mirror of
https://github.com/valitydev/SigmaHQ.git
synced 2024-11-07 17:58:52 +00:00
31 lines
978 B
YAML
31 lines
978 B
YAML
title: AWS EC2 Startup Shell Script Change
|
|
id: 1ab3c5ed-5baf-417b-bb6b-78ca33f6c3df
|
|
status: experimental
|
|
description: Detects changes to the EC2 instance startup script. The shell script will be executed as root/SYSTEM every time the specific instances are booted up.
|
|
author: faloker
|
|
date: 2020/02/12
|
|
modified: 2020/09/01
|
|
references:
|
|
- https://github.com/RhinoSecurityLabs/pacu/blob/master/modules/ec2__startup_shell_script/main.py#L9
|
|
logsource:
|
|
service: cloudtrail
|
|
detection:
|
|
selection_source:
|
|
- eventSource: ec2.amazonaws.com
|
|
selection_userdata:
|
|
- requestParameters.userData: "*"
|
|
selection_eventname:
|
|
- eventName: ModifyInstanceAttribute
|
|
condition: all of them
|
|
falsepositives:
|
|
- Valid changes to the startup script
|
|
level: high
|
|
tags:
|
|
- attack.execution
|
|
- attack.t1059.001
|
|
- attack.t1086 # an old one
|
|
- attack.t1059.003
|
|
- attack.t1059.004
|
|
- attack.t1059 # an old one
|
|
- attack.t1064 # an old one
|