theHarvester

theHarvester is a tool that cen be used to collect information about multiple sources about a target. The tool gathers names, emails, IPs, subdomains, and URLs by using multiple public resources.

You may look at the help of the tool to check those public resources.

theHarvester -h

You can look at several options.

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* theHarvester 4.2.0                                              *
* Coded by Christian Martorella                                   *
* Edge-Security Research                                          *
* [e-mail]                                   *
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usage: theHarvester [-h] -d DOMAIN [-l LIMIT] [-S START] [-p] [-s] [--screenshot SCREENSHOT] [-v] [-e DNS_SERVER] [-r] [-n] [-c] [-f FILENAME] [-b SOURCE]

theHarvester is used to gather open source intelligence (OSINT) on a company or domain.

options:
-h, --help            show this help message and exit
-d DOMAIN, --domain DOMAIN
                        Company name or domain to search.
-l LIMIT, --limit LIMIT
                        Limit the number of search results, default=500.
-S START, --start START
                        Start with result number X, default=0.
-p, --proxies         Use proxies for requests, enter proxies in proxies.yaml.
-s, --shodan          Use Shodan to query discovered hosts.
--screenshot SCREENSHOT
                        Take screenshots of resolved domains specify output directory: --screenshot output_directory
-v, --virtual-host    Verify host name via DNS resolution and search for virtual hosts.
-e DNS_SERVER, --dns-server DNS_SERVER
                        DNS server to use for lookup.
-r, --take-over       Check for takeovers.
-n, --dns-lookup      Enable DNS server lookup, default False.
-c, --dns-brute       Perform a DNS brute force on the domain.
-f FILENAME, --filename FILENAME
                        Save the results to an XML and JSON file.
-b SOURCE, --source SOURCE
                        anubis, baidu, bevigil, binaryedge, bing, bingapi, bufferoverun, censys, certspotter, crtsh, dnsdumpster, duckduckgo, fullhunt, github-code,
                        hackertarget, hunter, intelx, omnisint, otx, pentesttools, projectdiscovery, qwant, rapiddns, rocketreach, securityTrails, sublist3r, threatcrowd,
                        threatminer, urlscan, virustotal, yahoo, zoomeye

As you can see, the list of sources of information include the following:

anubis, baidu, bevigil, binaryedge, bing, bingapi, bufferoverun, censys, certspotter, crtsh, dnsdumpster, duckduckgo, fullhunt, github-code, hackertarget, hunter, intelx, omnisint, otx, pentesttools, projectdiscovery, qwant, rapiddns, rocketreach, securityTrails, sublist3r, threatcrowd, threatminer, urlscan, virustotal, yahoo, zoomeye

So lets go and try to collect information from a target.

theHarvester -d your-target.com -l 500 -b all

And try to interpret the possible results obtained.