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Some Images and one technique Added #5118

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Some Images and one technique Added #5118

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743e4c4
Some Images and one technique Added
CheraghiMilad Dec 10, 2024
f29fa5f
fix condition issue
CheraghiMilad Dec 10, 2024
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20 changes: 14 additions & 6 deletions rules/linux/process_creation/proc_creation_lnx_cat_sudoers.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -4,25 +4,33 @@ status: test
description: Detects the execution of a cat /etc/sudoers to list all users that have sudo rights
references:
- https://github.com/sleventyeleven/linuxprivchecker/
author: Florian Roth (Nextron Systems)
author: Florian Roth (Nextron Systems), CheraghiMilad
date: 2022-06-20
modified: 2022-09-15
modified: 2024-12-10
tags:
- attack.reconnaissance
- attack.t1592.004
logsource:
category: process_creation
product: linux
detection:
selection:
selection_1:
Image|endswith: '/visudo'
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visudo is the correct way to edit the file.
The purpose of the rule is to detect unusual access.

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In some cases of adversaries Emulation, i use the visudo for reading the sudoers file, and my team can not detected it, my aim enrichment the rules for increase coverage.

selection_2:
Image|endswith:
- '/grep'
- '/cat'
- 'grep'
- '/ed'
- '/head'
- '/tail'
- '/more'
- '/nano'
- '/tail'
- '/less'
- '/vi'
- '/vim'
- '/emacs'
CommandLine|contains: ' /etc/sudoers'
condition: selection
condition: 1 of selection_*
falsepositives:
- Legitimate administration activities
level: medium
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