Additionally, we can use Google's advanced search options (https://support.google.com/websearch/answer/2466433) to look for information about our target domain without directly accessing it. For example, by using a search like site:site_to_look_into "target_domain", we can look for the presence of our target domain in pages where recently found vulnerabilities, leaked information or successful attacks have been published, some good places where we can look at are:

• openbugbounty.org: Open Bug Bounty is a site where independent security researchers report and disclose vulnerabilities (only Cross-Site Scripting and Cross-Site Request Forgery) on public facing websites. So this search in Google will return all mentions to "zonetransfer.me" made in openbugbounty.org.
• pastebin.com: Pastebin is, among other uses, a very popular way for hackers to anonymously exfiltrate and publish information obtained during an attack.
• zone-h.org: Zone-H is a site where malicious hackers go and brag about their achievements, mostly the defacement of sites.