I am trying to use powershell to download and execute a file with arguments:
. { iwr -useb https://github.com/int0x33/nc.exe/blob/master/nc64.exe?raw=true } | iex; <IP> 9001
I get this error:
Unexpected token '9001' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken
Any help appreciated.
Invoke-Expression (ie) is for interpreting and executing text as PowerShell code[1] - you can't use it to execute a binary download directly (which PowerShell fundamentally doesn't support).
Instead, use Invoke-WebRequest's (iwr's) -OutFile parameter to download the binary content to a local file and execute the latter:
iwr -useb https://github.com/int0x33/nc.exe/blob/master/nc64.exe?raw=true -OutFile ./nc64.exe
./nc64.exe $someIp 9001
[1] The obligatory warning: Invoke-Expression (iex) should generally be avoided and used only as a last resort, due to its inherent security risks. Superior alternatives are usually available. If there truly is no alternative, only ever use it on input you either provided yourself or fully trust - see this answer.
Related
I am playing around powershell the idea is simple:
I want to verify if certain TCP port is open.
Now, I can run this as PowerShell script or I can run it in ISE.
Now, in ISE everything is fine, the script runs as supposed to.
When I run it as PowerShell Script however, I am getting error message:
Method invocation failed because [System.Net.Sockets.TcpClient] does not contain a method named 'ReceiveTimeout'.
At P:\checkTCP80.ps1:7 char:1
+ $tcpClient.ReceiveTimeout(5)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : MethodNotFound
Code:
$servery = gc .\servers.txt
foreach ($server in $servery)
{
$tcpClient = New-Object System.Net.Sockets.TCPClient
$tcpClient.ReceiveTimeout(5)
$tcpClient.Connect($server,80)
Write-Host ($server, $tcpClient.Connected)
}
I have 2 questions:
How come, that the output parameter works just fine from ISE but does not work when this is launched as a script?
How to fix it?
According to the MS documentation on this class ReceiveTimeout is a property and not a method.
Try changing $tcpClient.ReceiveTimeout(5) to $tcpClient.ReceiveTimeout = 5
This code works from the Powershell command line but generates an error when run from a script:
$key = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced'
Set-ItemProperty $key Hidden 1
When I run it from my script, I get the following error:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer : The module 'HKEY_CURRENT_USER' could not be
loaded. For more information, run 'Import-Module HKEY_CURRENT_USER'.
At C:\Users\mybitch\Desktop\VSS-Customize-Desktop.ps1:19 char:6
+ $key=HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (HKEY_CURRENT_US...ersion\Explorer:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CouldNotAutoLoadModule
This is a simple assignment...Why would Powershell try to import HKEY_CURRENT_USER as a module? Why is the behavior so different from the Powershell command line?
The error message betrays the problem. In your script, apparently you are doing this:
$key = HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer
That is an invalid assignment. You should be doing as you describe:
$key = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced'
Make sure in the script you have the User Hive being loaded, for example if you are running it from a task scheduler you will need it to load a hive for it to have the effect that you want.
I am trying to use a script that ignores I/O errors on a HD, to copy whatever is good there into another HD.
I found this script here : http://81.165.15.172:1983/blog/2013/06/02/ignoring-device-io-errors-during-copy-with-powershell/comment-page-1/
(https://raw.github.com/DavorJ/PS-ForceCopy/master/Force-Copy.ps1)
that does just that...but i cant get it to work.
I am trying with command :
.\Force-Copy.ps1 -SourceFilePath "I:\Downloads\" -DestinationFilePath "H:\Downloads" -MaxRetries 6
but it gives me this weird error:
F:\SSDU\Desktop\Force-Copy.ps1 : Cannot validate argument on parameter 'SourceFilePath'. The "Test-Path -LiteralPath $_ -Type Leaf" validation script for the argument with value "I:\Downloads\" did not return true. Determine why the validation script failed and then try the command again.
At line:1 char:34
+ .\Force-Copy.ps1 -SourceFilePath "I:\Downloads\" -DestinationFilePath
"H:\Downlo ...
+ ~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Force-Copy.ps1], ParameterBind
ingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationError,Force-Copy.ps1
Anyone knows how to use this in win-8 64-bit ?
-Thanks
So, it's not a PowerShell solution, but for getting whatever you can off a dying drive I recommend using Roadkil's Unstoppable Copier. You can download it from the author at:
http://www.roadkil.net/program.php/P29/Unstoppable%20Copier
I have had good success with that one.
Having seen examples of BITS being used to transfer files from http addresses as well as regular windows file shares, I thought I'd test pulling and pushing to/from ftp. I used the below powershell commands:
Start-BitsTransfer `
-Source ftp://username:password#ftp.somewhere.com/file.zip `
-Destination c:\temp\file.zip
Start-BitsTransfer `
-Source c:\temp\file2.zip `
-Destination ftp://username:password#ftp.somewhere.com/file2.zip
In both cases I got the error:
Start-BitsTransfer : Cannot find drive. A drive with the name 'ftp' does not exist.
At c:\temp\bits2ftp.ps1:3 char:1
+ Start-BitsTransfer `
+ ~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : ObjectNotFound: (ftp:String) [Start-BitsTransfer], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : DriveNotFound,Microsoft.BackgroundIntelligentTransfer.Management.NewBitsTransferCommand
As such, I assume this isn't possible... however thought I'd post on here in case there is a way to do this (e.g. does it work on certain ftp servers)?
Also posting on here since I've seen no mention of anyone attempting this before, so thought I'd provide a Google hit for the next person to wonder.
So far as I can tell, FTP is not currently supported.
HTTP and HTTPS Download Server Requirements: http://msdn.microsoft.com/en-us/library/aa362846(v=vs.85).aspx
HTTP and HTTPS Upload Server (IIS) Requirements: http://msdn.microsoft.com/en-us/library/aa363130(v=vs.85).aspx
I should probably not ask a generic question with a specific example, but I have a hard time translating some basic commands from the PowerShell console to reusable functions and custom cmdlets. Is there a definitive guide to the syntax of PowerShell somewhere, with gotchas, hints and tips?
For instance, I'm trying to create a function in order to automate the administration of BizTalk Host instances. The following function does not work (fails at runtime) whereas each individual line works and performs as expected when individually pasted in a PowerShell console.
function AddNewHostInstance([string]$ServerName, [string]$HostName, [string]$Login, [string]$Password)
{
[System.Management.ManagementObject]$objServerHost = `
([WmiClass]"root/MicrosoftBizTalkServer:MSBTS_ServerHost").CreateInstance()
$objServerHost["ServerName"] = $ServerName
$objServerHost["HostName"] = $HostName
$objServerHost.Map()
$name = "Microsoft BizTalk Server " + $HostName + " " + $ServerName
[System.Management.ManagementObject]$objServerHost = `
([WmiClass]"root/MicrosoftBizTalkServer:MSBTS_HostInstance").CreateInstance()
$objHostInstance["Name"] = $name
$objHostInstance.Install($Login, $Password, $True)
}
By the way, the error I receive in this particular case is this one:
PS C:\Users\username> createHostInstances $server, $host, $user, $pwd
Exception calling "Map" : "Invalid parameter "
At line:14 char:39
+ $objServerHost.Map <<<< ()
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : WMIMethodException
Exception calling "Install" : "Instance of the WMI class is not found.
No instance was found with the specified key. This could be the result of the instance being deleted by another BizTalk Admin session."
At line:19 char:29
+ $objHostInstance.Install <<<< ($Login, $Password, $True)
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : WMIMethodException
PS C:\Users\username>
[Edit] After further investigation, it seems that the function does not like assigning properties to WMI object via a variable. If I hardcode all values (instead of relying on the supplied function parameters), then it works as expected !
Basically, this works:
# Using hard-coded value
$objServerHost["HostName"] = "TestHost"
Whereas this, does not:
# Using function supplied parameter
$objServerHost["HostName"] = $HostName
Still, I don't understand why...
As far as guides go, the best book out there is Windows PowerShell in Action by Bruce Payette. There is a second edition due in February but you can get early access to the electronic draft. There are also a couple of free books out there. Mastering PowerShell by Dr. Tobias Weltner and I also have a short < 60 pages eBook - Effective Windows PowerShell. This last one covers a number of gotchas as well as providing you with a mental model for how PowerShell works.
WRT the error, I wonder if you would have better luck using PowerShell's built-in support for WMI e.g.:
$namespace = 'root/MicrosoftBizTalkServer'
$host = Get-WmiObject -namespace $namespace -class MSBTS_HostInstance
See if the resulting WMI object has the appropriate data & methods (Map & Install):
$host | fl *
$host | Get-Member
Regarding the Map() error, sometimes with WMI you need to drop back and instead do $objServerHost.psbase.Invoke("Map"). Other than that, I've got a few sample PowerShell scripts for BizTalk administration you might find useful as guides.