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Suspicious Portable Executable Encoded in Powershell Scriptedit
This rule detects the presence of Portable Executables in a PowerShell Script by Looking for its encoded header. Attackers embed PEs into PowerShell Scripts for Injecting them into the memory, avoiding defenses by not writing to disk.,
Rule type: query
Rule indices:
- winlogbeat-*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Execution
Version: 1
Added (Elastic Stack release): 7.16.0
Rule authors: Elastic
Rule license: Elastic License v2
Rule queryedit
event.code:"4104" and powershell.file.script_block_text : ( TVqQAAMAAAAEAAAA )
Threat mappingedit
Framework: MITRE ATT&CKTM
-
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/