Closed YamatoSecurity closed 1 month ago
@fukusuket
I noticed an issue when creating rules. It is a low priority issue but would be better to generate an error to make it easier to understand and avoid incorrect rules.
The following rule works correctly:
title: PW Guessing id: 23179f25-6fce-4827-bae1-b219deaf563e related: - id: 35e8a0fc-60c2-46d7-ba39-aafb15b9854e type: obsolete status: test description: Detects password guessing attacks references: https://attack.mitre.org/techniques/T1110/003/ author: Zach Mathis date: 2024-10-13 modified: 2024-10-13 tags: - attack.t1110.003 - attack.credential_access correlation: type: event_count rules: - incorrect_password group-by: - TargetUserName - TargetDomainName - IpAddress - WorkstationName - LogonType - ProcessName - LogonProcessName timespan: 5m condition: gte: 5 falsepositives: - User mistyping password level: medium ruletype: Hayabusa --- title: Failed Logon - Incorrect Password id: 5b0b75dc-9190-4047-b9a8-14164cee8a31 name: incorrect_password related: - id: 35e8a0fc-60c2-46d7-ba39-aafb15b9854e type: obsolete status: test description: Detects a failed logon event due to a wrong password references: author: Zach Mathis date: 2024-10-13 modified: 2024-10-13 tags: logsource: product: windows service: security detection: selection: Channel: Security EventID: 4625 SubStatus: "0xc000006a" #Wrong password filter: IpAddress: "-" condition: selection and not filter falsepositives: level: informational ruletype: Hayabusa
However, when i change:
rules: - incorrect_password
to
rules: - incorrect_password_does_not_exist
OR
rules: - 5b0b75dc-9190-4047-b9a8-14164cee8a39 # this ID also does not exist
Hayabusa will not give a parsing error and will scan as if everything is fine. (Scanning with the info rule instead)
info
I would like to give the error The referenced rule was not found: incorrect_password_does_not_exist in order to make it easier to write rules.
The referenced rule was not found: incorrect_password_does_not_exist
I see, It is better to have an error! I will fix it!💪
@fukusuket
I noticed an issue when creating rules. It is a low priority issue but would be better to generate an error to make it easier to understand and avoid incorrect rules.
The following rule works correctly:
However, when i change:
to
OR
Hayabusa will not give a parsing error and will scan as if everything is fine. (Scanning with the
info
rule instead)I would like to give the error
The referenced rule was not found: incorrect_password_does_not_exist
in order to make it easier to write rules.