Kerberos Network Traffic RC4 Ticket Encryption
Detects kerberos TGS request using RC4 encryption which may be indicative of kerberoasting
Detection logic
selection
request_type: TGS
cipher: rc4-hmaccomputer_acct
service|startswith: $Condition
selection and not computer_acctRaw YAML
title: Kerberos Network Traffic RC4 Ticket Encryption
id: 503fe26e-b5f2-4944-a126-eab405cc06e5
status: test
description: Detects kerberos TGS request using RC4 encryption which may be indicative of kerberoasting
references:
- https://adsecurity.org/?p=3458
author: sigma
date: 2020-02-12
modified: 2021-11-27
tags:
- attack.credential-access
- attack.t1558.003
logsource:
product: zeek
service: kerberos
detection:
selection:
request_type: 'TGS'
cipher: 'rc4-hmac'
computer_acct:
service|startswith: '$'
condition: selection and not computer_acct
falsepositives:
- Normal enterprise SPN requests activity
level: mediumFalse positives
- Normal enterprise SPN requests activity