Potential Password Reconnaissance Via Findstr.EXE

Description

Detects command line usage of "findstr" to search for the "passwords" keyword in a variety of different languages

Query · sigma

selection_img:
- Image|endswith: \findstr.exe
- OriginalFileName: FINDSTR.EXE
selection_cli:
  CommandLine|contains:
  - contraseña
  - hasło
  - heslo
  - parola
  - passe
  - passw
  - senha
  - senord
  - 密碼
condition: all of selection_*

Known false positives

  • Unknown
Raw source Potential Password Reconnaissance Via Findstr.EXE · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Potential Password Reconnaissance Via Findstr.EXE
id: 1a0f6f16-2099-4753-9a02-43b6ac7a1fa5
status: test
description: Detects command line usage of "findstr" to search for the "passwords" keyword in a variety of different languages
references:
    - https://steflan-security.com/windows-privilege-escalation-credential-harvesting/
    - https://adsecurity.org/?p=2288
author: Josh Nickels
date: 2023-05-18
tags:
    - attack.credential-access
    - attack.t1552.001
    - detection.threat-hunting
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\findstr.exe'
        - OriginalFileName: 'FINDSTR.EXE'
    selection_cli:
        CommandLine|contains:
            - 'contraseña' # Spanish
            - 'hasło' # Polish
            - 'heslo' # Czech
            - 'parola' # Italian
            - 'passe' # French
            - 'passw' # German, English
            - 'senha' # Portuguese
            - 'senord' # Swedish
            - '密碼' # Cantonese
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

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