SigmaHQ/rules/windows/process_creation/win_susp_cli_escape.yml

title: Suspicious Commandline Escape
id: f0cdd048-82dc-4f7a-8a7a-b87a52b6d0fd
description: Detects suspicious process that use escape characters
status: experimental
references:
    - https://twitter.com/vysecurity/status/885545634958385153
    - https://twitter.com/Hexacorn/status/885553465417756673
    - https://twitter.com/Hexacorn/status/885570278637678592
    - https://www.fireeye.com/blog/threat-research/2017/06/obfuscation-in-the-wild.html
    - http://www.windowsinspired.com/understanding-the-command-line-string-and-arguments-received-by-a-windows-program/
author: juju4
date: 2018/12/11
modified: 2020/03/14
tags:
    - attack.defense_evasion
    - attack.t1140
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine:
            # - <TAB>   # no TAB modifier in sigmac yet, so this matches <TAB> (or TAB in elasticsearch backends without DSL queries)
            - '*h^t^t^p*'
            - '*h"t"t"p*'
    condition: selection
falsepositives:
    - False positives depend on scripts and administrative tools used in the monitored environment
level: low