Your company website is designed to build trust. It introduces your leadership team, highlights your services, showcases customer success stories, and makes it easier for prospects to contact you.
Unfortunately, it can also become a valuable source of intelligence for cybercriminals.
Attackers routinely use publicly available information to research organizations before launching phishing campaigns, business email compromise attacks, and other forms of social engineering. This practice, known as open-source intelligence (OSINT), allows attackers to create highly personalized attacks that appear legitimate because they are based on real information your business has chosen to share.
For organizations using Microsoft 365, understanding how public information supports modern cyberattacks is an important part of reducing risk. Protecting your business is not about hiding your online presence. It is about understanding what information is publicly available and how it could be used against you.
Open-source intelligence, or OSINT, is the process of collecting and analyzing publicly available information.
Security professionals use OSINT to assess organizational risk and identify exposed assets. Cybercriminals use many of the same techniques to prepare targeted attacks.
Common sources of business intelligence include:
Individually, these pieces of information may seem harmless. Together, they can provide attackers with a detailed understanding of how your organization operates.
Your website often answers the exact questions an attacker wants to ask before launching a phishing campaign.
Executive biographies reveal names, job titles, reporting structures, and areas of responsibility.
An attacker may impersonate a CEO, CFO, or department leader because those names are publicly associated with the business.
Publishing direct email addresses or employee directories can make it easier for attackers to identify potential phishing targets.
Combined with publicly available email formats, attackers can often determine how your organization's email addresses are structured.
Job postings frequently reference technologies such as Microsoft 365, Microsoft Entra ID, SharePoint, Azure, Salesforce, or other business applications.
This information helps attackers tailor phishing campaigns to the software your employees actually use.
Case studies, partner announcements, and customer success stories often identify vendors, clients, and strategic partners.
Attackers may reference these relationships in fraudulent emails to make their requests appear more credible.
Consider a construction company that publishes the following information on its website:
An attacker can combine this information with publicly available social media posts and business records to build a convincing phishing campaign.
For example, the attacker may send an email that appears to come from a project executive requesting an updated invoice from a known supplier. The message references an actual project listed on the company's website, uses the names of real employees, and reflects the organization's normal communication style.
Nothing in the email may appear unusual because the information is accurate.
The success of the attack depends less on technical sophistication and more on the attacker's understanding of the business.
Artificial intelligence has accelerated the research phase of social engineering.
AI can quickly organize publicly available information from multiple sources and generate realistic emails that match an organization's tone and writing style.
Instead of sending generic phishing messages, attackers can create communications that reference:
The result is a phishing campaign that feels relevant and trustworthy.
Microsoft 365 is often the primary collaboration platform for small and mid-market businesses.
If an attacker successfully compromises a Microsoft 365 identity through a targeted phishing attack, they may gain access to:
This is why protecting identities is just as important as protecting devices.
Organizations should implement security controls such as multifactor authentication, Microsoft Entra Conditional Access, and continuous identity monitoring to reduce the impact of credential theft.
Organizations should not remove valuable content from their websites simply because attackers can see it.
Instead, they should evaluate whether the information being shared creates unnecessary risk.
Consider whether biographies contain information that could help attackers impersonate leadership or identify approval workflows.
Provide clear methods for contacting the business without exposing more employee information than necessary.
Review technology references to determine whether they reveal unnecessary details about your internal environment.
Ensure downloadable documents do not unintentionally expose internal usernames, metadata, network details, or confidential information.
Regularly review your organization's public information from the perspective of an external observer.
Understanding what attackers can see is an important part of reducing organizational risk.
Reducing publicly available information is only one layer of defense.
Organizations should also strengthen technical controls, including:
These controls help prevent a successful phishing attempt from becoming a larger security incident.
Employees often think of cybersecurity as protecting passwords and devices.
They should also understand how publicly available business information can be used in social engineering attacks.
Training should encourage employees to:
Awareness programs are most effective when they reflect real-world attack techniques rather than generic phishing examples.
A strong online presence is essential for modern businesses.
The goal is not to eliminate public information but to understand how attackers may use it to increase the credibility of phishing and social engineering attacks.
By combining thoughtful information governance with strong identity protection, layered security controls, and employee awareness, organizations can reduce the likelihood that publicly available information becomes the starting point for a successful cyberattack.
Open-source intelligence (OSINT) is the process of collecting and analyzing publicly available information from sources such as company websites, social media, news articles, and public records. Security professionals use OSINT for risk assessments, while attackers may use it to plan targeted cyberattacks.
Attackers analyze company websites to identify executives, employees, technologies, business relationships, projects, and contact information. They use this intelligence to create convincing phishing and social engineering attacks.
Public information can help attackers impersonate employees, reference real business activities, and craft messages that appear legitimate. The more context attackers have, the more convincing their attacks can become.
Not necessarily. Organizations should balance marketing and business needs with cybersecurity considerations by reviewing what information is publicly available and limiting details that create unnecessary risk.
AI helps attackers quickly analyze public information and generate personalized phishing emails that match an organization's language, structure, and business context.
Organizations should implement multifactor authentication, Microsoft Entra Conditional Access, advanced email protection, regular permission reviews, and employee security awareness training to reduce the impact of targeted phishing attacks.
Review executive biographies, evaluate technology references in job postings, limit unnecessary contact information, monitor publicly available documents, and regularly assess your organization's digital footprint from an attacker's perspective.
Yes. Security teams use OSINT to identify exposed information, evaluate organizational risk, discover forgotten internet-facing assets, and strengthen cybersecurity before attackers can exploit publicly available data.
Microsoft: Protect Against Phishing Attacks
Cybersecurity and Infrastructure Security Agency: Avoid Social Engineering and Phishing Attacks
National Institute of Standards and Technology: Digital Identity Guidelines