detection.wiki

Detection rules › Sigma

Bash Interactive Shell

Status
test
Severity
low
Log source
category process_creation, product linux
Author
@d4ns4n_
Source
github.com/SigmaHQ/sigma

Detects execution of the bash shell with the interactive flag "-i".

MITRE ATT&CK coverage

TacticTechniques
ExecutionNo specific technique

Telemetry coverage

PlatformRecord / event type
LinuxEvent ID 1: Process Create

Rule body

title: Bash Interactive Shell
id: 6104e693-a7d6-4891-86cb-49a258523559
status: test
description: Detects execution of the bash shell with the interactive flag "-i".
references:
    - https://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet
    - https://www.revshells.com/
    - https://linux.die.net/man/1/bash
author: '@d4ns4n_'
date: 2023-04-07
tags:
    - attack.execution
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/bash'
        CommandLine|contains: ' -i '
    condition: selection
falsepositives:
    - Unknown
level: low

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Image|endswith: '/bash'
    CommandLine|contains: ' -i '

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • -i
field:"CommandLine" kind:match value:" -i "
Imageends_with
  • /bash
field:"Image" kind:ends_with value:"/bash"