GitHub Repo

Encoded Powershell

Date: 2021-01-19 ID: cc9b264d-efc9-11eb-926b-550bf0943fbb Author: Patrick Bareiss Environment: attack_range Directory: encoded_powershell

Description

Manual generation of encoded powershell command

MITRE ATT&CK Techniques

ID Technique Tactic
T1059.001 PowerShell Execution

Environment Details

Field Value
Environment attack_range
Directory encoded_powershell
Test Date 2021-01-19

Datasets

The following datasets were collected during this attack simulation:

Explorer_spawns_windows-Sysmon

  • Path: /datasets/attack_techniques/T1059.001/encoded_powershell/explorer_spawns_windows-sysmon.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

Padded_windows-Sysmon

  • Path: /datasets/attack_techniques/T1059.001/encoded_powershell/padded_windows-sysmon.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

Windows-Sysmon

  • Path: /datasets/attack_techniques/T1059.001/encoded_powershell/windows-sysmon.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

Windows-Security

  • Path: /datasets/attack_techniques/T1059.001/encoded_powershell/windows-security.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Security

The following detections in our security content repository use this attack data for testing:

Detection Name Type Source MITRE ATT&CK Analytic Story
Windows Explorer.exe Spawning PowerShell or Cmd Hunting Endpoint T1059.001, T1204.002 ZDI-CAN-25373 Windows Shortcut Exploit Abused as Zero-Day
Malicious PowerShell Process - Execution Policy Bypass Anomaly Endpoint T1059.001 DHS Report TA18-074A, Volt Typhoon, China-Nexus Threat Activity, AsyncRAT, HAFNIUM Group, Salt Typhoon, XWorm, DarkCrystal RAT, 0bj3ctivity Stealer, APT37 Rustonotto and FadeStealer
Windows Explorer LNK Exploit Process Launch With Padding TTP Endpoint T1059.001, T1204.002 ZDI-CAN-25373 Windows Shortcut Exploit Abused as Zero-Day

Usage Instructions

Replay with Splunk Attack Data

Replay attack data with replay.py from Splunk Attack Data.

1python replay.py --dataset /datasets/attack_techniques/T1059.001/encoded_powershell/explorer_spawns_windows-sysmon.log --index attack_data

Manual Import

  1. Download the dataset files from the paths listed above
  2. Configure your Splunk instance with the appropriate sourcetypes
  3. Import the logs using the Splunk Add Data wizard

Related Content

Find more detections and analytics for this attack technique in our security content repository.

Source: GitHub | Version: 1.0