Detection rules › Sigma
Python Spawning Pretty TTY Via PTY Module
Detects a python process calling to the PTY module in order to spawn a pretty tty which could be indicative of potential reverse shell activity.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution |
Telemetry coverage
| Platform | Record / event type |
|---|---|
| Linux | Event ID 1: Process Create |
Rule body
title: Python Spawning Pretty TTY Via PTY Module
id: c4042d54-110d-45dd-a0e1-05c47822c937
related:
- id: 32e62bc7-3de0-4bb1-90af-532978fe42c0
type: similar
status: test
description: |
Detects a python process calling to the PTY module in order to spawn a pretty tty which could be indicative of potential reverse shell activity.
references:
- https://www.volexity.com/blog/2022/06/02/zero-day-exploitation-of-atlassian-confluence/
author: Nextron Systems
date: 2022-06-03
modified: 2024-11-04
tags:
- attack.execution
- attack.t1059
logsource:
category: process_creation
product: linux
detection:
selection_img:
- Image|endswith:
- '/python'
- '/python2'
- '/python3'
- Image|contains:
- '/python2.' # python image is always of the form ../python3.10; ../python is just a symlink
- '/python3.'
selection_cli_import:
CommandLine|contains:
- 'import pty'
- 'from pty '
selection_cli_spawn:
CommandLine|contains: 'spawn'
condition: all of selection_*
falsepositives:
- Unknown
level: medium
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- Image|endswith:
- '/python'
- '/python2'
- '/python3'
- Image|contains:
- '/python2.'
- '/python3.'
Stage 2: selection_cli_import
selection_cli_import:
CommandLine|contains:
- 'import pty'
- 'from pty '
Stage 3: selection_cli_spawn
selection_cli_spawn:
CommandLine|contains: 'spawn'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | ends_with |
| field:"Image" kind:ends_with |
Image | match |
| field:"Image" kind:match |