mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
P4T12ICK
63 lines
2.3 KiB
YAML
63 lines
2.3 KiB
YAML
name: Linux Setuid Using Setcap Utility
|
|
id: 9d96022e-6250-11ec-9a19-acde48001122
|
|
version: 1
|
|
date: '2021-12-21'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: Anomaly
|
|
description: This analytic looks for suspicious setcap utility execution to enable
|
|
SUID bit. This allows a user to temporarily gain root access, usually in order to
|
|
run a program. For example, only the root account is allowed to change the password
|
|
information contained in the password database; If the SUID bit appears as an s,
|
|
the file's owner also has execute permission to the file; if it appears as an S,
|
|
the file's owner does not have execute permission. The second specialty permission
|
|
is the SGID, or set group id bit. It is similar to the SUID bit, except it can temporarily
|
|
change group membership, usually to execute a program. The SGID bit is set if an
|
|
s or an S appears in the group section of permissions.
|
|
data_source:
|
|
- Sysmon Event ID 1
|
|
search:
|
|
selection1:
|
|
CommandLine: '*setcap *'
|
|
selection2:
|
|
Image|endswith: setcap
|
|
selection3:
|
|
CommandLine: '* cap_setuid='
|
|
condition: (selection1 or selection2) and selection3
|
|
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://www.hackingarticles.in/linux-privilege-escalation-using-capabilities/
|
|
tags:
|
|
analytic_story:
|
|
- Linux Privilege Escalation
|
|
- Linux Persistence Techniques
|
|
asset_type: Endpoint
|
|
confidence: 70
|
|
impact: 70
|
|
message: A commandline $process$ that may set suid or sgid on $dest$
|
|
mitre_attack_id:
|
|
- T1548.001
|
|
- T1548
|
|
observable:
|
|
- name: dest
|
|
type: Hostname
|
|
role:
|
|
- Victim
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
risk_score: 49
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1548.001/linux_setcap/sysmon_linux.log
|
|
source: Syslog:Linux-Sysmon/Operational
|
|
sourcetype: sysmon_linux
|