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Fix Linux Buffer Overflow Attempts detection to correctly use regexes #5134

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Fix Linux Buffer Overflow Attempts detection to correctly use regexes #5134

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9254918
Fix detection to correctly use regexes
kelnage Dec 18, 2024
bbf9f89
Fix indentation of list items
kelnage Dec 18, 2024
1836dce
Update lnx_buffer_overflows.yml
nasbench Dec 18, 2024
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12 changes: 7 additions & 5 deletions rules/linux/builtin/lnx_buffer_overflows.yml
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Original file line number Diff line number Diff line change
@@ -1,22 +1,24 @@
title: Buffer Overflow Attempts
id: 18b042f0-2ecd-4b6e-9f8d-aa7a7e7de781
status: stable
status: experimental
description: Detects buffer overflow attempts in Unix system log files
references:
- https://github.com/ossec/ossec-hids/blob/1ecffb1b884607cb12e619f9ab3c04f530801083/etc/rules/attack_rules.xml
author: Florian Roth (Nextron Systems)
date: 2017-03-01
modified: 2024-12-18
tags:
- attack.t1068
- attack.privilege-escalation
logsource:
product: linux
detection:
keywords:
- 'attempt to execute code on stack by'
- 'FTP LOGIN FROM .* 0bin0sh'
- 'rpc.statd[\d+]: gethostbyname error for'
- 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
'|re':
- 'attempt to execute code on stack by'
- 'FTP LOGIN FROM .* 0bin0sh'
- 'rpc.statd[\d+]: gethostbyname error for'
- 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
condition: keywords
falsepositives:
- Unknown
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