mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
57 lines
2.0 KiB
YAML
57 lines
2.0 KiB
YAML
name: Linux Sudoers Tmp File Creation
|
|
id: be254a5c-63e7-11ec-89da-acde48001122
|
|
version: 1
|
|
date: '2021-12-23'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: Anomaly
|
|
description: This analytic is to looks for file creation of sudoers.tmp file cause
|
|
by editing /etc/sudoers using visudo or editor in linux platform. This technique
|
|
may abuse by adversaries, malware author and red teamers to gain elevated privilege
|
|
to targeted or compromised host. /etc/sudoers file controls who can run what commands
|
|
as what users on what machines and can also control special things such as whether
|
|
you need a password for particular commands. The file is composed of aliases (basically
|
|
variables) and user specifications (which control who can run what).
|
|
data_source:
|
|
- Sysmon Event ID 11
|
|
search:
|
|
selection1:
|
|
TargetFilename: '*sudoers.tmp*'
|
|
condition: selection1
|
|
how_to_implement: To successfully implement this search, you need to be ingesting
|
|
logs with the process name, parent process, and command-line executions from your
|
|
endpoints. If you are using Sysmon, you can use the Add-on for Linux Sysmon from
|
|
Splunkbase.
|
|
known_false_positives: administrator or network operator can execute this command.
|
|
Please update the filter macros to remove false positives.
|
|
references:
|
|
- https://forum.ubuntuusers.de/topic/sudo-visudo-gibt-etc-sudoers-tmp/
|
|
tags:
|
|
analytic_story:
|
|
- Linux Privilege Escalation
|
|
- Linux Persistence Techniques
|
|
asset_type: Endpoint
|
|
confidence: 90
|
|
impact: 80
|
|
message: A file $file_name$ is created in $file_path$ on $dest$
|
|
mitre_attack_id:
|
|
- T1548.003
|
|
- T1548
|
|
observable:
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
risk_score: 72
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1548.003/sudoers_temp/sysmon_linux.log
|
|
source: Syslog:Linux-Sysmon/Operational
|
|
sourcetype: sysmon_linux
|