Endpoint and EDR
Whether endpoint controls stop and detect attacker behavior, not only known file signatures.
Breach and Attack Simulation · FourCore ATTACK: Know which controls hold up under a real attack.
Breach and Attack Simulation safely runs real attacker techniques against your EDR, SIEM, email, web and network controls, and shows what each one blocked, detected or missed.
FourCore Analystjust now
“Would our EDR stop ransomware from deleting shadow copies?”
Blocked.
Safe replay on 6 servers. The EDR blocked the deletion on all 6 and the SIEM raised an alert.
- EDR6 blocked
- SIEMalert raised
What is Breach and Attack Simulation?
Breach and Attack Simulation (BAS) is an automated way to validate security controls. It safely emulates adversary techniques in your environment and records whether each control blocked, detected or missed them, so the team fixes real gaps instead of assumed ones.
Simulate
Real attacker techniques, run safely
A BAS test runs the behaviors an attacker would use, mapped to MITRE ATT&CK, on your own machines and through your own network, web and email controls. Nothing destructive runs, and each test cleans up after itself.
What is BAS, in plain languageRansomware precursor chain
The steps ransomware crews take before encryption, rebuilt as a safe chain.
Mapped to MITRE ATT&CK: 4 techniques
- Credentials read from LSASS memoryEndpoint
- Shadow copies deletedEndpoint
- Lateral movement over SMBNetwork
- Test data sent to an external hostNetwork
Measure
Blocked, detected or missed, for every control
Each step is matched to the alerts in your EDR and SIEM. A result tells you which control stopped the step, which only saw it, and which missed it, with the cause of every miss.
Ransomware precursor chain
- Detected
Credentials read from LSASS memory
EDR
- Blocked
Shadow copies deleted
EDR
- Missed
Lateral movement over SMB
SIEM
Logs collected, no correlation rule
- Blocked
Test data sent to an external host
Web proxy
Improve
Every gap becomes a fix and a retest
A miss is only useful if it gets closed. FourCore ATTACK writes the change and the detection rule for each gap, your team applies them, and the same test runs again to confirm the gap is gone.
Explore FourCore ATTACKFix plan
- Stop it
- Restrict SMB between workstations
- Detect it
- Lateral movement rule for your SIEM
- Validate it
- Same chain, same 6 servers
Retest Detected on 6 of 6
How Breach and Attack Simulation works.
The same loop runs for every new threat and after every change to your controls. FourCore Analyst AI agents do the work, and your team makes the calls.
FourCore Analyst
Builds, runs and reads
Your team
Makes the calls
Choose
A new threat, a campaign or an ATT&CK technique.
4 techniquesBuild
A safe chain from library actions.
Safe chain readyApprove
Your team sets where and when it runs.
Run approvedRun and measure
Every step matched to your alerts.
1 missedFix
A change and a rule for each gap.
1 change, 1 ruleApply
Your team applies the change.
Change appliedRetest
The same chain runs again.
6 of 6 detected
Agents
You
Choose
A new threat, a campaign or an ATT&CK technique.
4 techniquesBuild
A safe chain from library actions.
Safe chain readyApprove
Your team sets where and when it runs.
Run approvedRun and measure
Every step matched to your alerts.
1 missedFix
A change and a rule for each gap.
1 change, 1 ruleApply
Your team applies the change.
Change appliedRetest
The same chain runs again.
6 of 6 detected
What a BAS platform tests.
Start with the controls that stand between an attacker and your data, then let the results decide what changes.
SIEM and SOC detection
Whether the logs arrive, the correlation rules fire and the alert reaches the team.
Network and firewall
Segmentation, firewall and IDPS controls against lateral movement and command and control.
Email security
Whether the email gateway catches malicious attachments, links and delivery paths.
Web and application
Web proxy and WAF defenses against the techniques that target your applications.
DLP and exfiltration
Whether data protection controls notice and stop controlled exfiltration of test data.
Where teams use Breach and Attack Simulation.
- Detection engineering
- Check that new and existing detections fire against the behavior that matters, and tune the ones that don't.
- Ransomware readiness
- Test prevention, detection and response against the techniques ransomware crews use, before an incident does it for you.
- MITRE ATT&CK coverage
- See coverage by technique and control, in a framework the SOC and leadership already share.
- After every control change
- Retest after an EDR, SIEM, firewall or policy change, so a quiet regression shows up in your results first.
BAS, penetration testing and red teaming.
Each method answers a different question. Mature programs use them together, and BAS covers the time between engagements and after every change.
| Method | What it does | How often | What you get |
|---|---|---|---|
| Vulnerability scanning | Finds known weaknesses | Frequent | A list of vulnerabilities |
| Penetration testing | Manually exploits selected weaknesses | Periodic | Exploit findings and a report |
| Red teaming | Tests people, process and defenses | Periodic | Exercise outcomes |
| Breach and Attack Simulation | Validates security controls continuously | Continuous | Blocked, detected or missed, per control |
Read the detailed BAS vs penetration testing comparison, or the short BAS definition.
Questions
What is Breach and Attack Simulation?
Breach and Attack Simulation (BAS) is an automated security validation method that safely emulates adversary techniques against an organization's controls. It shows whether defenses blocked, detected or missed each behavior, giving security teams evidence to prioritize remediation.
What does a BAS platform test?
Controls such as EDR, SIEM detections, firewalls and IDPS, email security, web proxies, WAF and DLP. The exact scope depends on the platform, its deployment model, its integrations and the simulations it supports.
How is BAS different from penetration testing?
Penetration testing is a manual, point-in-time engagement focused on exploiting selected weaknesses. BAS is automated and repeatable, so teams can validate controls between pentest cycles and after every change to the environment.
Does BAS replace red teaming?
No. Red teams test people, process and defenses through human-led exercises, while BAS gives repeatable, automated validation of security controls. Mature programs use both.
What results does BAS produce?
For each step: the technique attempted, the control tested, whether the behavior was blocked, detected or missed, the evidence behind the result, and the fix or detection needed. A retest shows whether the gap was closed.
Is BAS safe to run in production?
It should be. FourCore ATTACK simulations are controlled and non-destructive, run within rules of engagement you agree, and clean up after themselves. No live malware spreads.
Start with one control you need to trust.
Bring a threat or a technique. We run it safely against your controls and review what was blocked, detected or missed with you.