Nishang allows you to convert an exe to hex, then reassemble the hex into the original exe using PowerShell. I have seen group policies that do not allow for the transfer of exes through the RDP clipboard. Although it provides basic protection, it sometimes still allows the ability to copy text through the clipboard. In this scenario, you would be able to copy across the Nishang PowerShell source to a file on the box and rename the extension to. The Nishang script you want to copy is TexttoExe.
You can download Nishang here. Open the evil. Then paste the contents to the target machine using the RDP clipboard. Do the same with the contents of the TexttoExe. C sharp compiler csc is the command line compiler included with Microsoft.
NET installations within Windows. This could be useful if you are unable to copy over an executable file, but can still copy over text. Using this method, combined with SQL injection, can move an exe to a box without having to try to bypass egress filters or authenticated proxies that might block outbound connectivity.
Using the following example code, the compiled executable will use cmd. Hopefully this blog has given you viable options for getting your files malicious or otherwise over to a server. Learn More. We help organizations defend against adversaries by being the best at simulating real-world, sophisticated adversaries with the products, services, and training we provide.
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This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Read More. Back 15 Ways to Download a File. June 16, Ryan Gandrud. Technical Blog Network Penetration Testing. PowerShell File Download PowerShell is one of those scripting languages that can be overlooked as a threat by administrators.
Stream" xHttp. Send with bStrm. Connect and share knowledge within a single location that is structured and easy to search. There are several ways, but the easiest is probably OpenURI.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 11 years, 11 months ago. Active 6 years, 7 months ago. Viewed 17k times. Markus Markus 1 1 gold badge 3 3 silver badges 4 4 bronze badges. Add a comment. Active Oldest Votes. FWIW some people think that open-uri is dangerous because it monkeypatches all code, including library code, that uses open with a new ability that the calling code might not anticipate.
You shouldn't be trusting user input passed to open anyway, but you need to be doubly careful now. Pavel Chuchuva Overbryd Overbryd 3, 1 1 gold badge 28 28 silver badges 28 28 bronze badges. I agree with Nikkolasg. I just tried to use it and it works very well. I modified it a bit though, for example, the local path will be deduced automatically from the URL given, so e.
This would be the best answer, but open-uri DOES load the whole file in memory stackoverflow. SimonPerepelitsa hehe. I revised it yet again, now providing a concise download-to-file method that does not read the whole response in memory. So you were kind-a-right but not. The revised answer cleans up this misunderstanding and hopefully serves as a great example on the power of Ruby : — Overbryd.
If you get an EACCES: permission denied error when changing the filename with mv command its because you have to close the file first. Suggest changing that part to Tempfile then io. Show 2 more comments. More complex cases are shown further down in the same document.
Arkku Arkku Here's the link specifically: ruby-doc. Add a comment. Felix 3, 2 2 gold badges 26 26 silver badges 41 41 bronze badges. KrauseFx KrauseFx 11k 6 6 gold badges 44 44 silver badges 52 52 bronze badges. This reads the whole file into memory before writing it to disk, so That said, if you're OK with that, a shorter version assuming url and filename are in variables url and file , respectively , using open-uri as in the first: File.
Dead simple, for the trivial download case. Expanding on Dejw's answer edit2 : File. Sorry, but I don't know a more elegant way of having Ruby wait for the buffer to fill. Edit: This is a version that automatically adjusts itself to keep the buffer just at or below capacity.
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