Malicious PowerShell Commandlets

Detects Commandlet names from well-known PowerShell exploitation frameworks

Rule Content

- title: Malicious PowerShell Commandlets
  id: 89819aa4-bbd6-46bc-88ec-c7f7fe30efa6
  status: experimental
  description: Detects Commandlet names from well-known PowerShell exploitation frameworks
  modified: 2019/01/22
  references:
  - https://adsecurity.org/?p=2921
  tags:
  - attack.execution
  - attack.t1086
  author: Sean Metcalf (source), Florian Roth (rule)
  logsource:
    product: windows
    service: powershell
    definition: It is recommended to use the new "Script Block Logging" of PowerShell
      v5 https://adsecurity.org/?p=2277
    category: null
  detection:
    keywords:
      Message:
      - '*Invoke-DllInjection*'
      - '*Invoke-Shellcode*'
      - '*Invoke-WmiCommand*'
      - '*Get-GPPPassword*'
      - '*Get-Keystrokes*'
      - '*Get-TimedScreenshot*'
      - '*Get-VaultCredential*'
      - '*Invoke-CredentialInjection*'
      - '*Invoke-Mimikatz*'
      - '*Invoke-NinjaCopy*'
      - '*Invoke-TokenManipulation*'
      - '*Out-Minidump*'
      - '*VolumeShadowCopyTools*'
      - '*Invoke-ReflectivePEInjection*'
      - '*Invoke-UserHunter*'
      - '*Find-GPOLocation*'
      - '*Invoke-ACLScanner*'
      - '*Invoke-DowngradeAccount*'
      - '*Get-ServiceUnquoted*'
      - '*Get-ServiceFilePermission*'
      - '*Get-ServicePermission*'
      - '*Invoke-ServiceAbuse*'
      - '*Install-ServiceBinary*'
      - '*Get-RegAutoLogon*'
      - '*Get-VulnAutoRun*'
      - '*Get-VulnSchTask*'
      - '*Get-UnattendedInstallFile*'
      - '*Get-ApplicationHost*'
      - '*Get-RegAlwaysInstallElevated*'
      - '*Get-Unconstrained*'
      - '*Add-RegBackdoor*'
      - '*Add-ScrnSaveBackdoor*'
      - '*Gupt-Backdoor*'
      - '*Invoke-ADSBackdoor*'
      - '*Enabled-DuplicateToken*'
      - '*Invoke-PsUaCme*'
      - '*Remove-Update*'
      - '*Check-VM*'
      - '*Get-LSASecret*'
      - '*Get-PassHashes*'
      - '*Show-TargetScreen*'
      - '*Port-Scan*'
      - '*Invoke-PoshRatHttp*'
      - '*Invoke-PowerShellTCP*'
      - '*Invoke-PowerShellWMI*'
      - '*Add-Exfiltration*'
      - '*Add-Persistence*'
      - '*Do-Exfiltration*'
      - '*Start-CaptureServer*'
      - '*Get-ChromeDump*'
      - '*Get-ClipboardContents*'
      - '*Get-FoxDump*'
      - '*Get-IndexedItem*'
      - '*Get-Screenshot*'
      - '*Invoke-Inveigh*'
      - '*Invoke-NetRipper*'
      - '*Invoke-EgressCheck*'
      - '*Invoke-PostExfil*'
      - '*Invoke-PSInject*'
      - '*Invoke-RunAs*'
      - '*MailRaider*'
      - '*New-HoneyHash*'
      - '*Set-MacAttribute*'
      - '*Invoke-DCSync*'
      - '*Invoke-PowerDump*'
      - '*Exploit-Jboss*'
      - '*Invoke-ThunderStruck*'
      - '*Invoke-VoiceTroll*'
      - '*Set-Wallpaper*'
      - '*Invoke-InveighRelay*'
      - '*Invoke-PsExec*'
      - '*Invoke-SSHCommand*'
      - '*Get-SecurityPackages*'
      - '*Install-SSP*'
      - '*Invoke-BackdoorLNK*'
      - '*PowerBreach*'
      - '*Get-SiteListPassword*'
      - '*Get-System*'
      - '*Invoke-BypassUAC*'
      - '*Invoke-Tater*'
      - '*Invoke-WScriptBypassUAC*'
      - '*PowerUp*'
      - '*PowerView*'
      - '*Get-RickAstley*'
      - '*Find-Fruit*'
      - '*HTTP-Login*'
      - '*Find-TrustedDocuments*'
      - '*Invoke-Paranoia*'
      - '*Invoke-WinEnum*'
      - '*Invoke-ARPScan*'
      - '*Invoke-PortScan*'
      - '*Invoke-ReverseDNSLookup*'
      - '*Invoke-SMBScanner*'
      - '*Invoke-Mimikittenz*'
      - '*Invoke-AllChecks*'
    false_positives:
    - Get-SystemDriveInfo
    condition: keywords and not false_positives
  falsepositives:
  - Penetration testing
  level: high

Querying Elasticsearch

Import Libraries



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from elasticsearch import Elasticsearch
from elasticsearch_dsl import Search
import pandas as pd

Initialize Elasticsearch client



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es = Elasticsearch(['http://helk-elasticsearch:9200'])
searchContext = Search(using=es, index='logs-endpoint-winevent-powershell-*', doc_type='doc')

Run Elasticsearch Query



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s = searchContext.query('query_string', query='(Message.keyword:(*Invoke\-DllInjection* OR *Invoke\-Shellcode* OR *Invoke\-WmiCommand* OR *Get\-GPPPassword* OR *Get\-Keystrokes* OR *Get\-TimedScreenshot* OR *Get\-VaultCredential* OR *Invoke\-CredentialInjection* OR *Invoke\-Mimikatz* OR *Invoke\-NinjaCopy* OR *Invoke\-TokenManipulation* OR *Out\-Minidump* OR *VolumeShadowCopyTools* OR *Invoke\-ReflectivePEInjection* OR *Invoke\-UserHunter* OR *Find\-GPOLocation* OR *Invoke\-ACLScanner* OR *Invoke\-DowngradeAccount* OR *Get\-ServiceUnquoted* OR *Get\-ServiceFilePermission* OR *Get\-ServicePermission* OR *Invoke\-ServiceAbuse* OR *Install\-ServiceBinary* OR *Get\-RegAutoLogon* OR *Get\-VulnAutoRun* OR *Get\-VulnSchTask* OR *Get\-UnattendedInstallFile* OR *Get\-ApplicationHost* OR *Get\-RegAlwaysInstallElevated* OR *Get\-Unconstrained* OR *Add\-RegBackdoor* OR *Add\-ScrnSaveBackdoor* OR *Gupt\-Backdoor* OR *Invoke\-ADSBackdoor* OR *Enabled\-DuplicateToken* OR *Invoke\-PsUaCme* OR *Remove\-Update* OR *Check\-VM* OR *Get\-LSASecret* OR *Get\-PassHashes* OR *Show\-TargetScreen* OR *Port\-Scan* OR *Invoke\-PoshRatHttp* OR *Invoke\-PowerShellTCP* OR *Invoke\-PowerShellWMI* OR *Add\-Exfiltration* OR *Add\-Persistence* OR *Do\-Exfiltration* OR *Start\-CaptureServer* OR *Get\-ChromeDump* OR *Get\-ClipboardContents* OR *Get\-FoxDump* OR *Get\-IndexedItem* OR *Get\-Screenshot* OR *Invoke\-Inveigh* OR *Invoke\-NetRipper* OR *Invoke\-EgressCheck* OR *Invoke\-PostExfil* OR *Invoke\-PSInject* OR *Invoke\-RunAs* OR *MailRaider* OR *New\-HoneyHash* OR *Set\-MacAttribute* OR *Invoke\-DCSync* OR *Invoke\-PowerDump* OR *Exploit\-Jboss* OR *Invoke\-ThunderStruck* OR *Invoke\-VoiceTroll* OR *Set\-Wallpaper* OR *Invoke\-InveighRelay* OR *Invoke\-PsExec* OR *Invoke\-SSHCommand* OR *Get\-SecurityPackages* OR *Install\-SSP* OR *Invoke\-BackdoorLNK* OR *PowerBreach* OR *Get\-SiteListPassword* OR *Get\-System* OR *Invoke\-BypassUAC* OR *Invoke\-Tater* OR *Invoke\-WScriptBypassUAC* OR *PowerUp* OR *PowerView* OR *Get\-RickAstley* OR *Find\-Fruit* OR *HTTP\-Login* OR *Find\-TrustedDocuments* OR *Invoke\-Paranoia* OR *Invoke\-WinEnum* OR *Invoke\-ARPScan* OR *Invoke\-PortScan* OR *Invoke\-ReverseDNSLookup* OR *Invoke\-SMBScanner* OR *Invoke\-Mimikittenz* OR *Invoke\-AllChecks*) AND (NOT \*.keyword:(*Get\-SystemDriveInfo*)))')
response = s.execute()
if response.success():
    df = pd.DataFrame((d.to_dict() for d in s.scan()))

Show Results



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df.head()