Detection rules › Sigma
Linux Package Uninstall
Detects linux package removal using builtin tools such as "yum", "apt", "apt-get" or "dpkg".
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | T1070 Indicator Removal |
Event coverage
| Provider | Event |
|---|---|
| Sysmon-for-Linux | Event ID 1 |
Rule body yaml
title: Linux Package Uninstall
id: 95d61234-7f56-465c-6f2d-b562c6fedbc4
status: test
description: Detects linux package removal using builtin tools such as "yum", "apt", "apt-get" or "dpkg".
references:
- https://sysdig.com/blog/mitre-defense-evasion-falco
- https://www.tutorialspoint.com/how-to-install-a-software-on-linux-using-yum-command
- https://linuxhint.com/uninstall_yum_package/
- https://linuxhint.com/uninstall-debian-packages/
author: Tuan Le (NCSGroup), Nasreddine Bencherchali (Nextron Systems)
date: 2023-03-09
tags:
- attack.stealth
- attack.t1070
logsource:
product: linux
category: process_creation
detection:
selection_yum:
Image|endswith: '/yum'
CommandLine|contains:
- 'erase'
- 'remove'
selection_apt:
Image|endswith:
- '/apt'
- '/apt-get'
CommandLine|contains:
- 'remove'
- 'purge'
selection_dpkg:
Image|endswith: '/dpkg'
CommandLine|contains:
- '--remove '
- ' -r '
selection_rpm:
Image|endswith: '/rpm'
CommandLine|contains: ' -e '
condition: 1 of selection_*
falsepositives:
- Administrator or administrator scripts might delete packages for several reasons (debugging, troubleshooting).
level: low
Stages and Predicates
Stage 0: condition
1 of selection_*Stage 1: selection_yum
selection_yum:
Image|endswith: '/yum'
CommandLine|contains:
- 'erase'
- 'remove'
Stage 2: selection_apt
selection_apt:
Image|endswith:
- '/apt'
- '/apt-get'
CommandLine|contains:
- 'remove'
- 'purge'
Stage 3: selection_dpkg
selection_dpkg:
Image|endswith: '/dpkg'
CommandLine|contains:
- '--remove '
- ' -r '
Stage 4: selection_rpm
selection_rpm:
Image|endswith: '/rpm'
CommandLine|contains: ' -e '
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | match |
|
Image | ends_with |
|