RDP Nesting
| Id | 69a45b05-71f5-45ca-8944-2e038747fb39 |
| Rulename | RDP Nesting |
| Description | Query detects potential lateral movement within a network by identifying when an RDP connection (EventID 4624, LogonType 10) is made to an initial system, followed by a subsequent RDP connection from that system to another, using the same account within a 60-minute window. To reduce false positives, it excludes scenarios where the same account has made 5 or more connections to the same set of computers in the previous 7 days. This approach focuses on highlighting unusual RDP behaviour that suggests lateral movement, which is often associated with attacker tactics during a network breach. |
| Severity | Medium |
| Tactics | LateralMovement |
| Techniques | T1021 |
| Required data connectors | SecurityEvents WindowsForwardedEvents WindowsSecurityEvents |
| Kind | Scheduled |
| Query frequency | 1d |
| Query period | 8d |
| Trigger threshold | 0 |
| Trigger operator | gt |
| Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/RDP_Nesting.yaml |
| Version | 1.2.7 |
| Arm template | 69a45b05-71f5-45ca-8944-2e038747fb39.json |
let endtime = 1d;
let starttime = 8d;
// The threshold below excludes matching on RDP connection computer counts of 5 or more by a given account and IP in a given day. Change the threshold as needed.
let threshold = 5;
// Function to resolve hostname to IP address using DNS logs or a lookup table (example syntax)
let rdpConnections =
(union isfuzzy=true
(
SecurityEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and LogonType == 10
// Labeling the first RDP connection time, computer and ip
| extend
FirstHop = bin(TimeGenerated, 1m),
FirstComputer = toupper(Computer),
FirstIPAddress = IpAddress,
Account = tolower(Account)
),
(
WindowsEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and EventData has ("10")
| extend LogonType = tostring(EventData.LogonType)
| where LogonType == 10 // Labeling the first RDP connection time, computer and ip
| extend Account = strcat(tostring(EventData.TargetDomainName), "\\", tostring(EventData.TargetUserName))
| extend IpAddress = tostring(EventData.IpAddress)
| extend
FirstHop = bin(TimeGenerated, 1m),
FirstComputer = toupper(Computer),
FirstIPAddress = IpAddress,
Account = tolower(Account)
))
| join kind=inner (
(union isfuzzy=true
(
SecurityEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and LogonType == 10
// Labeling the second RDP connection time, computer and ip
| extend
SecondHop = bin(TimeGenerated, 1m),
SecondComputer = toupper(Computer),
SecondIPAddress = IpAddress,
Account = tolower(Account)
),
(
WindowsEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and EventData has ("10")
| extend LogonType = toint(EventData.LogonType)
| where LogonType == 10 // Labeling the second RDP connection time, computer and ip
| extend Account = strcat(tostring(EventData.TargetDomainName), "\\", tostring(EventData.TargetUserName))
| extend IpAddress = tostring(EventData.IpAddress)
| extend
SecondHop = bin(TimeGenerated, 1m),
SecondComputer = toupper(Computer),
SecondIPAddress = IpAddress,
Account = tolower(Account)
))
)
on Account
// Ensure the first connection is before the second connection
// Identify only RDP to another computer from within the first RDP connection by only choosing matches where the Computer names do not match
// Ensure the IPAddresses do not match by excluding connections from the same computers with first hop RDP connections to multiple computers
| where FirstComputer != SecondComputer
and FirstIPAddress != SecondIPAddress
and SecondHop > FirstHop
// Ensure the second hop occurs within 30 minutes of the first hop
| where SecondHop <= FirstHop + 30m
| distinct
Account,
FirstHop,
FirstComputer,
FirstIPAddress,
SecondHop,
SecondComputer,
SecondIPAddress,
AccountType,
Activity,
LogonTypeName,
ProcessName;
// Resolve hostnames to IP addresses device network Ip's
let listOfFirstComputer = rdpConnections | distinct FirstComputer;
let listOfSecondComputer = rdpConnections | distinct SecondComputer;
let resolvedIPs =
DeviceNetworkInfo
| where TimeGenerated >= ago(endtime)
| where isnotempty(ConnectedNetworks) and NetworkAdapterStatus == "Up"
| extend ClientIP = tostring(parse_json(IPAddresses[0]).IPAddress)
| where isnotempty(ClientIP)
| where DeviceName in~ (listOfFirstComputer) or DeviceName in~ (listOfSecondComputer)
| summarize arg_max(TimeGenerated, ClientIP) by Computer= DeviceName
| project Computer=toupper(Computer), ResolvedIP = ClientIP;
// Join resolved IPs with the RDP connections
rdpConnections
| join kind=inner (resolvedIPs) on $left.FirstComputer == $right.Computer
| join kind=inner (resolvedIPs) on $left.SecondComputer == $right.Computer
| where ResolvedIP != ResolvedIP1
| distinct
Account,
FirstHop,
FirstComputer,
FirstIPAddress,
SecondHop,
SecondComputer,
SecondIPAddress,
AccountType,
Activity,
LogonTypeName,
ProcessName
// Use left anti to exclude anything from the previous 7 days where the Account and IP has connected to 5 or more computers.
| join kind=leftanti (
(union isfuzzy=true
(
SecurityEvent
| where TimeGenerated >= ago(starttime) and TimeGenerated < ago(endtime)
| where EventID == 4624 and LogonType == 10
| summarize make_set(Computer), ComputerCount = dcount(Computer) by bin(TimeGenerated, 1d), Account = tolower(Account), IpAddress
// Connection count to computer by same account and IP to exclude counts of 5 or more on a given day
| where ComputerCount >= threshold
| mvexpand set_Computer
| extend Computer = toupper(set_Computer)
),
(
WindowsEvent
| where TimeGenerated >= ago(starttime) and TimeGenerated < ago(endtime)
| where EventID == 4624 and EventData has ("10")
| extend LogonType = tostring(EventData.LogonType)
| where LogonType == 10
| extend Account = strcat(tostring(EventData.TargetDomainName), "\\", tostring(EventData.TargetUserName))
| extend IpAddress = tostring(EventData.IpAddress)
| summarize make_set(Computer), ComputerCount = dcount(Computer) by bin(TimeGenerated, 1d), Account = tolower(Account), IpAddress
// Connection count to computer by same account and IP to exclude counts of 5 or more on a given day
| where ComputerCount >= threshold
| mvexpand set_Computer
| extend Computer = toupper(set_Computer)
))
)
on
Account,
$left.SecondComputer == $right.Computer,
$left.SecondIPAddress == $right.IpAddress
| summarize FirstHopFirstSeen = min(FirstHop), FirstHopLastSeen = max(FirstHop)
by
Account,
FirstComputer,
FirstIPAddress,
SecondHop,
SecondComputer,
SecondIPAddress,
AccountType,
Activity,
LogonTypeName,
ProcessName
| extend
AccountName = tostring(split(Account, @"\")[1]),
AccountNTDomain = tostring(split(Account, @"\")[0])
| extend
HostName1 = tostring(split(FirstComputer, ".")[0]),
DomainIndex = toint(indexof(FirstComputer, '.'))
| extend HostNameDomain1 = iff(DomainIndex != -1, substring(FirstComputer, DomainIndex + 1), FirstComputer)
| extend
HostName2 = tostring(split(SecondComputer, ".")[0]),
DomainIndex = toint(indexof(SecondComputer, '.'))
| extend HostNameDomain2 = iff(DomainIndex != -1, substring(SecondComputer, DomainIndex + 1), SecondComputer)
| project-away DomainIndex
version: 1.2.7
severity: Medium
queryFrequency: 1d
metadata:
categories:
domains:
- Security - Threat Protection
author:
name: Microsoft Security Research
support:
tier: Community
source:
kind: Community
triggerOperator: gt
relevantTechniques:
- T1021
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/RDP_Nesting.yaml
kind: Scheduled
triggerThreshold: 0
query: |
let endtime = 1d;
let starttime = 8d;
// The threshold below excludes matching on RDP connection computer counts of 5 or more by a given account and IP in a given day. Change the threshold as needed.
let threshold = 5;
// Function to resolve hostname to IP address using DNS logs or a lookup table (example syntax)
let rdpConnections =
(union isfuzzy=true
(
SecurityEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and LogonType == 10
// Labeling the first RDP connection time, computer and ip
| extend
FirstHop = bin(TimeGenerated, 1m),
FirstComputer = toupper(Computer),
FirstIPAddress = IpAddress,
Account = tolower(Account)
),
(
WindowsEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and EventData has ("10")
| extend LogonType = tostring(EventData.LogonType)
| where LogonType == 10 // Labeling the first RDP connection time, computer and ip
| extend Account = strcat(tostring(EventData.TargetDomainName), "\\", tostring(EventData.TargetUserName))
| extend IpAddress = tostring(EventData.IpAddress)
| extend
FirstHop = bin(TimeGenerated, 1m),
FirstComputer = toupper(Computer),
FirstIPAddress = IpAddress,
Account = tolower(Account)
))
| join kind=inner (
(union isfuzzy=true
(
SecurityEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and LogonType == 10
// Labeling the second RDP connection time, computer and ip
| extend
SecondHop = bin(TimeGenerated, 1m),
SecondComputer = toupper(Computer),
SecondIPAddress = IpAddress,
Account = tolower(Account)
),
(
WindowsEvent
| where TimeGenerated >= ago(endtime)
| where EventID == 4624 and EventData has ("10")
| extend LogonType = toint(EventData.LogonType)
| where LogonType == 10 // Labeling the second RDP connection time, computer and ip
| extend Account = strcat(tostring(EventData.TargetDomainName), "\\", tostring(EventData.TargetUserName))
| extend IpAddress = tostring(EventData.IpAddress)
| extend
SecondHop = bin(TimeGenerated, 1m),
SecondComputer = toupper(Computer),
SecondIPAddress = IpAddress,
Account = tolower(Account)
))
)
on Account
// Ensure the first connection is before the second connection
// Identify only RDP to another computer from within the first RDP connection by only choosing matches where the Computer names do not match
// Ensure the IPAddresses do not match by excluding connections from the same computers with first hop RDP connections to multiple computers
| where FirstComputer != SecondComputer
and FirstIPAddress != SecondIPAddress
and SecondHop > FirstHop
// Ensure the second hop occurs within 30 minutes of the first hop
| where SecondHop <= FirstHop + 30m
| distinct
Account,
FirstHop,
FirstComputer,
FirstIPAddress,
SecondHop,
SecondComputer,
SecondIPAddress,
AccountType,
Activity,
LogonTypeName,
ProcessName;
// Resolve hostnames to IP addresses device network Ip's
let listOfFirstComputer = rdpConnections | distinct FirstComputer;
let listOfSecondComputer = rdpConnections | distinct SecondComputer;
let resolvedIPs =
DeviceNetworkInfo
| where TimeGenerated >= ago(endtime)
| where isnotempty(ConnectedNetworks) and NetworkAdapterStatus == "Up"
| extend ClientIP = tostring(parse_json(IPAddresses[0]).IPAddress)
| where isnotempty(ClientIP)
| where DeviceName in~ (listOfFirstComputer) or DeviceName in~ (listOfSecondComputer)
| summarize arg_max(TimeGenerated, ClientIP) by Computer= DeviceName
| project Computer=toupper(Computer), ResolvedIP = ClientIP;
// Join resolved IPs with the RDP connections
rdpConnections
| join kind=inner (resolvedIPs) on $left.FirstComputer == $right.Computer
| join kind=inner (resolvedIPs) on $left.SecondComputer == $right.Computer
| where ResolvedIP != ResolvedIP1
| distinct
Account,
FirstHop,
FirstComputer,
FirstIPAddress,
SecondHop,
SecondComputer,
SecondIPAddress,
AccountType,
Activity,
LogonTypeName,
ProcessName
// Use left anti to exclude anything from the previous 7 days where the Account and IP has connected to 5 or more computers.
| join kind=leftanti (
(union isfuzzy=true
(
SecurityEvent
| where TimeGenerated >= ago(starttime) and TimeGenerated < ago(endtime)
| where EventID == 4624 and LogonType == 10
| summarize make_set(Computer), ComputerCount = dcount(Computer) by bin(TimeGenerated, 1d), Account = tolower(Account), IpAddress
// Connection count to computer by same account and IP to exclude counts of 5 or more on a given day
| where ComputerCount >= threshold
| mvexpand set_Computer
| extend Computer = toupper(set_Computer)
),
(
WindowsEvent
| where TimeGenerated >= ago(starttime) and TimeGenerated < ago(endtime)
| where EventID == 4624 and EventData has ("10")
| extend LogonType = tostring(EventData.LogonType)
| where LogonType == 10
| extend Account = strcat(tostring(EventData.TargetDomainName), "\\", tostring(EventData.TargetUserName))
| extend IpAddress = tostring(EventData.IpAddress)
| summarize make_set(Computer), ComputerCount = dcount(Computer) by bin(TimeGenerated, 1d), Account = tolower(Account), IpAddress
// Connection count to computer by same account and IP to exclude counts of 5 or more on a given day
| where ComputerCount >= threshold
| mvexpand set_Computer
| extend Computer = toupper(set_Computer)
))
)
on
Account,
$left.SecondComputer == $right.Computer,
$left.SecondIPAddress == $right.IpAddress
| summarize FirstHopFirstSeen = min(FirstHop), FirstHopLastSeen = max(FirstHop)
by
Account,
FirstComputer,
FirstIPAddress,
SecondHop,
SecondComputer,
SecondIPAddress,
AccountType,
Activity,
LogonTypeName,
ProcessName
| extend
AccountName = tostring(split(Account, @"\")[1]),
AccountNTDomain = tostring(split(Account, @"\")[0])
| extend
HostName1 = tostring(split(FirstComputer, ".")[0]),
DomainIndex = toint(indexof(FirstComputer, '.'))
| extend HostNameDomain1 = iff(DomainIndex != -1, substring(FirstComputer, DomainIndex + 1), FirstComputer)
| extend
HostName2 = tostring(split(SecondComputer, ".")[0]),
DomainIndex = toint(indexof(SecondComputer, '.'))
| extend HostNameDomain2 = iff(DomainIndex != -1, substring(SecondComputer, DomainIndex + 1), SecondComputer)
| project-away DomainIndex
entityMappings:
- fieldMappings:
- columnName: Account
identifier: FullName
- columnName: AccountName
identifier: Name
- columnName: AccountNTDomain
identifier: NTDomain
entityType: Account
- fieldMappings:
- columnName: FirstComputer
identifier: FullName
- columnName: HostName1
identifier: HostName
- columnName: HostNameDomain1
identifier: NTDomain
entityType: Host
- fieldMappings:
- columnName: SecondComputer
identifier: FullName
- columnName: HostName2
identifier: HostName
- columnName: HostNameDomain2
identifier: NTDomain
entityType: Host
- fieldMappings:
- columnName: FirstIPAddress
identifier: Address
entityType: IP
name: RDP Nesting
queryPeriod: 8d
description: |
'Query detects potential lateral movement within a network by identifying when an RDP connection (EventID 4624, LogonType 10) is made to an initial system, followed by a subsequent RDP connection from that system to another, using the same account within a 60-minute window.
To reduce false positives, it excludes scenarios where the same account has made 5 or more connections to the same set of computers in the previous 7 days. This approach focuses on highlighting unusual RDP behaviour that suggests lateral movement, which is often associated with attacker tactics during a network breach.'
requiredDataConnectors:
- dataTypes:
- SecurityEvent
connectorId: SecurityEvents
- dataTypes:
- SecurityEvent
connectorId: WindowsSecurityEvents
- dataTypes:
- WindowsEvent
connectorId: WindowsForwardedEvents
id: 69a45b05-71f5-45ca-8944-2e038747fb39
tactics:
- LateralMovement
{
"$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/69a45b05-71f5-45ca-8944-2e038747fb39')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/69a45b05-71f5-45ca-8944-2e038747fb39')]",
"properties": {
"alertRuleTemplateName": "69a45b05-71f5-45ca-8944-2e038747fb39",
"customDetails": null,
"description": "'Query detects potential lateral movement within a network by identifying when an RDP connection (EventID 4624, LogonType 10) is made to an initial system, followed by a subsequent RDP connection from that system to another, using the same account within a 60-minute window.\n To reduce false positives, it excludes scenarios where the same account has made 5 or more connections to the same set of computers in the previous 7 days. This approach focuses on highlighting unusual RDP behaviour that suggests lateral movement, which is often associated with attacker tactics during a network breach.'\n",
"displayName": "RDP Nesting",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "Account",
"identifier": "FullName"
},
{
"columnName": "AccountName",
"identifier": "Name"
},
{
"columnName": "AccountNTDomain",
"identifier": "NTDomain"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "FirstComputer",
"identifier": "FullName"
},
{
"columnName": "HostName1",
"identifier": "HostName"
},
{
"columnName": "HostNameDomain1",
"identifier": "NTDomain"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "SecondComputer",
"identifier": "FullName"
},
{
"columnName": "HostName2",
"identifier": "HostName"
},
{
"columnName": "HostNameDomain2",
"identifier": "NTDomain"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "FirstIPAddress",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/SecurityEvent/RDP_Nesting.yaml",
"query": "let endtime = 1d;\nlet starttime = 8d;\n// The threshold below excludes matching on RDP connection computer counts of 5 or more by a given account and IP in a given day. Change the threshold as needed.\nlet threshold = 5;\n// Function to resolve hostname to IP address using DNS logs or a lookup table (example syntax)\nlet rdpConnections = \n (union isfuzzy=true\n (\n SecurityEvent\n | where TimeGenerated >= ago(endtime)\n | where EventID == 4624 and LogonType == 10\n // Labeling the first RDP connection time, computer and ip\n | extend\n FirstHop = bin(TimeGenerated, 1m),\n FirstComputer = toupper(Computer),\n FirstIPAddress = IpAddress,\n Account = tolower(Account)\n ),\n (\n WindowsEvent\n | where TimeGenerated >= ago(endtime)\n | where EventID == 4624 and EventData has (\"10\")\n | extend LogonType = tostring(EventData.LogonType)\n | where LogonType == 10 // Labeling the first RDP connection time, computer and ip\n | extend Account = strcat(tostring(EventData.TargetDomainName), \"\\\\\", tostring(EventData.TargetUserName))\n | extend IpAddress = tostring(EventData.IpAddress)\n | extend\n FirstHop = bin(TimeGenerated, 1m),\n FirstComputer = toupper(Computer),\n FirstIPAddress = IpAddress,\n Account = tolower(Account)\n ))\n | join kind=inner (\n (union isfuzzy=true\n (\n SecurityEvent\n | where TimeGenerated >= ago(endtime)\n | where EventID == 4624 and LogonType == 10\n // Labeling the second RDP connection time, computer and ip\n | extend\n SecondHop = bin(TimeGenerated, 1m),\n SecondComputer = toupper(Computer),\n SecondIPAddress = IpAddress,\n Account = tolower(Account)\n ),\n (\n WindowsEvent\n | where TimeGenerated >= ago(endtime)\n | where EventID == 4624 and EventData has (\"10\")\n | extend LogonType = toint(EventData.LogonType)\n | where LogonType == 10 // Labeling the second RDP connection time, computer and ip\n | extend Account = strcat(tostring(EventData.TargetDomainName), \"\\\\\", tostring(EventData.TargetUserName))\n | extend IpAddress = tostring(EventData.IpAddress)\n | extend\n SecondHop = bin(TimeGenerated, 1m),\n SecondComputer = toupper(Computer),\n SecondIPAddress = IpAddress,\n Account = tolower(Account)\n ))\n )\n on Account\n // Ensure the first connection is before the second connection\n // Identify only RDP to another computer from within the first RDP connection by only choosing matches where the Computer names do not match\n // Ensure the IPAddresses do not match by excluding connections from the same computers with first hop RDP connections to multiple computers\n | where FirstComputer != SecondComputer\n and FirstIPAddress != SecondIPAddress\n and SecondHop > FirstHop\n // Ensure the second hop occurs within 30 minutes of the first hop\n | where SecondHop <= FirstHop + 30m\n | distinct\n Account,\n FirstHop,\n FirstComputer,\n FirstIPAddress,\n SecondHop,\n SecondComputer,\n SecondIPAddress,\n AccountType,\n Activity,\n LogonTypeName,\n ProcessName; \n// Resolve hostnames to IP addresses device network Ip's\nlet listOfFirstComputer = rdpConnections | distinct FirstComputer;\nlet listOfSecondComputer = rdpConnections | distinct SecondComputer;\nlet resolvedIPs = \n DeviceNetworkInfo\n | where TimeGenerated >= ago(endtime)\n | where isnotempty(ConnectedNetworks) and NetworkAdapterStatus == \"Up\"\n | extend ClientIP = tostring(parse_json(IPAddresses[0]).IPAddress)\n | where isnotempty(ClientIP)\n | where DeviceName in~ (listOfFirstComputer) or DeviceName in~ (listOfSecondComputer)\n | summarize arg_max(TimeGenerated, ClientIP) by Computer= DeviceName\n | project Computer=toupper(Computer), ResolvedIP = ClientIP;\n// Join resolved IPs with the RDP connections\nrdpConnections\n| join kind=inner (resolvedIPs) on $left.FirstComputer == $right.Computer\n| join kind=inner (resolvedIPs) on $left.SecondComputer == $right.Computer\n| where ResolvedIP != ResolvedIP1\n| distinct\n Account,\n FirstHop,\n FirstComputer,\n FirstIPAddress,\n SecondHop,\n SecondComputer,\n SecondIPAddress,\n AccountType,\n Activity,\n LogonTypeName,\n ProcessName\n// Use left anti to exclude anything from the previous 7 days where the Account and IP has connected to 5 or more computers.\n| join kind=leftanti (\n (union isfuzzy=true\n (\n SecurityEvent\n | where TimeGenerated >= ago(starttime) and TimeGenerated < ago(endtime)\n | where EventID == 4624 and LogonType == 10\n | summarize make_set(Computer), ComputerCount = dcount(Computer) by bin(TimeGenerated, 1d), Account = tolower(Account), IpAddress\n // Connection count to computer by same account and IP to exclude counts of 5 or more on a given day\n | where ComputerCount >= threshold\n | mvexpand set_Computer\n | extend Computer = toupper(set_Computer)\n ),\n (\n WindowsEvent\n | where TimeGenerated >= ago(starttime) and TimeGenerated < ago(endtime)\n | where EventID == 4624 and EventData has (\"10\")\n | extend LogonType = tostring(EventData.LogonType)\n | where LogonType == 10\n | extend Account = strcat(tostring(EventData.TargetDomainName), \"\\\\\", tostring(EventData.TargetUserName))\n | extend IpAddress = tostring(EventData.IpAddress)\n | summarize make_set(Computer), ComputerCount = dcount(Computer) by bin(TimeGenerated, 1d), Account = tolower(Account), IpAddress\n // Connection count to computer by same account and IP to exclude counts of 5 or more on a given day\n | where ComputerCount >= threshold\n | mvexpand set_Computer\n | extend Computer = toupper(set_Computer)\n ))\n )\n on\n Account,\n $left.SecondComputer == $right.Computer,\n $left.SecondIPAddress == $right.IpAddress\n| summarize FirstHopFirstSeen = min(FirstHop), FirstHopLastSeen = max(FirstHop)\n by\n Account,\n FirstComputer,\n FirstIPAddress,\n SecondHop,\n SecondComputer,\n SecondIPAddress,\n AccountType,\n Activity,\n LogonTypeName,\n ProcessName\n| extend\n AccountName = tostring(split(Account, @\"\\\")[1]),\n AccountNTDomain = tostring(split(Account, @\"\\\")[0])\n| extend\n HostName1 = tostring(split(FirstComputer, \".\")[0]),\n DomainIndex = toint(indexof(FirstComputer, '.'))\n| extend HostNameDomain1 = iff(DomainIndex != -1, substring(FirstComputer, DomainIndex + 1), FirstComputer)\n| extend\n HostName2 = tostring(split(SecondComputer, \".\")[0]),\n DomainIndex = toint(indexof(SecondComputer, '.'))\n| extend HostNameDomain2 = iff(DomainIndex != -1, substring(SecondComputer, DomainIndex + 1), SecondComputer)\n| project-away DomainIndex\n",
"queryFrequency": "P1D",
"queryPeriod": "P8D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"LateralMovement"
],
"techniques": [
"T1021"
],
"templateVersion": "1.2.7",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}