It is one of the most searched cybersecurity questions. And the answer most organizations act on is incorrect.
Most organizations, when they think about how cyberattacks start, picture external forces breaking through their defenses:
- Sophisticated hackers probing firewalls
- Zero-day exploits targeting unpatched systems
- Advanced persistent threats infiltrating networks through technical vulnerabilities
These attacks exist. But they are not how most breaches begin.
Most cyberattacks start with a person.
Specifically, with a person doing something ordinary:
- Opening an email
- Clicking a link
- Entering credentials into a page that looks exactly like the real thing
Matt Rosenthal, CEO of Mindcore Technologies, sees this every day:
“Almost every single breach that we deal with, and we deal with them every single day, somebody either clicked on an email that had a link in it, or they actually clicked on it, opened it and entered some information. As soon as you do that, you’re giving people a key to the front door.”
Organizations reducing real-world breach exposure should evaluate layered cybersecurity services, identity protection strategies, and employee-focused security controls before attackers exploit predictable gaps.
The Most Common Starting Points for Cyberattacks
Phishing Emails
The majority of breaches begin with a phishing email.
An employee receives a message appearing legitimate, clicks a link, and enters credentials on a fake login page.
The attacker now has authenticated access to that account and everything connected to it.
Phishing works because it does not try to defeat technical controls. It convinces a person to voluntarily provide access.
No firewall stops a user from willingly entering their own password.
Organizations reducing phishing exposure should implement security awareness training and simulated phishing programs.
Stolen or Reused Credentials
Billions of username and password combinations from previous data breaches are available on dark web marketplaces.
Attackers use automated credential stuffing tools to test these credentials against corporate systems and cloud platforms.
If employees reuse passwords between personal and work accounts, attackers can compromise business systems without ever sending a phishing email.
Businesses improving authentication security should implement multi-factor authentication and strong password management policies.
Compromised Third-Party Vendors
Many breaches do not start inside the target organization at all.
They begin through vendors, suppliers, or platform providers already connected to the organization.
The Canvas cyberattack demonstrated this clearly. The breach did not originate inside individual universities. It began at the platform level and cascaded across institutions relying on the service.
Organizations dependent on external platforms should evaluate IT risk assessments and third-party risk management processes.
Unpatched Vulnerabilities
Known software vulnerabilities become public quickly.
Attackers scan the internet continuously for systems still running vulnerable versions.
Organizations failing to patch promptly expose themselves to attacks exploiting weaknesses already widely documented.
Weak or Default Credentials
Routers, cameras, servers, and administrative interfaces are frequently deployed with default or weak credentials never updated after installation.
Attackers scan for these systematically.
A device with default credentials is effectively an unlocked door.
Organizations reducing exploitable attack surfaces should also review network security monitoring and managed IT services.
Why the Wrong Answer Leads to the Wrong Strategy
When organizations assume cyberattacks primarily begin through advanced technical exploits, they invest accordingly:
- More firewall capacity
- More endpoint tools
- More network monitoring platforms
These are not bad investments.
But they do not address the primary attack vector.
If most breaches start with phishing or stolen credentials, the most impactful investments are:
- MFA enforcement
- Security awareness training
- Credential hygiene
- Phishing simulations
Organizations skipping these fundamentals while focusing only on perimeter defenses are building sophisticated security around an unlocked front door.
Businesses modernizing security architecture should also evaluate Zero Trust security models and secure workspace environments.
What Happens After the Initial Entry Point
Understanding how attacks begin matters. Understanding what happens next determines how severe the breach becomes.
Credential Access
Once attackers obtain valid credentials, they inherit the same access as the compromised user:
- Cloud storage
- Shared drives
- Connected applications
Internal Reconnaissance
Attackers explore the environment searching for:
- Sensitive data
- Additional credentials
- Administrative privileges
- High-value systems
Lateral Movement
Using the initial foothold, attackers compromise additional accounts and systems.
Environments lacking segmentation allow one compromised user account to expand into organization-wide access.
Privilege Escalation
Attackers seek administrative or domain administrator access.
Elevated privileges allow them to:
- Install malware
- Modify systems
- Create persistence mechanisms
- Access nearly all organizational resources
Data Exfiltration or Ransomware
At this stage, attackers either steal data, deploy ransomware, or both.
What began as one clicked link becomes a full organizational incident.
The time between initial compromise and severe damage may be hours. In slower attacks, it may be weeks or months before detection.
Organizations seeking to contain lateral movement should evaluate ransomware protection, incident response services, and managed security services.
The Controls That Stop Attacks at the Starting Point
Multi-Factor Authentication
MFA is the single most effective control against credential-based attacks.
Even when attackers successfully steal passwords through phishing, MFA blocks account access.
Rosenthal is clear: “You’ve got to turn that on for every single account that you have.”
Security Awareness Training
Employees trained to recognize phishing and suspicious behavior make better decisions under pressure.
Regular training combined with simulated phishing exercises creates measurable behavioral improvement over time.
Password Management
Unique passwords for every account eliminate credential stuffing risk.
Password managers make maintaining strong, unique credentials practical at scale.
Email Filtering
Email filtering reduces phishing exposure before suspicious messages ever reach employee inboxes.
No filter is perfect, but reducing exposure lowers risk significantly.
Vendor Risk Management
Third-party access should be documented, evaluated, and controlled.
Vendors with access to sensitive systems should meet defined security standards before access is granted.
Patch Management
Prompt patching closes known vulnerabilities attackers actively scan for.
A disciplined patch management process significantly reduces exploitable attack surface.
Organizations building mature security programs should also evaluate co-managed IT services and virtual CISO consulting.
Actionable Steps
- Enable MFA on every account immediately – Close the most common credential-based attack path
- Run a simulated phishing campaign – Measure employee response before attackers do
- Require unique passwords across all accounts – Deploy password managers organization-wide
- Audit third-party access – Know who can access your environment
- Review patch management processes – Ensure critical vulnerabilities are patched within defined timelines
- Establish phishing reporting procedures – Make reporting suspicious emails easy and safe
Organizations improving operational resilience should also review penetration testing services and business continuity planning.
FAQ: How Cyberattacks Start
What is the most common way a cyberattack begins?
Phishing is the most common starting point for cyberattacks. Employees receive deceptive emails, click malicious links, and unknowingly provide credentials attackers use to access systems.
Can a company be breached even with a strong firewall?
Yes. Firewalls protect against unauthorized network access but do not stop users from voluntarily entering credentials into phishing pages or attackers using valid stolen credentials.
How long does it take attackers to cause damage after initial access?
Some attackers escalate privileges and deploy ransomware within hours. Others move slowly for weeks or months to avoid detection while expanding access throughout the environment.
What is credential stuffing?
Credential stuffing is an automated attack where attackers use leaked username and password combinations from previous breaches to test access against other platforms and systems.
The Bottom Line
Cyberattacks do not start the way most organizations imagine.
They start with a person making a decision under pressure involving an email, a link, and a login page looking completely legitimate.
The organizations understanding this reality build security programs around the human layer, not just technical perimeter defenses.
MFA, phishing awareness, credential hygiene, and simulated attacks are not soft security measures. They address the actual starting point of most real-world breaches.
Mindcore Technologies helps organizations build security programs grounded in how attacks actually happen, not how organizations assume they happen.
If your security investments focus primarily on perimeter defenses without addressing the human layer, you are solving the wrong problem.
Schedule a consultation with Mindcore to evaluate your organization’s phishing exposure, authentication controls, and human-layer security posture before attackers exploit predictable gaps.
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