I'm trying to write a perl script that determines which users are currently logged into Windows by using query.exe (c:\Windows\system32\query.exe). Perl is unable to access this file, unable to execute it, even unable to see that it exists, as I've found with the following code:
print `dir c:\\windows\\system32\\query*`;
This produces the following output:
07/13/2009 05:16 PM 1,363,456 Query.dll
1 File(s) 1,363,456 bytes
0 Dir(s) 183,987,658,752 bytes free
I've checked the user executing the script using perl's getlogin function, and it returns the name of a member of the local Administrators group (specifically, me). I've also tried adding read/execute permissions for "Everyone", but windows keeps giving me access denied errors when I try to modify this file's permissions. Finally, I've tried running perl.exe as an administrator but that doesn't fix the problem either.
Is this something I can solve by changing some settings in Windows? Do I need to add something to my perl script? Or is there just no way to grant perl access to some of these processes?
On my 64 bit machine I can find query.exe in Windows\System32 (the 64 bit system directory) but not in Windows\SysWOW64 (the 32 bit system directory).
I suspect that you are running 64 bit Windows and 32 bit Perl and so, under WOW64 emulation, the 32 bit Perl process redirects system32 to SysWOW64.
Since system32 should be in your path you ought to be able to execute it by executing query.exe without any path. If you absolutely have to refer to the 64 bit system folder then you can do so from a 32 bit process with C:\Windows\sysnative.
If my suspicions are correct I recommend you do some reading up on WOW64 because it can be pretty confusing until you get on top of it. On the other hand, if you already know all about it I apologise for being patronising.
Related
I have been studying privilege escalation on windows and came across some powershell script that look up vulnderabilties.
When i run these ( multiple scripts) I get no output while the documentation i find on them and video's all show output. Unless I specifically tell it to output it to a file,
This makes me think it has something to do with my system. I am running windows 7 64-bit on a local standard user.
For example i used:
https://github.com/rasta-mouse/Sherlock
and:
https://github.com/PowerShellEmpire/PowerTools/tree/master/PowerUp
Did you try to check if your current user has changed to Administrator ?Maybe there is a GPO or theses privileges esclations are not working for your version
I'm pretty new to powershell integration in Jenkins and my scripts won't run because (I believe) I need powershell to be executed in 64 bit. Running:
[Environment]::Is64BitProcess
in my execution sequence yields false an then a cmdlet that I use (Get-WindowsFeature) is shown as not recognized as a cmdlet, etc. Any way to execute 64 bit powershell scripts?
Thanks!
Environment
Jenkins on Windows (mine happens to run as a service)
plus Powershell plugin (for running Powershell scripts as "build steps")
Jenkins will typically call upon the correct version of powershell.exe. However, the executor/slave process must be running a 64-bit JRE so that PowerShell can also operate in 64-bit mode.
A simple tester project with the following Powershell script can show the above 32-bit vs 64-bit nature:
$env:Path # Path will have the right Powershell available
[intptr]::size # outputs: 4 = 32-bit, 8 = 64-bit
Stop-WebAppPool FOOBAR # fails when 32-bit, succeeds when 64-bit
Console output example (extra blank lines for clarity):
[Powershell Test] $ powershell.exe -NonInteractive -ExecutionPolicy ByPass "& 'C:\Windows\TEMP\hudson123456789.ps1'"
C:\Windows\system32;C:\Windows;C:\Windows\System32\WindowsPowerShell\v1.0\
4
Stop-WebAppPool : Retrieving the COM class factory for component with CLSID
{688EEEE5-6A7E-422F-B2E1-6AF00DC944A6} failed due to the following error:
80040154 Class not registered (Exception from HRESULT: 0x80040154
(REGDB_E_CLASSNOTREG)).
At C:\Windows\TEMP\hudson123456789.ps1:7 char:1
Solution
tl;dr... Install 64-bit JRE, and configure Jenkins to be 64-bit.
I used chocolatey to install a fairly recent JRE, via "Administrator" PowerShell:
First, install chocolatey:
iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))
Looked for the latest version available https://chocolatey.org/packages?q=java (chocolatey has multiple packages for the same thing, often not kept fully up to date).
Then, install JRE (using the one with the higher JRE number):
choco install -y javaruntime
Or:
choco install -y jre8
Finally, I edited my jenkins.xml configuration so that it would run using the 64-bit JRE instead of the built-in JRE.
Changed:
<executable>%BASE%\jre\bin\java</executable>
To (set the path as appropriate for your instance):
<executable>C:\Program Files\Java\jre1.8.0_66\bin\java</executable>
This one should be an "always fresh" symlink (handled by system updates) that ought to allow your Jenkins instance to survive Restart and Update events:
<executable>C:\ProgramData\Oracle\Java\javapath\java.exe</executable>
Then I restarted Jenkins. Powershell execution woke up to the might of 64-bits. Note: I am using a single Jenkins instance that does double duty as the "server" and "execution slave" at the same time. For fully autonomous slaves, I would suppose doing whatever to get the slave-agents processes in 64-bit mode would result in a similar success.
Full automation? According to the chocolatey "jre8" package documentation, using command line switches, it's even be possible to force fixed destination paths for JRE, and exclude 32-bit and/or 64-bit editions, if fully automated non-interactive steps are needed. https://chocolatey.org/packages/jre8
I am not familiar with Jenkins, but it seems like it's a 32 bit process itself.
Can you specify the location of the PowerShell executable? If so, try to use this path:
C:\Windows\SysNative\WindowsPowerShell\v1.0\powershell.exe
If you can't do that, then you might be able to do it in code in your "execution sequence" with Invoke-Command:
Invoke-Command -ComputerName . -ScriptBlock { [Environment]::Is64BitProcess }
All the code in the scriptblock will be run in a separate 64 bit process and the results will be serialized and returned.
Explanations
Paths
On a 32 bit Windows OS, the system folder is C:\Windows\System32.
On a 64 bit Windows OS, the 64 bit system folder is also C:\Windows\System32. But the system folder for 32 bit processes on a 64 bit Windows installation is in fact C:\Windows\SysWOW64.
For compatibility, a 32 bit process on a 64 bit OS will have any calls to C:\Windows\System32 transparently redirected to C:\Windows\SysWOW64, unbeknownst to the process.
To enable a 32 bit process to reference the real System32 on a 64 bit OS, you can you use C:\Windows\SysNative.
Since PowerShell has a 32 bit and a 64 bit version, and it lives inside the system folders, you need to use the above rules to reference the correct executable depending on whether you're calling it from a 64 or 32 bit process.
The typical scenario (you want to call the version of the same bitness) is easiest (just call powershell.exe or reference it via System32), but it gets hairy if you want to reference the other version.
Invoke-Command Method
The Invoke-Command cmdlet lets you run code, typically on another computer, but you can run it on the same computer as well. This will spawn a completely separate process, and any output gets serialized and sent back to the calling process.
The caveat to this method is that you must enable PowerShell remoting on the machine, via Enable-PSRemoting or Group Policy (shameless self plug).
The default profile (Microsoft.PowerShell) that you connect to on a 64 bit machine will be a 64 bit version of PowerShell, regardless of the OS of the caller.
Incidentally, if you wanted to use Invoke-Command to connect to a 32 bit version, you could do so by explicitly specifying the profile Microsoft.PowerShell32.
OK, so the answer was pretty simple, yet maddening all at once. Basically, the module(s) didn't exist in both of the Powershell paths (x86 and x64), so copying the modules over to the 32-bit powershell environment fixed the issue.
further suggestions:
check path of 32bit-JRE, remove path or uninstall 32bit-JRE --
also swapping path-position with 64bit-JRE might work
check path(s) of PowerShell, remove path of 32bit PowerShell
(..\SysWOW64\..) and add the other one to the path (..\System32\..)
This worked for me!
I've installed ActiveState Perl on my new Windows 10 PC. I've installed the same exact version of Perl on several of my own PC's, and it's installed on 100's of other users' PC's in my company. Same exact install, created by me.
This is the first time trying this on Windows 10. The basic actions of double-clicking a Perl script (*.pl) in Explorer cause a console window to open and Perl to run the script.
Also, in Windows Command Prompt, I can type perl.exe script.pl, and the script runs fine. But, when I just type script.pl, nothing happens. No output, no errors, no perl.exe processes visible in Task Manager.
The first time I ran a Perl script (from Windows Command Prompt, I believe, using just the script.pl syntax), Windows popped up a window asking me what program I wanted to use to open this file. Perl was the default, and I clicked OK.
I've never seen that window in Windows 7 or 8, so I'm thinking it's something specific to Windows 10, and that it's the thing that's somehow preventing me from just typing script.pl. Because, when launching script.pl, I'm requiring the file associations to pick the right program, but when I type perl.exe script.pl, perl.exe is being launched directly. But, that Windows 10 "pick your default program" thing is getting in the way when running from the command prompt by messing up the file associations.
Not 100% sure why it works from Explorer, though, but I'm pretty sure that I need to clear that default program thing. I removed the registry entry for .pl files under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts, but that didn't help.
This seems to be a more generic problem with Windows 10, or possibly just my installation of it, or a Group Policy I'm not aware of.
The following commands (run in a Admin command prompt) work fine in Windows 8.1 but not Windows 10:
assoc .foo=Foobar
ftype Foobar=C:\WINDOWS\system32\foo.bat %1
echo #echo off > foo.bat
echo echo The filename is %1 >> foo.bat
echo hi > foo.foo
foo.foo
The result should be the output:
The filename is C:\WINDOWS\system32\foo.foo
But Windows 10 does nothing. It seems to only allow built-in apps to be associated in this manner, and not BAT scripts of downloaded/installed EXEs.
Turns out that Microsoft reversed the polarity of a Registry setting in Windows 10, and this is biting other Perl programmers too. The solutions is to set HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\InheritConsoleHandles to "0".
MSDN post here: https://social.msdn.microsoft.com/Forums/en-US/f19d740d-21c8-4dc2-a9ab-d5c0527e932b/nasty-file-association-regression-bug-in-windows-10-console
Make sure your PATHEXT environment variable has .pl in it.
I'm pretty new to powershell integration in Jenkins and my scripts won't run because (I believe) I need powershell to be executed in 64 bit. Running:
[Environment]::Is64BitProcess
in my execution sequence yields false an then a cmdlet that I use (Get-WindowsFeature) is shown as not recognized as a cmdlet, etc. Any way to execute 64 bit powershell scripts?
Thanks!
Environment
Jenkins on Windows (mine happens to run as a service)
plus Powershell plugin (for running Powershell scripts as "build steps")
Jenkins will typically call upon the correct version of powershell.exe. However, the executor/slave process must be running a 64-bit JRE so that PowerShell can also operate in 64-bit mode.
A simple tester project with the following Powershell script can show the above 32-bit vs 64-bit nature:
$env:Path # Path will have the right Powershell available
[intptr]::size # outputs: 4 = 32-bit, 8 = 64-bit
Stop-WebAppPool FOOBAR # fails when 32-bit, succeeds when 64-bit
Console output example (extra blank lines for clarity):
[Powershell Test] $ powershell.exe -NonInteractive -ExecutionPolicy ByPass "& 'C:\Windows\TEMP\hudson123456789.ps1'"
C:\Windows\system32;C:\Windows;C:\Windows\System32\WindowsPowerShell\v1.0\
4
Stop-WebAppPool : Retrieving the COM class factory for component with CLSID
{688EEEE5-6A7E-422F-B2E1-6AF00DC944A6} failed due to the following error:
80040154 Class not registered (Exception from HRESULT: 0x80040154
(REGDB_E_CLASSNOTREG)).
At C:\Windows\TEMP\hudson123456789.ps1:7 char:1
Solution
tl;dr... Install 64-bit JRE, and configure Jenkins to be 64-bit.
I used chocolatey to install a fairly recent JRE, via "Administrator" PowerShell:
First, install chocolatey:
iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1'))
Looked for the latest version available https://chocolatey.org/packages?q=java (chocolatey has multiple packages for the same thing, often not kept fully up to date).
Then, install JRE (using the one with the higher JRE number):
choco install -y javaruntime
Or:
choco install -y jre8
Finally, I edited my jenkins.xml configuration so that it would run using the 64-bit JRE instead of the built-in JRE.
Changed:
<executable>%BASE%\jre\bin\java</executable>
To (set the path as appropriate for your instance):
<executable>C:\Program Files\Java\jre1.8.0_66\bin\java</executable>
This one should be an "always fresh" symlink (handled by system updates) that ought to allow your Jenkins instance to survive Restart and Update events:
<executable>C:\ProgramData\Oracle\Java\javapath\java.exe</executable>
Then I restarted Jenkins. Powershell execution woke up to the might of 64-bits. Note: I am using a single Jenkins instance that does double duty as the "server" and "execution slave" at the same time. For fully autonomous slaves, I would suppose doing whatever to get the slave-agents processes in 64-bit mode would result in a similar success.
Full automation? According to the chocolatey "jre8" package documentation, using command line switches, it's even be possible to force fixed destination paths for JRE, and exclude 32-bit and/or 64-bit editions, if fully automated non-interactive steps are needed. https://chocolatey.org/packages/jre8
I am not familiar with Jenkins, but it seems like it's a 32 bit process itself.
Can you specify the location of the PowerShell executable? If so, try to use this path:
C:\Windows\SysNative\WindowsPowerShell\v1.0\powershell.exe
If you can't do that, then you might be able to do it in code in your "execution sequence" with Invoke-Command:
Invoke-Command -ComputerName . -ScriptBlock { [Environment]::Is64BitProcess }
All the code in the scriptblock will be run in a separate 64 bit process and the results will be serialized and returned.
Explanations
Paths
On a 32 bit Windows OS, the system folder is C:\Windows\System32.
On a 64 bit Windows OS, the 64 bit system folder is also C:\Windows\System32. But the system folder for 32 bit processes on a 64 bit Windows installation is in fact C:\Windows\SysWOW64.
For compatibility, a 32 bit process on a 64 bit OS will have any calls to C:\Windows\System32 transparently redirected to C:\Windows\SysWOW64, unbeknownst to the process.
To enable a 32 bit process to reference the real System32 on a 64 bit OS, you can you use C:\Windows\SysNative.
Since PowerShell has a 32 bit and a 64 bit version, and it lives inside the system folders, you need to use the above rules to reference the correct executable depending on whether you're calling it from a 64 or 32 bit process.
The typical scenario (you want to call the version of the same bitness) is easiest (just call powershell.exe or reference it via System32), but it gets hairy if you want to reference the other version.
Invoke-Command Method
The Invoke-Command cmdlet lets you run code, typically on another computer, but you can run it on the same computer as well. This will spawn a completely separate process, and any output gets serialized and sent back to the calling process.
The caveat to this method is that you must enable PowerShell remoting on the machine, via Enable-PSRemoting or Group Policy (shameless self plug).
The default profile (Microsoft.PowerShell) that you connect to on a 64 bit machine will be a 64 bit version of PowerShell, regardless of the OS of the caller.
Incidentally, if you wanted to use Invoke-Command to connect to a 32 bit version, you could do so by explicitly specifying the profile Microsoft.PowerShell32.
OK, so the answer was pretty simple, yet maddening all at once. Basically, the module(s) didn't exist in both of the Powershell paths (x86 and x64), so copying the modules over to the 32-bit powershell environment fixed the issue.
further suggestions:
check path of 32bit-JRE, remove path or uninstall 32bit-JRE --
also swapping path-position with 64bit-JRE might work
check path(s) of PowerShell, remove path of 32bit PowerShell
(..\SysWOW64\..) and add the other one to the path (..\System32\..)
This worked for me!
I’m looking for a way to check the remaining free space on a disk within Perl. I can’t use CPAN since I have to deploy the script on many servers with different versions of Perl, and I can’t change it because my team leader ordered me that way.
Any idea? I tried File::stat but I can’t use it on D:\ (the script runs on Windows versions).
Thanks!
fsutil volume diskfree C:
For Windows servers you can run this cmd command from system() method.