Ctf Tutorial

Ctf Tutorial. Infosec Train’s Capture the Flag (CTF) Training is an excellent opportunity to learn industry experts’ ethical hacking skills CTF training program comprises of various tasks and challenges to polish the problemsolving abilities of candidates The training emphasizes upskilling their existing knowledge regarding Penetration testing and provides them with handson practical experience to.

CTF (Capture The Flag) is a kind of information security competition that challenges contestants to solve a variety of tasks ranging from a scavenger hunt on wikipedia to basic programming exercises to hacking your way into a server to steal data In these challenges the contestant is usually asked to find a specific piece of text that may be hidden on the server or behind a webpage This.

CTF 101

CTF Capture The FlagWhy CTF?Types of Capture The Flag ChallengeChallenge Types & ToolsWebPracticeCTF Capture the Flag is a type of information security competition that challenges competitors to solve a variety of tasks It is a special type of cybersecurity competition designed to challenge computer participants to solve computer security problems or capture and defend computer systems Typically these competitions are teambased and attract a diverse range of participants including students enthusiasts and professionals A CTF competition may take a few hours a full day or several days Computer security represents a challenge for education due to its interdisciplinary nature The topics of computer security range from theoretical aspects of computer technology to applied aspects of information technology management This makes it difficult to encapsulate the feeling of constituting computer security professionals JEOPARDY STYLE Jeopardystyle CTFs have a couple of tasks in a range of categories For example web forensics crypto binary or anything else The team can gain some points for each solved task More points usually for more complex tasks The next task in the series can only be opened after some team resolves the previous task Then the playing time is more than the sum of digits which shows you the CTF winner ATTACK DEFENSE STYLE Attackdefense is another interesting type of competition Every team here has its own network (or only one host) with rude services Your team has time to patch your services and usually develop adventures So then the organizers add the contest participants and the battle begins! You should protect your own services for defense points and hack opponents for attack points MIXED STYLE Possible formats for mixed competitions may vary This can be something like a wargame with specific times for taskbased elements CTF games often touch on many other aspects of information security cryptography stenography binary analysis reverse arranging mobile security and others Cryptography In the case of CTFs the goal is usually to crack or clone cryptographic objects or algorithms to reach the flag 1 FeatherDuster— An automated modular cryptanalysis tool 2 Hash Extender— A utility tool for performing hash length extension attacks 3 PkCrack— A tool for Breaking PkZipencryption 4 RSATool— Generate private key with knowledge of p and q 5 XORTool— A tool to analyze multibyte xor cipher Steganography In the context of CTFs steganography usually involves finding the hints or flags that have been hidden with steganography Most commonly a media file will be given as a task with no further instructions and the participants have to be able to uncover the message that has been encoded in the media 1 Steghide— Hide data in various kind of images 2 Stegsolve— Apply various steganography techniques to images 3 Zsteg— PNG/BMP analysis 4 Exiftool— Read and write meta information in files 5 P Web challenges in CTF competitions usually involve the use of HTTP (or similar protocols) and technologies involved in information transfer and display over the internet like PHP CMS’s (eg Django) SQL Javascript and more 1 BurpSuite— A graphical tool to testing website security 2 Postman— Add on for chrome for debugging network requests 3 Raccoon— A highperformance offensive security tool for reconnaissance and vulnerability scanning 4 SQLMap— Automatic SQL injection and database takeover tooli 5 W3af— Web Application Attack and Audit Framework [+] How to start CTF [+] Starter CTF.

A Beginner's Guide to Capture the flag (CTF) Hacking

Step 1Step 2Step 3Step 4Step 5Step 6SourcesAfter downloading the file server VM it will be our victim or we run it in VirtualBox Now the first step is to find out its IP address On Kali — the attacker machine — I am using this command The netdiscovercommand output can be seen in the screenshot Our next step is to find the open ports and services available on the victim machine For that I have used an nmap fullport scan for this purpose Here is the output The command we are using is nmap p 192168121 sV There are a lot of open ports and services available on the target machine I used this command for sVswitch for enumerating the version information of the identified services This will help us identify vulnerable services to exploit We are good to go by exploring the open ports and services on the target machine And the FTP port 21 was open We are decided to start form there I tried to connect to the victim machine’s FTP service by guessing common credentials and one worked Commands used ftp 192168121 ls Credentials 1 Username ftp 2 Password (none) As we know that we can now have the FTP access on the target machine I run the lscommand to see the list of files and directories available for default user I learn that there was one empty directory available on the target machine I am trying to exploring the “pub” directory for further contents but that was a dead end After that I checked the vsFTPd version As we know from Step 2 above there is one more FTP port available on the target machine Let’s check the FTP service on port 2121 I started with enumerating the FTP login with some default credentials and one of them worked Credentials 1 Username anonymous 2 Password anonymous As we can see above we’ve got the anonymous user FTP access on port 2121 by using default credentials This time it worked for me as I was able to view the contents of files on the target machine I used the lscommand and was able to list the contents of the “log” directory from there I tried to look for an available exploit for the FTP service running through this port The FTP version which is running on this port was ProFTPD 135 Server I found some useful exploits on Google for this version of the FTP service After exploring the FTP ports to get into the target machine I shifted my attention to the HTTP port 80 I opened the target machine IP address into the browser and there was a simple webpage I chose the niktovulnerability scanner which is by default available on Kali Linux and is used for scanning the host for webbased files and vulnerabilities As we can see there is an interesting text file available on the target machine When I opened this file on the browser there was a password mentioned We have explored the FTP ports and HTTP port but there are still five open ports remaining to be checked Next I started with the SMB service which was running on the port 445 on the target machine I used the smbmaputility which is available in Kali Linux by default It is basically used to enumerate the SMB server SSH on port 22 was open on the target machine so I tried to login to the target machine with the username and password through SSH The same username and password with the FTP service on port 21 and this time it worked as I was able to log into the target system through FTP After logging into FTP I used the pwdcommand to check the current directory It showed that the current directory was “/home/smbuser” In the next step we will use this information for gaining user access on the target machine This completes this CTF challenge We hope you learned a lot from it!.

How to get started in CTF Complete Begineer Guide by

CTF stands for “capture the flag” It’s a hacking competition where the challenges (or a hacking environment or both) are set up for you to hack Once you successfully solve a challenge or hack something you get a “flag” which is a specially formatted piece of text You can then submit that flag for points&mldr the player or team with the most points wins!.