🕳️
The Cyber Security Library
  • The Library
  • Offensive Security
    • Solar, Exploiting log4j
      • Reconnaissance
      • Discovery
      • Proof of Concept
      • Exploitation
    • Basic Authentication Bypass
      • Username Enumeration
      • Brute Force
      • Logic Flaw
      • Cookie Tampering
    • Insekube
      • Recon with Nmap
      • Checking out the web address
      • Creating a Reverse shell
      • Inside the Kubernetes pod
      • CVE-2021-43798
    • Snort
      • What is Snort? (For the uninitiated)
      • Task exercise
      • Traffic Generator
      • Brief overview of IDS and IPS
      • Checking Snort
      • Snort Sniffer mode
      • Packet Logger mode
    • Runtime Detection Evasion
      • Learning Objectives of AMSI
      • Runtime detections
      • AMSI Overview
      • AMSI Instrumentation
      • Powershell Downgrade
      • Powershell Reflection
      • Patching AMSI
    • Red team recon using OSINT
      • Taxonomy of Reconnaissance
      • Built-in tools
      • Advanced Searching
      • Specialized Search Engines
  • Malware
    • Introduction to Malware Analysis
      • What are the different types of malware analysis
      • Doing different types of analysis
      • Anti analysis techniques
    • Ransomeware: Maze
    • Exploring Steganography
    • Simple Trojan with Python
      • The Python Trojan
      • Breaking down the python code
  • Vulnerability Management
    • Nessus
      • Introduction
      • Nessus Essentials
      • Scans
      • Authenticated Scans
      • Results
      • Running custom scans
  • Cloud
    • AWS
      • AWS CDK: Deploy and using amazon SQS Que from Repo
        • Node modules and Bootstrapping troubleshooting
        • Sending and Receiving information from the stack
        • Destroying the stack and cleaning up
      • Using Different AWS Services with Splunk
        • AWS Config
          • How Does Config work?
          • How to enable Config
          • Settings
          • Aggregation
          • Creating Config Resource
          • Creating Aggregator
          • Adding Rules
        • CloudTrail
          • What is CloudTrail?
          • Features of CloudTrail
          • Benefits of CloudTrail
          • CloudTrail Event History
          • Securing CloudTrail
        • EventBridge
          • Configuring EventBridge and Event Patterns
          • EventBridge Targets
        • CloudWatch
          • The CloudWatch Dashboard
            • Virtual Machine
          • CloudWatch Alarms and Metric Filters
            • Searching logs using metric filters
            • CloudWatch Alarms
          • CloudWatch CIS Alarms
            • SNS
        • Configuring VPC Flow Logs
          • An introduction to VPC flow logs
        • Automating Incident Response with EventBridge
          • Creating Lambda functions
        • CloudTrail SIEM Integration (Splunk)
          • AWS architecture for integrating with Splunk
      • AWS DevOps EBS Volumes
        • CloudWatch
        • EBS Volume
        • Lambda
      • EKS Creating a deployment with AWS in the command Line
        • Setting up AWS Cloud9
        • Creating a Cluster
        • Creating Deployment
      • How to CloudShell SSH in to ec2 Instances
    • Azure
      • Worker CTF (Azure DevOps)
        • Enumeration
        • Using SVN
        • Exploring the Domain
        • Cracking Azure DevOps console
      • Software development environments and Azure DevOps pipeline abuse
        • Accessing Azure Devops
        • Exploring Project Pages
  • Splunk
    • Splunk SIEM Integration
      • AWS architecture for integrating with Splunk
    • Splunk Threat Hunting Ep.6 Credential Access
  • DevOps
    • Using AWS, Docker, Jenkins and SonarQube to improve code quality
      • Updating the Cloud Instance and Getting Docker
      • Installing SonarQube
      • Creating Jenkins Server
      • Manaing SonarQube and Jenkins
    • Creating a Codebuild project and getting the output with CloudWatch Logs
      • IAM
      • CodeBuild
  • CTF's
    • THM Wonderland
      • Nmap and Gobuster
      • Entering Wonderland
      • Privilege Escalation
    • Healthcare OpenEMR system -THM Plotted EMR
      • Recon with Nmap
      • Exploring the ports found
      • Gobuster
      • Searchsploit Open emr
    • Steam Cloud CTF Exploiting Kubernetes
      • SteamCloud Privilege Escalation
    • THM Flatline CTF
      • Recon with Nmap
      • Searchsploit for freeswitch
      • Using the exploit
      • Escalating my privileges
      • Gaining access inside the Windows RDP
    • Biteme CTF
      • Recon
      • Looking into the PHP code and decoding hexadecimal
      • Python script and Bash script
      • Bruteforcing MFA Code
      • Trying to gain access via SSH
      • Inside SSH
      • Fail2ban Privilege Escalation
    • Devoops CTF
      • Enumeration
      • Exploiting Web Page
      • Creating Python exploit
    • GoBox CTF
      • Enumeration
      • Using Burpsuite and creating Reverse shell
    • Explore: Android Box
      • Enumeration
      • Initial foothold
      • Privilege escalation
Powered by GitBook
On this page
  1. Offensive Security
  2. Red team recon using OSINT

Built-in tools

PreviousTaxonomy of ReconnaissanceNextAdvanced Searching

Last updated 2 years ago

"Whois" tool -

whois tool, let's look at WHOIS. WHOIS is a request and response protocol that follows the RFC 3912 specification. A WHOIS server listens on TCP port 43 for incoming requests. The domain registrar is responsible for maintaining the WHOIS records for the domain names it is leasing. whois will query the WHOIS server to provide all saved records. In the following example, we can see whois provides us with:

  1. Registrar WHOIS server

  2. Registrar URL

  3. Record creation date

  4. Record update date

  5. Registrant contact info and address (unless withheld for privacy)

  6. Admin contact info and address (unless withheld for privacy)

  7. Tech contact info and address (unless withheld for privacy)

As we can see above, it is possible to gain a lot of valuable information with only a domain name. After a whois lookup, we might get lucky and find names, email addresses, postal addresses, and phone numbers, in addition to other technical information. At the end of the whois query, we find the authoritative name servers for the domain in question.

DNS queries can be executed with many different tools found on our systems, especially Unix-like systems. One common tool found on Unix-like systems, Windows, and macOS is nslookup. In the following query, we can see how nslookup uses the default DNS server to get the A and AAAA records related to our domain.

The final tool that ships with Unix-like systems is traceroute, or on MS Windows systems, tracert. As the name indicates, it traces the route taken by the packets from our system to the target host. The console output below shows that traceroute provided us with the routers (hops) connecting us to the target system. It's worth stressing that some routers don’t respond to the packets sent by traceroute, and as a result, we don’t see their IP addresses; a * is used to indicate such a case.