IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Suspicious .NET Reflection via PowerShell
editSuspicious .NET Reflection via PowerShell
editThis rule detects the use of Reflection.Assembly to load PEs and DLLs in memory in Powershell Scripts. Attackers use this method to load executables and DLLs without writing to the disk, bypassing security solutions.
Rule type: query
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Defense Evasion
Version: 1
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editevent.category:process and
powershell.file.script_block_text : (
"[System.Reflection.Assembly]::Load" or
"[Reflection.Assembly]::Load"
)
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/
-
Tactic:
- Name: Execution
- ID: TA0002
- Reference URL: https://attack.mitre.org/tactics/TA0002/
-
Technique:
- Name: Command and Scripting Interpreter
- ID: T1059
- Reference URL: https://attack.mitre.org/techniques/T1059/
-
Sub-technique:
- Name: PowerShell
- ID: T1059.001
- Reference URL: https://attack.mitre.org/techniques/T1059/001/