Trusted Accounts Become the Greatest Cybersecurity Risk
A professional services organization with a mature cybersecurity program learned that trusted executive and vendor accounts can create significant enterprise risk.
Market Sector
Professional Services Organization
A well-established professional services organization with a mature cybersecurity program engaged Cybermode to perform a comprehensive assessment of its enterprise security posture. The engagement evaluated both technical security controls and organizational risk management practices to determine how a motivated attacker could compromise critical business systems.
Cybermode Services Performed
- Comprehensive Penetration Test
- Comprehensive Cloud Penetration Test
- Enterprise Risk Assessment
- Enterprise Incident Response Assessment
- OSINT Assessment
- Dark Web Breach Data Assessment
Engagement Scope
Cybermode conducted a multi-layered assessment of the client's enterprise environment using a combination of manual penetration testing, cloud security analysis, identity assessment, and executive risk analysis.
The engagement included:
- Internal and external penetration testing
- Active Directory security review
- Enterprise identity and privilege analysis
- Administrative credential audit
- Cloud security assessment
- Third-party access review
- Dark web breach data assessment
- Open-source intelligence (OSINT) analysis
- Incident response readiness review
- Enterprise cybersecurity governance assessment
- Enterprise risk assessment
Although the organization demonstrated a mature overall security posture with strong defensive technologies, modern endpoint protection, cloud adoption, and effective monitoring, the Enterprise Risk Assessment identified a critical governance concern that could significantly increase the impact of a successful compromise.
Cybermode discovered that numerous executive leadership accounts, including C-level executives and senior leadership, had been assigned Enterprise Administrator and Domain Administrator privileges directly to their day-to-day user accounts. These highly privileged identities dramatically expanded the potential impact of phishing attacks, credential theft, or account compromise.
Because professional services organizations often rely on link-based cloud documents shared through email, the phishing vector of attack presented a substantial risk in this area.
The assessment also identified excessive privileged access granted to a third-party managed IT services provider. Approximately ten vendor-managed accounts possessed Enterprise Administrator privileges despite the limited number of accounts that should require unrestricted administrative control. This level of access substantially increased supply-chain risk and expanded the organization's attack surface.
While no evidence of malicious activity was identified, the assessment demonstrated that a compromise of any one of these privileged identities could provide an attacker with immediate access to the organization's most sensitive systems.
Impact
Cybermode identified executive and vendor user accounts with extremely high levels of domain access - which was unneeded. These accounts were locked down and secured, dramatically limiting the risk to the organization.
Lessons Learned
Organizations often invest heavily in firewalls, endpoint protection, cloud security, and vulnerability management while overlooking one of the most important attack surfaces: privileged identities.
This deficiency was revealed in the risk assessment - not the penetration test.
Modern attackers frequently target executives and trusted vendors because compromising a single highly privileged account can bypass many traditional security controls.
Strong cybersecurity is no longer defined solely by preventing intrusion. It also requires limiting what an attacker can accomplish after gaining an initial foothold.
By enforcing least privilege, reducing unnecessary administrative access, and governing third-party identities with the same rigor as internal accounts, organizations can dramatically reduce enterprise risk while strengthening resilience against ransomware, identity-based attacks, and supply-chain compromise.
