54 lines
1.4 KiB
YAML
54 lines
1.4 KiB
YAML
title: Encoded IEX
|
|
author: Florian Roth
|
|
date: 2019/08/23
|
|
description: Detects a base64 encoded IEX command string in a process command line
|
|
detection:
|
|
SELECTION_1:
|
|
EventID: 1
|
|
SELECTION_10:
|
|
CommandLine: '*pZXggKE5ld*'
|
|
SELECTION_11:
|
|
CommandLine: '*SUVYIChOZX*'
|
|
SELECTION_12:
|
|
CommandLine: '*lFWCAoTmV3*'
|
|
SELECTION_13:
|
|
CommandLine: '*JRVggKE5ld*'
|
|
SELECTION_2:
|
|
CommandLine: '*SUVYIChb*'
|
|
SELECTION_3:
|
|
CommandLine: '*lFWCAoW*'
|
|
SELECTION_4:
|
|
CommandLine: '*JRVggKF*'
|
|
SELECTION_5:
|
|
CommandLine: '*aWV4IChb*'
|
|
SELECTION_6:
|
|
CommandLine: '*lleCAoW*'
|
|
SELECTION_7:
|
|
CommandLine: '*pZXggKF*'
|
|
SELECTION_8:
|
|
CommandLine: '*aWV4IChOZX*'
|
|
SELECTION_9:
|
|
CommandLine: '*lleCAoTmV3*'
|
|
condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3 or SELECTION_4 or SELECTION_5
|
|
or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9 or SELECTION_10
|
|
or SELECTION_11 or SELECTION_12 or SELECTION_13))
|
|
falsepositives:
|
|
- unknown
|
|
fields:
|
|
- CommandLine
|
|
- ParentCommandLine
|
|
id: 88f680b8-070e-402c-ae11-d2914f2257f1
|
|
level: critical
|
|
logsource:
|
|
category: process_creation
|
|
product: windows
|
|
modified: 2020/08/29
|
|
status: experimental
|
|
tags:
|
|
- attack.execution
|
|
- attack.t1059.001
|
|
- attack.t1086
|
|
yml_filename: win_encoded_iex.yml
|
|
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
|
|
|