Assumed Breach Penetration Testing

If an attacker is already inside your environment, would you know? Packetlabs Assumed Breach Penetration Testing starts from the perspective that perimeter defenses have failed then evaluates how far a real adversary can move, escalate privileges, and access critical systems before being stopped.

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Test What Happens After Initial Access

Traditional testing focuses on keeping attackers out. Assumed breach testing focuses on what happens after they're in. We simulate compromised credentials or footholds and assess lateral movement, privilege escalation, Active Directory abuse, cloud pivoting, and access to sensitive data. This approach validates detection, response, and containment controls not just prevention.

Learn About Red Teaming

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What We Test

Assumed breach engagements are built around real attacker objectives and how they move once initial access is achieved.

Lateral Movement

Identify how attackers traverse internal systems using misconfigurations, trust relationships, and exposed services.

Privilege Escalation

Test whether standard user access can be elevated to domain admin, cloud admin, or other high-impact roles.

Read your intro to ABPT

Sensitive Data Access

Determine whether regulated data, intellectual property, or backups are reachable post-compromise.

Learn about the cost of detection delays

Hybrid Environment Pivoting

Assess movement between on-prem infrastructure, cloud platforms, and SaaS environments.

Learn more about hybrid environments

Detection & Response Gaps

Evaluate how quickly security teams detect and respond to suspicious internal behavior.

Learn more about incident response planning

Credential & Token Abuse

Test the resilience of identity systems against pass-the-hash, Kerberos abuse, token replay, and other techniques.

Learn more about token abuse and threat modelling

Assumed Breach Penetration Testing FAQs

Understand how Assumed Breach Penetration Testing works and how it differs from other offensive security services.

What is Assumed Breach Penetration Testing?

It is an engagement that begins with the assumption that an attacker has already gained initial access. The focus shifts to internal movement, escalation, and impact.

How is this different from infrastructure testing?

Does this replace red teaming?

Will this disrupt operations?

Who should consider this service?

Assumed Breach Testing vs. Infrastructure Penetration Testing

Packetlabs	Typical Competitors
Practitioner-led, real-world attack simulation	Outdated checklists
Manual testing focused on exploitable risk	Heavy reliance on automated scanners
Vendor-neutral and fully independent	Often tied to products or platforms
Clear, prioritized findings tied to business impact	High-volume findings with limited context
Deep coverage across apps, APIs, cloud, and networks	Narrow or surface-level coverage
Actionable remediation guidance included	Minimal or optional follow-up
Built for long-term security maturity	One-time assessments

Assumed Breach Penetration Testing: Key Outcomes

Assume Compromise

Assumed Breach testing starts from the position that an attacker is already inside your environment. Instead of focusing on perimeter defenses, we evaluate what happens next: how far an adversary can move, what they can access, and how much damage they can cause.

Lateral Movement & Privilege Escalation

We simulate post-compromise activity, testing for weak internal segmentation, excessive permissions, and misconfigured identity controls. Our goal is to determine whether an initial foothold can turn into domain-wide access or sensitive data exposure.

Detection & Response Gaps

Beyond exploitation, we assess how well your security team can detect and respond to suspicious activity. We identify blind spots in logging, alerting, and monitoring that could allow an attacker to operate undetected.

Actionable Containment Improvements

You receive clear insight into how an internal breach would unfold, along with prioritized guidance to limit blast radius, harden access controls, and strengthen detection capabilities. The result is improved resilience when it matters most.

What People Say About Us

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Your Introduction to Assumed Breach Penetration Testing

Learn about the primary tools, techniques, methodologies, and key outcomes surrounding Assumed Breach Penetration Testing (and when to know your organization is ready to invest.)

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The Cost of Detection Delays: Lessons from Assumed Breach Simulations

One of the top lessons from assumed breach simulations is that the cost of detection delays surpasses just the financial. Learn more about how CISOs can leverage assumed breach methodologies.

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Layered Cybersecurity and Assumed Breach-Based Pentests

When it comes to protecting an organization’s assets, the best solution is taking a layered security or defense approach.

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Assumed Breach Penetration Testing

Test What Happens After Initial Access

What We Test

Lateral Movement

Privilege Escalation

Sensitive Data Access

Hybrid Environment Pivoting

Detection & Response Gaps

Credential & Token Abuse

Assumed Breach Penetration Testing FAQs

What is Assumed Breach Penetration Testing?

How is this different from infrastructure testing?

Does this replace red teaming?

Will this disrupt operations?

Who should consider this service?

Assumed Breach Testing vs. Infrastructure Penetration Testing

Assumed Breach Penetration Testing: Key Outcomes

Assume Compromise

Lateral Movement & Privilege Escalation

Detection & Response Gaps

Actionable Containment Improvements

What People Say About Us

Related Posts

Your Introduction to Assumed Breach Penetration Testing

The Cost of Detection Delays: Lessons from Assumed Breach Simulations

Layered Cybersecurity and Assumed Breach-Based Pentests

Ready for More Than a VA Scan?