March 2025 - Threatninja.net

29 Mar, 2025

Hack The Box: BlockBlock Machine Walkthrough – Hard Difficulty

Hard Machine Authentication Bypass, BurpSuite, Challenges, Ethereum Classic Exploit, Forge Binary Privilege Escalation, HackTheBox, JSON-RPC Vulnerability, JWT Token Extraction, Linux, Pacman Package Manager Misconfiguration, Penetration Testing, ssh, XSS Attack

This walkthrough examines the BlockBlock machine from Hack The Box, classified as a medium-difficulty challenge. The assessment began with the exploitation of an XSS vulnerability, which facilitated credential theft through the Ethereum JSON-RPC API, granting SSH access. Privilege escalation was achieved by leveraging the forge binary to obtain higher privileges, followed by exploiting a misconfigured pacman package manager to gain root access. This engagement underscores the critical importance of securing APIs, implementing robust input validation, and enforcing strict privilege escalation controls to mitigate security risks.

#HackTheBox #CyberSecurity #PenetrationTesting #CTF #EthicalHacking #XSS #PrivilegeEscalation #BlockchainSecurity …

Learn MoreHack The Box: BlockBlock Machine Walkthrough – Hard Difficulty

22 Mar, 2025

Hack The Box: Alert Machine Walkthrough – Easy Difficulty

Easy Machine Apache, Challenges, HackTheBox, hashcat, hashid, Linux, Markdown, Penetration Testing, port forwarding, pwncat-cs, python3, XSS

We discovered an XSS vulnerability in .md file uploads and the Contacts tab. By embedding an XSS payload and sharing the link, we extracted data from messages.php, revealing a file parameter vulnerable to LFI. This led us to /var/www/statistics.alert.htb/.htpasswd, which contained a hashed password. Using hashid, we identified it as MD5 (APR1-MD5) and cracked it with Hashcat, retrieving the password ManchesterUnited. With these credentials, we accessed the system and captured the user flag.

After logging into statistics.alert.htb, we found port 8080 open. Using SSH port forwarding, we accessed a monitoring site but needed to locate its directory. Checking ps aux, we found it in /opt/website-monitor. We confirmed file access by testing a basic PHP file, which worked. We then uploaded a PentestMonkey reverse shell, but it didn’t execute. To ensure success, we crafted a reliable PHP shell, triggered it, and gained root access.

🔍 #CyberSecurity #BugBounty #EthicalHacking #PenTesting #CTF #HTB #WebSecurity #XSS #LFI #PrivilegeEscalation #Hacking …

Learn MoreHack The Box: Alert Machine Walkthrough – Easy Difficulty

15 Mar, 2025

Hack The Box: Certified Machine Walkthrough – Medium Difficulty

Medium Machine Active Directory Exploitation, Bloodhound, Certificate Services Exploitation, Certipy, Cybersecurity, evil-winrm, Hack The Box, Penetration Testing, Privilege Escalation, Red Teaming, SMB & Kerberos Attacks, Windows, Windows Security

Access is gained using Judith Mader’s credentials, allowing enumeration of network resources. CrackMapExec identifies key accounts like management_svc and ca_operator. Privilege escalation is performed using a Shadow Credentials attack with Certipy, taking control of management_svc. With valid credentials, Evil-WinRM establishes a remote session, leading to the user flag.

For root access, the attack exploits Active Directory Certificate Services by modifying ca_operator’s User Principal Name (UPN) to Administrator, enabling a privileged certificate request. A vulnerable ESC9 certificate is issued without linking back to ca_operator, effectively granting Administrator access. The UPN is restored to avoid detection, and authentication via Kerberos retrieves the NT hash of the Administrator account. Full system control is confirmed by obtaining the root flag.

#HackTheBox #Pentesting #ActiveDirectory #PrivilegeEscalation #CyberSecurity #EthicalHacking …

Learn MoreHack The Box: Certified Machine Walkthrough – Medium Difficulty

8 Mar, 2025

Hack The Box: Chemistry Machine Walkthrough – Easy Difficulty

Easy Machine BurpSuite, Challenges, CIF, Crystallographic Information File (CIF), CVE-2024-23346, HackTheBox, Linux, Penetration Testing, sqlite3

A vulnerability in **Pymatgen (CVE-2024-23346)** allowed for **Remote Code Execution (RCE)** through a **malicious CIF file**. By injecting code into the **_space_group_magn.transform_BNS_Pp_abc** field and uploading it to the dashboard, nothing happened initially. However, clicking the **View button** triggered execution, leading to a **reverse shell**. With remote access secured, an **SQLite3 database** was explored, revealing **password hashes**, which were cracked to obtain valid credentials and retrieve the **user flag**.

Further exploration uncovered an **aiohttp/3.9.1** service running on **port 8080**, restricting access to the **assets directory** with a **403 Forbidden** response. Leveraging an **LFI attack**, an **SSH key** was extracted, allowing for **privilege escalation** and access to the **root flag**.

This scenario highlights the importance of **sanitizing file uploads, restricting directory access, and keeping dependencies updated** to mitigate security risks.

#CyberSecurity #BugBounty #EthicalHacking #PrivilegeEscalation #RedTeam #WebSecurity #InfoSec #CTF …

Learn MoreHack The Box: Chemistry Machine Walkthrough – Easy Difficulty

1 Mar, 2025

Hack The Box: Instant Machine Walkthrough – Medium Difficulty

Medium Machine Android, API, apktool, Challenges, HackTheBox, Linux, Penetration Testing, python3, Solar-PuTTY, ssh, SSH key, swagger

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