2025 - Page 3 of 6 - Threatninja.net

2 Aug, 2025

Hack The Box: Code Machine Walkthrough – Easy Difficulity

Easy Machine BurpSuite, Challenges, HackTheBox, hashtag, json, Linux, Penetration Testing, python3, sqliite3, ssh

Successfully exploited a code execution vulnerability in a web application by bypassing keyword restrictions through Python class enumeration, leading to a reverse shell as the app-production user and retrieval of the user.txt flag. Leveraged access to a SQLite database to crack credentials for the martin user and escalate privileges. Identified a backup script running with root privileges, crafted a malicious JSON payload to include the root directory in backups, and ultimately obtained the root.txt flag.

This engagement highlights the importance of secure input validation, credential management, and careful privilege delegation in application security.

#Cybersecurity #HackTheBox #CTF #PenetrationTesting #PrivilegeEscalation #ApplicationSecurity …

Learn MoreHack The Box: Code Machine Walkthrough – Easy Difficulity

26 Jul, 2025

Hack The Box: Cypher Machine Walkthrough – Medium Difficultyy

Medium Machine bbot, BurpSuite, Challenges, Cypher Injection, gobuster, HackTheBox, jadx-gui, jar, Linux, neo4j, Penetration Testing, python3

19 Jul, 2025

Hack The Box: Scepter Machine Walkthrough – Hard Difficulty

Hard Machine ADCS, Bloodhound, bloodyAD, Certipy, Challenges, ESC14, ESC9, evil-winrm, HackTheBox, hashcat, ldapsearch, nfs, openssl, Penetration Testing, showmount, Windows

I conquered the “Scepter” machine on Hack The Box, a challenging Active Directory exploit! Initially, I cracked weak .pfx certificate passwords using pfx2john and rockyou.txt. After syncing time, I extracted D.BAKER’s NTLM hash via Certipy and used BloodHound to reveal A.CARTER’s password reset privileges, exploiting ESC9 to capture the user flag. Subsequently, H.BROWN’s access to P.ADAMS’s altSecurityIdentities enabled an ESC14 attack, forging a certificate for passwordless authentication. Consequently, P.ADAMS’s DCSync rights allowed domain hash extraction, securing the root flag via Evil-WinRM.

#Cybersecurity #HackTheBox #ActiveDirectory #PrivilegeEscalation #CTF #EthicalHacking …

Learn MoreHack The Box: Scepter Machine Walkthrough – Hard Difficulty

12 Jul, 2025

Hack The Box: Dog Machine Walkthrough (Easy Difficulty)

Easy Machine Backdrop, bee, BurpSuite, Challenges, command injection, CVE-2024-41709, git-dumper, HackTheBox, Linux, Penetration Testing, PHP, pwncat-cs, reverse shell

5 Jul, 2025

Hack The Box: Cat Machine Walkthrough – Medium Diffculity

Medium Machine BurpSuite, Challenges, command injection, Cross Site Scripting, git-dumper, Gitea, gobuster, HackTheBox, hashcat, Linux, Penetration Testing, port forwarding, source code review, SQL, SQL Injection, sqlite3, ssh

Hack The Box Success: Cat Machine Write-Up Published!

I’ve just published my personal write-up for the Cat machine on Hack The Box. In this challenge, I gained the user flag by exploiting a Stored XSS vulnerability to capture the admin session cookie, followed by an SQL Injection to extract credentials and gain SSH access. For the root flag, I took advantage of a vulnerable image processing script owned by root, crafting a payload to gain a root shell and retrieve the flag. The full write-up dives into each step, the logic behind the attacks, and key takeaways.

#CyberSecurity #HackTheBox #PenetrationTesting #EthicalHacking #CTF #WriteUp #XSS #SQLi #PrivilegeEscalation #InfoSec #CTFWriteup …

Learn MoreHack The Box: Cat Machine Walkthrough – Medium Diffculity

2 Jul, 2025

Abusing Sudo’s chroot: CVE-2025-32463 Explained

Uncategorized

CVE-2025-32463 – Local Privilege Escalation via Sudo’s chroot Option
I recently explored a vulnerability in Sudo that allows unprivileged users to escalate to root by abusing the rarely used -R (chroot) feature and manipulating nsswitch.conf. Tested on Parrot OS, this PoC demonstrates how easy it is to gain root shell access when Sudo < 1.9.17p1 is installed. If you're running Linux, patch immediately or compile Sudo from source to version 1.9.17p1 or later. Stay safe, patch early. #CyberSecurity #Linux #CVE2025 #PrivilegeEscalation #InfoSec #ExploitDevelopment #Sudo #BlueTeam #RedTeam #ParrotOS #ThreatHunting #VulnerabilityResearch …

Learn MoreAbusing Sudo’s chroot: CVE-2025-32463 Explained

28 Jun, 2025

Hack The Box: Haze Machine Walkthrough – Hard Difficulty

Hard Machine Active Directory, Bloodhound, bloodyAD, Certipy, Challenges, CVE-2024-36991, evil-winrm, HackTheBox, Linux, Local File Inclusion (LFI), NetExec, Penetration Testing, pywhisker, Splunk, splunksecrets, SweetPotato

New Write-Up Published: Haze [Medium | Windows | Active Directory] – Hack The Box

Just released a walkthrough for Haze, a medium-difficulty Windows machine on Hack The Box. Initial access was obtained by exploiting CVE-2024-36991, a local file inclusion vulnerability in Splunk, to extract LDAP credentials. This enabled a Shadow Credentials attack using PyWhisker and Certipy, allowing lateral movement to a high-privileged domain user. For privilege escalation, I utilized Splunk admin access to deploy a reverse shell via a crafted app package. Upon gaining shell access, I escalated privileges to NT SYSTEM by abusing SeImpersonatePrivilege with SweetPotato. This box offers great insight into chained Active Directory abuse and Splunk misconfigurations.

#HackTheBox #RedTeam #ActiveDirectory #Splunk #CVE202436991 #ShadowCredentials #PrivilegeEscalation #SweetPotato #CTF #InfoSec #WriteUp #CyberSecurity …

Learn MoreHack The Box: Haze Machine Walkthrough – Hard Difficulty

21 Jun, 2025

Hack The Box: Titanic Machine Walkthrough – Easy Difficulty

Easy Machine BurpSuite, Challenges, CVE-2024-41817, directory traversal, HackTheBox, ImageMagick, Linux, Penetration Testing, python3, ssh

Just wrapped up a detailed walkthrough of the Hack The Box Titanic machine — an easy-rated challenge packed with valuable learning opportunities!

The journey started with exploiting a directory traversal vulnerability to access sensitive Gitea configuration files and extract user credentials. From there, I gained SSH access as the developer user and retrieved the user flag.

Privilege escalation was achieved by exploiting a critical ImageMagick vulnerability (CVE-2024-41817) in a writable directory, allowing arbitrary code execution via a crafted shared library. I also discovered the developer user had unrestricted sudo privileges, providing a straightforward path to root.

#HackTheBox #CyberSecurity #Pentesting #CTF #PrivilegeEscalation #LinuxSecurity #ImageMagick #CVE202441817 #EthicalHacking #DirectoryTraversal

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Learn MoreHack The Box: Titanic Machine Walkthrough – Easy Difficulty

14 Jun, 2025

Hack The Box: Inflitrator Machine Walkthrough – Insane Difficulity

Insane Machine bitlocker, Bloodhound, BloodHoundCE, bloodyAD, BurpSuite, Certipy, Challenges, evil-winrm, HackTheBox, hashcat, impacket, john the ripper, kerbrute, Output Messenger, Penetration Testing, RDP, sqlite3, Windows, Wireshark

Successfully completed a two-stage Active Directory exploitation scenario involving both user access and privilege escalation. The first stage focused on identifying accounts that did not require Kerberos pre-authentication (AS-REP Roasting), allowing extraction and cracking of a user password hash to gain remote access and retrieve the user flag. In the second stage, a misconfigured certificate template (ESC4 vulnerability) within Active Directory Certificate Services was exploited to request a certificate impersonating a privileged user. This enabled full administrative access and retrieval of the root flag.

#CyberSecurity #ActiveDirectory #RedTeam #Kerberos #PrivilegeEscalation #ASREP #ADCS #ESC4 #PenetrationTesting #Infosec #HackTheBox #WindowsSecurity #CTF
Successfully completed a two-stage Active Directory exploitation scenario involving both user access and privilege escalation. The first stage focused on identifying accounts that did not require Kerberos pre-authentication (AS-REP Roasting), allowing extraction and cracking of a user password hash to gain remote access and retrieve the user flag. In the second stage, a misconfigured certificate template (ESC4 vulnerability) within Active Directory Certificate Services was exploited to request a certificate impersonating a privileged user. This enabled full administrative access and retrieval of the root flag.

#CyberSecurity #ActiveDirectory #RedTeam #Kerberos #PrivilegeEscalation #ASREP #ADCS #ESC4 #PenetrationTesting #Infosec #HackTheBox #WindowsSecurity #CTF
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Learn MoreHack The Box: Inflitrator Machine Walkthrough – Insane Difficulity

7 Jun, 2025

Hack The Box: Backfire Machine Walkthrough – Medium Difficulty

Medium Machine Challenges, CVE-2024-41570, HackTheBox, Havoc C2, iptables, iptables-save, jwt, Linux, Penetration Testing, port forwarding, python3, ssh

Successfully rooted another Hack The Box machine by chaining multiple vulnerabilities across custom C2 frameworks. For the user flag, we exploited an SSRF vulnerability (CVE-2024-41570) in the Havoc C2 framework to access internal services, which we then chained with an authenticated RCE to execute arbitrary commands and gain a reverse shell as the ilya user. To maintain stable access, SSH keys were added for persistence, allowing us to retrieve the user.txt flag. For the root flag, we targeted the Hardhat C2 service by forging a valid JWT with a Python script to create an admin user, which provided shell access as sergej. Upon privilege escalation analysis, we found that sergej had sudo access to the iptables-save binary. This was abused to overwrite the /etc/sudoers file and escalate to root, ultimately retrieving the root.txt flag. Another great learning experience on the path to mastering offensive security!

#HackTheBox #CyberSecurity #InfoSec #RedTeam #CTF #PrivilegeEscalation #RCE #SSRF #Linux #HTB #EthicalHacking #PenetrationTesting #HavocC2 #HardhatC2 #JWT #SudoExploit #OSCP #BugBounty …

Learn MoreHack The Box: Backfire Machine Walkthrough – Medium Difficulty

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Yearly Archives: 2025