- Use VPNs or Tor to conduct your searching. Tor may be blocked by some services.
- Some searches may reveal personal information. Be empathetic and responsible with this, even though it is "public" information.
These custom and more manual approaches work excellently in combination with automated tools such as recon-ng or the commercial Maltego. Working with both these tricks and the automated tools, feeding information learned from one back to the other, is a powerful way to unearth large amounts of information about an organization.
Much of the tools and further guidance is well covered in the references for the Reconnaissance method, a small selection of starting points is mapped out below.
Take care, however, to not waste time on this; using image information tools on every photo on an organization's website, or researching every linked social media account may not provide further valuable information - step back and judge the value of digging deeper - are you finding adversaries? Are you finding information that the organization may not want online? Are there other methods which might be more appropriate to apply?
Part of modern life is having a presence on-line. For many organizations, their online work is key to their success. It is overall important to understand how disparate pieces of data can be combined by a dedicated adversary to build a deep understanding of the organization and its employees, which is useful in "social engineering" attacks such as "spear-phishing" -- sending professional, seemingly relevant emails with malicious attachments.
Monitoring sites (like pastebin with tools like pasteLert) for information about your organization can help detect breaches, especially by cyber-criminals. However, it is generally more valuable to expend limited resources on constant updates of the web server, CMS system (e.g. Joomla), and plugins.
Running images through tools to remove "EXIF" data is useful, particularly when the images come from devices (such as smartphones) with GPS built-in.
Consider the risk of doxing, which affects particularly organizations with a focus on topics that carry a social stigma - OSINT-based attacks can affect for example single members of women's and LGBTQ rights organizations. In these cases the research described in this exercise should also be carried out on the most visible persons of the organization. This activity can be combined with the Self-Doxing exercise to identify and mitigate vulnerabilities without intruding into team members' privacy.