Probable AdFind Recon Tool Usage Normalized Process Events

let args = dynamic(["objectcategory","domainlist","dcmodes","adinfo","trustdmp","computers_pwdnotreqd","Domain Admins", "objectcategory=person", "objectcategory=computer", "objectcategory=*","dclist"]);
let parentProcesses = dynamic(["pwsh.exe","powershell.exe","cmd.exe"]);
imProcessCreate
//looks for execution from a shell
| where ActingProcessName has_any (parentProcesses)
| extend ActingProcessFileName = tostring(split(ActingProcessName, '\\')[-1])
| where ActingProcessFileName in~ (parentProcesses)
// main filter
| where Process hassuffix "AdFind.exe" or TargetProcessSHA256 == "c92c158d7c37fea795114fa6491fe5f145ad2f8c08776b18ae79db811e8e36a3"
// AdFind common Flags to check for from various threat actor TTPs
or CommandLine has_any (args)
| extend AlgorithmType = "SHA256"
| extend AccountName = tostring(split(User, @'\')[1]), AccountNTDomain = tostring(split(User, @'\')[0])
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
| project-away DomainIndex

name: Probable AdFind Recon Tool Usage (Normalized Process Events)
severity: High
description: |
  'Identifies the host and account that executed AdFind by hash and filename in addition to common and unique flags that are used by many threat actors in discovery.
  To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'  
version: 1.1.6
requiredDataConnectors: []
relevantTechniques:
- T1018
triggerThreshold: 0
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: FullName
    columnName: User
  - identifier: Name
    columnName: AccountName
  - identifier: NTDomain
    columnName: AccountNTDomain
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: Dvc
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: HostNameDomain
- entityType: Process
  fieldMappings:
  - identifier: ProcessId
    columnName: ActingProcessName
  - identifier: CommandLine
    columnName: CommandLine
- entityType: FileHash
  fieldMappings:
  - identifier: Algorithm
    columnName: AlgorithmType
  - identifier: Value
    columnName: TargetProcessSHA256
tags:
- version: 1.0.0
  Id: c63ae777-d5e0-4113-8c9a-c2c9d3d09fcd
- Schema: ASIMProcessEvent
  SchemaVersion: 0.1.0
tactics:
- Discovery
queryPeriod: 1h
metadata:
  categories:
    domains:
    - Security - Threat Intelligence
  support:
    tier: Community
  author:
    name: Yuval Naor
  source:
    kind: Community
kind: Scheduled
triggerOperator: gt
query: |
  let args = dynamic(["objectcategory","domainlist","dcmodes","adinfo","trustdmp","computers_pwdnotreqd","Domain Admins", "objectcategory=person", "objectcategory=computer", "objectcategory=*","dclist"]);
  let parentProcesses = dynamic(["pwsh.exe","powershell.exe","cmd.exe"]);
  imProcessCreate
  //looks for execution from a shell
  | where ActingProcessName has_any (parentProcesses)
  | extend ActingProcessFileName = tostring(split(ActingProcessName, '\\')[-1])
  | where ActingProcessFileName in~ (parentProcesses)
  // main filter
  | where Process hassuffix "AdFind.exe" or TargetProcessSHA256 == "c92c158d7c37fea795114fa6491fe5f145ad2f8c08776b18ae79db811e8e36a3"
  // AdFind common Flags to check for from various threat actor TTPs
  or CommandLine has_any (args)
  | extend AlgorithmType = "SHA256"
  | extend AccountName = tostring(split(User, @'\')[1]), AccountNTDomain = tostring(split(User, @'\')[0])
  | extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
  | project-away DomainIndex  
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_AdFind_Usage.yaml
id: 45076281-35ae-45e0-b443-c32aa0baf965