extend IPAddress = SourceIp\n),\n(CommonSecurityLog\n| where FileHash in (sha256Hashes)\n| project TimeGenerated, Message, SourceUserID, FileHash, Type\n| extend Algorithm = \"SHA256\", FileHash = tostring(FileHash), AccountUPN = SourceUserID, AccountUPNName = tostring(split(SourceUserID, \"@\")[0]), AccountUPNSuffix = tostring(split(SourceUserID, \"@\")[1])\n),\n(imFileEvent\n| where TargetFileSHA256 has_any (sha256Hashes)\n| extend AccountNT = ActorUsername, Computer = DvcHostname, IPAddress = SrcIpAddr, CommandLine = ActingProcessCommandLine, FileHash = TargetFileSHA256\n| project Type, TimeGenerated, Computer, AccountNT, IPAddress, CommandLine, FileHash, Algorithm = \"SHA256\"\n),\n(DeviceFileEvents\n| where SHA256 has_any (sha256Hashes)\n| project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, Type\n| extend Algorithm = \"SHA256\", FileHash = tostring(InitiatingProcessSHA256), CommandLine = InitiatingProcessCommandLine,Image = InitiatingProcessFolderPath\n| extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, \"@\")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, \"@\")[1])\n),\n(DeviceImageLoadEvents\n| where SHA256 has_any (sha256Hashes)\n| project TimeGenerated, ActionType, DeviceId, Computer = DeviceName, InitiatingProcessAccountDomain, InitiatingProcessAccountName, InitiatingProcessCommandLine, InitiatingProcessFolderPath, InitiatingProcessId, InitiatingProcessParentFileName, InitiatingProcessFileName, InitiatingProcessSHA256, Type\n| extend Algorithm = \"SHA256\", FileHash = tostring(InitiatingProcessSHA256), CommandLine = InitiatingProcessCommandLine,Image = InitiatingProcessFolderPath\n| extend AccountUPN = InitiatingProcessAccountName, AccountUPNName = tostring(split(InitiatingProcessAccountName, \"@\")[0]), AccountUPNSuffix = tostring(split(InitiatingProcessAccountName, \"@\")[1])\n),\n(Event\n| where Source =~ \"Microsoft-Windows-Sysmon\"\n| where EventID == 1\n| extend EvData = parse_xml(EventData)\n| extend EventDetail = EvData.DataItem.EventData.Data\n| extend Image = EventDetail.[4].[\"#text\"], CommandLine = EventDetail.[10].[\"#text\"], Hashes = tostring(EventDetail.[17].[\"#text\"])\n| extend Hashes = extract_all(@\"(?P<key>\\w+)=(?P<value>[a-zA-Z0-9]+)\", dynamic([\"key\",\"value\"]), Hashes)\n| extend Hashes = column_ifexists(\"Hashes\", dynamic([\"\", \"\"])), CommandLine = column_ifexists(\"CommandLine\", \"\")\n| mv-expand Hashes\n| where Hashes[0] =~ \"SHA256\" and Hashes[1] has_any (sha256Hashes) \n| project TimeGenerated, EventDetail, AccountNT = UserName, Computer, Type, Source, Hashes, CommandLine, Image\n| extend Type = strcat(Type, \": \", Source), FileHash = tostring(Hashes[1]), Algorithm = tostring(Hashes[0])\n)\n)\n| extend AccountNTName = tostring(split(AccountNT, \"\\\\\")[1]), AccountNTDomain = tostring(split(AccountNT, \"\\\\\")[0])\n| extend HostName = tostring(split(Computer, \".\")[0]), DomainIndex = toint(indexof(Computer, '.'))\n| extend HostNameDomain = iff(DomainIndex != -1, substring(Computer, DomainIndex + 1), Computer)\n| project-away DomainIndex\n",
        "queryFrequency": "PT12H",
        "queryPeriod": "PT12H",
        "severity": "High",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "tags": [
          "Mercury",
          {
            "Schema": "ASIMFileEvent",
            "SchemaVersion": "0.1.0"
          }
        ],
        "techniques": [
          "T1071"
        ],
        "templateVersion": "1.1.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}