Post-Breach Remediation

We close the gaps the attacker used and rebuild identity, networks, and logging so the same attack fails next time.
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Definition

What is post-breach remediation?

Post-breach remediation is the work that follows incident response: closing every gap the attacker used, rebuilding the identity and network controls they abused, and proving the environment holds before the business treats the incident as closed. BD Emerson takes the root cause from the forensic report, ours or another firm's, turns each finding into a dated fix with an owner, and makes the changes with your team in Active Directory, Entra ID, the network, and your detection stack.

Incident response ends when the attacker is contained and systems are running again. The access path often survives that moment: the reused service account, the flat network, the unmonitored server, the backup that shared credentials with production. An attacker who kept a foothold, or another group that bought the same access, can return through the same door, so remediation starts with the paths the evidence shows were used.

Clients reach us in three ways: after we ran the response, through counsel or an insurer after another firm ran it, or months later when an audit, a renewal, or a board review asks what changed. Each engagement starts the same way, with the evidence of how the attacker got in and what they touched.

Services

What our post-breach remediation services include

Root cause closure
Identity rebuild
Network segmentation
Detection and logging
Backup redesign
Validation and reporting

Root cause closure

We turn each finding in the forensic report into a fix with an owner, a date, and a test that proves it worked. The first items close the exact access path the attacker used, such as an exposed remote access service, a missing MFA policy, or a vulnerable edge device.

Identity rebuild

We reset privileged credentials in the right order, reset the KRBTGT account twice, and remove the persistence attackers leave in Active Directory and Entra ID: rogue accounts, delegations, group policy changes, and OAuth app grants. Then we put tiered administration and privileged access controls in place.

Network segmentation

We break up the flat network the attacker moved across, restrict remote desktop, SMB, and management protocols between segments, and put egress controls on servers that have no reason to reach the internet. The first changes block the lateral moves the attacker made.

Detection and logging

We close the gaps that let the attack run unseen: endpoint detection on every server and workstation, central log collection with retention long enough to investigate, and detection rules mapped to the MITRE ATT&CK techniques in your incident, so the same behavior raises an alert next time.

Backup redesign

We separate backup administration from the production domain, add immutable or offline copies, and test restores of the systems the business needs first. The recovery order, the restore times, and the people who run them are written down and exercised.

Validation and reporting

We test the fixes with a targeted penetration test and a compromise assessment, then report each root-cause item with its fix, its date, and the test result. Leadership, the board, auditors, and your insurer get the same evidence, in the depth each one needs.

Our approach

Read the evidence, close the door, rebuild, prove it

01

Read the evidence

We start from the forensic findings: the initial access, the accounts used, the systems touched, and the controls that failed. If the investigation left questions open, we name them before any fix is planned.

02

Close the access path

The first changes close the specific path the attacker used and remove any persistence that survived containment, before the broader architecture work begins.

03

Rebuild the controls

We re-architect identity, segmentation, logging, and backups in an order set by risk, with your engineers making the changes beside ours so the knowledge stays in your team.

04

Prove it holds

A targeted penetration test and a compromise assessment check the fixes. The final report maps every root-cause finding to the change that closed it and the test that confirmed it.

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Back in operation after a breach?

Bring the forensic report, or what you know so far. In one working session we will map the gaps it shows, the fixes that close them, and the order to make them in.

Our Advantage

Why BD Emerson for post-breach remediation

One firm from forensics to fixes

The practitioners who investigate incidents also run penetration tests, security monitoring, and compliance programs, so the root cause becomes tested fixes without a handoff to a firm learning your environment from a report.

Engineers who make the changes

We do the work in Active Directory, Entra ID, the firewalls, and the EDR console with your team, then document it. You get changed systems and a team that knows why each change was made.

Evidence for every audience

Each fix ties to a root-cause finding, an owner, a date, and a validation result, so one register answers your board, your auditors, your insurer, and a future acquirer's diligence team.

Reviews

What our customers say

Great consulting firms for scaling security, compliance, and appsec.

Outstanding partner in Technical and Cyber Due Diligence

Appsec maturity and application hardening.

BD Emerson helped us simplfiy our compliance management.

BD Emerson did such a phenomenal job. What started as privacy support quickly became a full partnership across compliance, engineering, and even business operations. They’re embedded with our team. They understand our product. They move fast. They’re simply invaluable.

Adam Ben Jacobs

CTO @ OneStep GPS

Great consulting firms for scaling security, compliance, and appsec.

Outstanding partner in Technical and Cyber Due Diligence

Appsec maturity and application hardening.

BD Emerson helped us simplfiy our compliance management.

BD Emerson did such a phenomenal job. What started as privacy support quickly became a full partnership across compliance, engineering, and even business operations. They’re embedded with our team. They understand our product. They move fast. They’re simply invaluable.

Adam Ben Jacobs

CTO @ OneStep GPS

We had a hard time finding the right company to partner with in support of our compliance journey. Some vendors sell the idea that they do the work, but then you end up doing everything. The ambiguity is what killed our last project. BD Emerson’s team has such great technical knowledge and understands the standard so well that they made us comfortable with moving fast. This has led to us closing major enterprise customers that were previously out of reach because of security and compliance.

Tom Watkins

CEO @ AMI AssetTrack

Lead an enterprise initiative to overhaul the organization's technology stack from ecommerce, corporate tech, and corporate security.

Supported ISO 42001 exercise and served as internal auditor.

Rubrik's privacy and compliance team began with the backbone of BD Emerson. BD Emerson supported building out the privacy program, GRC (ISO 27001, SOC 2, CMMC, FedRAMP), and the appsec function.

We needed a partner who could move quickly, without sacrificing precision. BD Emerson brought the expertise, structure, and speed we were looking for. Their team became an extension of ours, embedding themselves across the organization, guiding us step by step, and giving us confidence in areas we hadn’t tackled before. The internal audit they conducted was so detailed that even the external auditors called it out. Achieving ISO 27001 with zero nonconformities says everything you need to know about the quality of the partnership.

Walid Souilem

CTO @ FGI Worldwide

We had a hard time finding the right company to partner with in support of our compliance journey. Some vendors sell the idea that they do the work, but then you end up doing everything. The ambiguity is what killed our last project. BD Emerson’s team has such great technical knowledge and understands the standard so well that they made us comfortable with moving fast. This has led to us closing major enterprise customers that were previously out of reach because of security and compliance.

Tom Watkins

CEO @ AMI AssetTrack

Lead an enterprise initiative to overhaul the organization's technology stack from ecommerce, corporate tech, and corporate security.

Supported ISO 42001 exercise and served as internal auditor.

Rubrik's privacy and compliance team began with the backbone of BD Emerson. BD Emerson supported building out the privacy program, GRC (ISO 27001, SOC 2, CMMC, FedRAMP), and the appsec function.

We needed a partner who could move quickly, without sacrificing precision. BD Emerson brought the expertise, structure, and speed we were looking for. Their team became an extension of ours, embedding themselves across the organization, guiding us step by step, and giving us confidence in areas we hadn’t tackled before. The internal audit they conducted was so detailed that even the external auditors called it out. Achieving ISO 27001 with zero nonconformities says everything you need to know about the quality of the partnership.

Walid Souilem

CTO @ FGI Worldwide

BD Emerson didn’t just help us meet our compliance goals; they integrated security and privacy into the core of our operations. I highly recommend BD Emerson to anyone seeking SOC 2 or GDPR compliance, or simply looking to enhance their security team and boost customer trust in their product and services. Their dedication and expertise have been invaluable to our success.

Padraig Reilly

CEO, Boxcore

BD Emerson understood our business requirements and worked side-by-side with us. The policies and controls we developed together not only meet compliance standards but improve how we operate day to day.

Matt Meierdierks

IT Manager, Lincoln Industries

From day one, BD Emerson brought urgency, clarity, and a sharp understanding of what truly matters to our business — earning and keeping customer trust. They went beyond helping us meet compliance requirements; they helped build a foundation for secure, scalable growth. That kind of partnership is rare.

Jason Marker

CEO @ LifeLenz

BD Emerson didn’t just help us pass an audit—they helped us build a sustainable culture of security.

Alexey Indeev

CTO Spare

BD Emerson was essential in helping our company navigate the daunting process of leveling up our security infrastructure. BD Emerson’s impressive expertise and confidence throughout the process helped our team exceed HIPAA and SOC 2 Type 1 standards quickly, distilling what can be an overwhelming process into a streamlined, organized effort. From day one they began adding value and getting us on course. With their help we delivered on a massive security overhaul with both extreme efficiency and thorough attention to details. Because of BD Emerson’s support, we’ve increased our clients’ trust in Titan Intake and the life-changing work it accomplishes for those seeking specialist referrals.

Patrick Bruce

CEO, Titan Intake

BD Emerson didn’t just help us meet our compliance goals; they integrated security and privacy into the core of our operations. I highly recommend BD Emerson to anyone seeking SOC 2 or GDPR compliance, or simply looking to enhance their security team and boost customer trust in their product and services. Their dedication and expertise have been invaluable to our success.

Padraig Reilly

CEO, Boxcore

BD Emerson understood our business requirements and worked side-by-side with us. The policies and controls we developed together not only meet compliance standards but improve how we operate day to day.

Matt Meierdierks

IT Manager, Lincoln Industries

From day one, BD Emerson brought urgency, clarity, and a sharp understanding of what truly matters to our business — earning and keeping customer trust. They went beyond helping us meet compliance requirements; they helped build a foundation for secure, scalable growth. That kind of partnership is rare.

Jason Marker

CEO @ LifeLenz

BD Emerson didn’t just help us pass an audit—they helped us build a sustainable culture of security.

Alexey Indeev

CTO Spare

BD Emerson was essential in helping our company navigate the daunting process of leveling up our security infrastructure. BD Emerson’s impressive expertise and confidence throughout the process helped our team exceed HIPAA and SOC 2 Type 1 standards quickly, distilling what can be an overwhelming process into a streamlined, organized effort. From day one they began adding value and getting us on course. With their help we delivered on a massive security overhaul with both extreme efficiency and thorough attention to details. Because of BD Emerson’s support, we’ve increased our clients’ trust in Titan Intake and the life-changing work it accomplishes for those seeking specialist referrals.

Patrick Bruce

CEO, Titan Intake

Certificates

Our accreditations

Our practitioners hold security, privacy, cloud, and AI governance certifications, and the people who earned them do the work on your engagement.
FAQ

Frequently asked questions

What is the difference between incident response and post-breach remediation?

How long does post-breach remediation take?

Do we need to rebuild Active Directory after a breach?

How do we know the attacker is gone?

Can remediation work stay under attorney-client privilege?

What drives the cost of post-breach remediation?

What should we show our board, insurer, or regulators after a breach?

Do you test the fixes once they are in place?

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