Purplesharp Invalid Users Kerberos Xml

Date: 2022-09-08 ID: 8d6bfa7a-0a19-4beb-8f19-6e9e1ba56f5a Author: Mauricio Velazco Environment: attack_range Directory: purplesharp_invalid_users_kerberos_xml

Description

Automated generation of attack data using PurpleSharp: Kerberos Password Spraying with 50 randomly generated usernames

MITRE ATT&CK Techniques

ID	Technique	Tactic
T1110.003	Password Spraying	Credential Access

Environment Details

Field	Value
Environment	attack_range
Directory	purplesharp_invalid_users_kerberos_xml
Test Date	2022-09-08

Datasets

The following datasets were collected during this attack simulation:

Windows-Security

Path: /datasets/attack_techniques/T1110.003/purplesharp_invalid_users_kerberos_xml/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 Multiple Invalid Users Fail To Authenticate Using Kerberos	`TTP`	Endpoint	T1110.003	Active Directory Password Spraying, Active Directory Kerberos Attacks, Volt Typhoon
Windows Unusual Count Of Invalid Users Fail To Auth Using Kerberos	`Anomaly`	Endpoint	T1110.003	Active Directory Password Spraying, Active Directory Kerberos Attacks, Volt Typhoon
Detect Password Spray Attempts	`TTP`	Application	T1110.003	Compromised User Account, Active Directory Password Spraying

Usage Instructions

Replay with Splunk Attack Data

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

1python replay.py --dataset /datasets/attack_techniques/T1110.003/purplesharp_invalid_users_kerberos_xml/windows-security.log --index attack_data

Manual Import

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

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

Source: GitHub | Version: 1.0