Detection rules › Sigma
Print History File Contents
Detects events in which someone prints the contents of history files to the commandline or redirects it to a file for reconnaissance
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Reconnaissance | T1592.004 Gather Victim Host Information: Client Configurations |
Event coverage
| Provider | Event |
|---|---|
| Sysmon-for-Linux | Event ID 1 |
Rule body yaml
title: Print History File Contents
id: d7821ff1-4527-4e33-9f84-d0d57fa2fb66
status: test
description: Detects events in which someone prints the contents of history files to the commandline or redirects it to a file for reconnaissance
references:
- https://github.com/sleventyeleven/linuxprivchecker/
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1552.003/T1552.003.md
author: Florian Roth (Nextron Systems)
date: 2022-06-20
modified: 2022-09-15
tags:
- attack.reconnaissance
- attack.t1592.004
logsource:
category: process_creation
product: linux
detection:
selection:
Image|endswith:
- '/cat'
- '/head'
- '/tail'
- '/more'
selection_history:
- CommandLine|contains:
- '/.bash_history'
- '/.zsh_history'
- CommandLine|endswith:
- '_history'
- '.history'
- 'zhistory'
condition: all of selection*
falsepositives:
- Legitimate administration activities
level: medium
Stages and Predicates
Stage 0: condition
all of selection*Stage 1: selection
selection:
Image|endswith:
- '/cat'
- '/head'
- '/tail'
- '/more'
Stage 2: selection_history
selection_history:
- CommandLine|contains:
- '/.bash_history'
- '/.zsh_history'
- CommandLine|endswith:
- '_history'
- '.history'
- 'zhistory'
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 | ends_with |
|
CommandLine | match |
|
Image | ends_with |
|