Allows you to discover subdomains of a target domain and to determine the attack surface of a target organization. Find systems which are less protected and more vulnerable to attacks.
Discover Attack Surface
Find which systems are exposed to the Internet and constitute your organization's attack surface. Development, test, backup or less-known applications are usually an easy target for attackers and they can be the entry point of an attacker to your organization.
This is a great way to perform an independent asset inventory and to check if the 'official' list of systems exposed to the Internet corresponds with the reality. The results will allow you to update your internal documentation and decomission legacy systems or upgrade the old ones.
The results of Find Subdomains are obtained in real-time and no caching mechanism is used. This allows us to always have up-to date results. Furthermore, the DNS resolution of the subdomains is also performed in real-time and only the valid results are shown.
Finding subdomains is an important step in the information gathering phase of a penetration test. Subdomains are interesting because they point to various (less-known) applications and indicate different external network ranges used by the target company.
For instance, subdom1.company.com points to IP 188.8.131.52 and subdom2.company.com points to IP 184.108.40.206. Now you know two different IP ranges possibly owned by your target organization and you can extend the attack surface.
Furthermore, subdomains sometimes host 'non-public' applications (e.g. test, development, restricted) which are usually less secure than the public/official applications so they can be the primary attack targets.
Is the target domain name (ex. oracle.com, yahoo.com, etc) which will be searched for subdomains
Include IP information
This option instructs the tool to do whois queries in order to determine the network owners and country for each IP address
How it works
This tool uses multiple techniques to find subdomains such as:
DNS records (NS, MX, TXT, AXFR)
DNS enumeration based on a specially chosen wordlist
Public search engine queries
Word mutation techniques
Searching in SSL certificates
Parsing HTML links
Reverse DNS on target IP ranges
This tool costs 20 credits but you have 40 credits left.