Potential Process Injection via PowerShell

Elastic Stack Serverless Security

Detects the use of Windows API functions that are commonly abused by malware and security tools to load malicious code or inject it into remote processes.

Rule type: query

Rule indices:

• winlogbeat-*
• logs-windows.*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

• https://github.com/EmpireProject/Empire/blob/master/data/module_source/management/Invoke-PSInject.ps1
• https://github.com/EmpireProject/Empire/blob/master/data/module_source/management/Invoke-ReflectivePEInjection.ps1
• https://github.com/BC-SECURITY/Empire/blob/master/empire/server/data/module_source/credentials/Invoke-Mimikatz.ps1

Tags:

• Elastic
• Host
• Windows
• Threat Detection
• Defense Evasion

Version: 1

Rule authors:

• Elastic

Rule license: Elastic License v2

event.category:process and
  powershell.file.script_block_text : (
   (VirtualAlloc or VirtualAllocEx or VirtualProtect or LdrLoadDll or LoadLibrary or LoadLibraryA or
      LoadLibraryEx or GetProcAddress or OpenProcess or OpenProcessToken or AdjustTokenPrivileges) and
   (WriteProcessMemory or CreateRemoteThread or NtCreateThreadEx or CreateThread or QueueUserAPC or
      SuspendThread or ResumeThread)
  )

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Defense Evasion
  • ID: TA0005
  • Reference URL: https://attack.mitre.org/tactics/TA0005/

• Technique:

  • Name: Process Injection
  • ID: T1055
  • Reference URL: https://attack.mitre.org/techniques/T1055/

• Sub-technique:

  • Name: Dynamic-link Library Injection
  • ID: T1055.001
  • Reference URL: https://attack.mitre.org/techniques/T1055/001/

• Sub-technique:

  • Name: Portable Executable Injection
  • ID: T1055.002
  • Reference URL: https://attack.mitre.org/techniques/T1055/002/