Florian Roth
31 lines
799 B
YAML
31 lines
799 B
YAML
title: Encoded FromBase64String
|
|
id: fdb62a13-9a81-4e5c-a38f-ea93a16f6d7c
|
|
status: test
|
|
description: Detects a base64 encoded FromBase64String keyword in a process command line
|
|
author: Florian Roth
|
|
date: 2019/08/24
|
|
modified: 2022/03/07
|
|
logsource:
|
|
category: process_creation
|
|
product: windows
|
|
detection:
|
|
selection:
|
|
- CommandLine|base64offset|contains: '::FromBase64String'
|
|
# UTF-16 LE
|
|
- CommandLine|contains:
|
|
- 'OgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQAUwB0AHIAaQBuAGcA'
|
|
- 'oAOgBGAHIAbwBtAEIAYQBzAGUANgA0AFMAdAByAGkAbgBnA'
|
|
- '6ADoARgByAG8AbQBCAGEAcwBlADYANABTAHQAcgBpAG4AZw'
|
|
condition: selection
|
|
fields:
|
|
- CommandLine
|
|
- ParentCommandLine
|
|
falsepositives:
|
|
- Unknown
|
|
level: high
|
|
tags:
|
|
- attack.defense_evasion
|
|
- attack.t1140
|
|
- attack.execution
|
|
- attack.t1059.001
|