Attack paths, not asset lists
Map exposed services, privileged identities, cloud misconfigurations, and product weaknesses into the routes an attacker would actually use.
Open-source cyber defense with CISO-level execution
The security control plane that turns cyber assessment into action.
PhrostByte compresses scanners, endpoint telemetry, cloud posture, simulations, war room workflows, and executive reporting into one open-source foundation. We find the blast radius, prove the risk, choose the fix, and help your team run the program with fractional CISO leadership.
Linux, macOS, and Windows agentsAWS, Azure, GCP, and Kubernetes postureBreach simulations and war room workflowsFractional CISO execution
Open sourceSecurity control plane your engineers can inspect
Cross-platformEndpoint, cloud, SaaS, app, and identity coverage
CISO-gradeRisk narrative, remediation plan, and operating cadence
Built to see the modern attack surface as one connected system
Endpoint telemetryCloud attack pathsSaaS exposureSupply chain riskAI defenseWar room response
Platform
One product surface for the security work that usually gets scattered.
PhrostByte brings endpoint agents, cloud scanners, SaaS review, supply chain analysis, AI defense, simulations, response workflows, and executive evidence into one open-source operating layer.
Assessment command center
It does not just find risk. It organizes the work of reducing it.
We correlate telemetry, posture, identity, application exposure, and response readiness into a living risk register that shows what matters, why it matters, who owns it, and what happens next.
15+security domains connected into one risk view
3 OSLinux, macOS, and Windows endpoint coverage
4 cloudsAWS, Azure, GCP, and Kubernetes posture
Assessment evidence that survives scrutiny
Turn endpoint, SaaS, cloud, and application signals into findings with evidence, severity, business impact, owner, and remediation context.
From kernel signal to board story
Translate low-level telemetry and control gaps into the language leaders need: exposure, likelihood, impact, tradeoff, and next move.
A CISO operating system
Run governance, customer trust, vendor review, roadmap ownership, tabletop exercises, and executive reporting without waiting for a full-time hire.
Remediation with momentum
Prioritize the fixes that collapse the largest blast radius first, then track owners, exceptions, decisions, and proof of progress.
Open-source trust by design
Inspect and extend the agents, collectors, simulations, dashboards, and control-plane code instead of taking a black box on faith.
Security should feel less like a pile of tools and more like command.
The strongest security programs have one thing in common: they know what matters, who owns it, and how fast the organization can respond. PhrostByte gives that clarity to technical teams and executives.
SeeUnify endpoint, cloud, SaaS, application, identity, and supply chain signals
DecideTurn complex telemetry into attack paths, business impact, and clear priorities
MoveConvert risk into owners, timelines, response drills, and executive confidence
Solutions
Beautifully direct services for serious security outcomes.
Start with a sharp view of exposure, then turn that insight into roadmap, governance, engineering work, customer confidence, and incident readiness.
Cyber assessment
A cyber assessment that reads like an attacker's map and a CISO's action plan.
- Cloud, SaaS, endpoint, application, and identity exposure review
- Attack paths, control gaps, data risk, and response readiness
- A prioritized risk register with owners, impact, and proof
Fractional CISO services
Security leadership that turns findings into decisions, rituals, trust, and measurable progress.
- Roadmap, risk governance, budget narrative, and board reporting
- Customer trust, vendor review, policy, and compliance support
- Incident readiness, tabletop planning, and response ownership
Open-source PhrostByte platform
A transparent control plane that can grow from assessment evidence into an operating security system.
- Auditable endpoint agents, cloud scanners, and dashboard workflows
- Local breach simulations, response drills, and investigation views
- Extensions for your telemetry, stack, and operating model
Built for teams where security has to become a business advantage.
Walk into diligence with a real security story
Replace scattered answers with evidence, a roadmap, and a crisp explanation of how your team manages cyber risk.
Give engineers the fixes that actually matter
Collapse the highest-risk attack paths across cloud, identity, SaaS, endpoints, and application delivery without derailing product work.
Operate like a security team twice your size
Bring structure to governance, incident readiness, vendor review, customer assurance, executive reporting, and response practice.
Architecture
A security operating layer from raw signal to board-level decision.
PhrostByte is not another scanner report. It is a coordinated control plane for telemetry, posture, incident workflow, simulation, risk governance, and leadership reporting.
01
Instrument the real surface
Auditable agents, collectors, and importers gather endpoint, cloud, SaaS, application, identity, and supply chain context.
02
Correlate risk into evidence
The control plane links exposures, identities, control gaps, attack paths, and supporting artifacts into a defensible risk register.
03
Operate the security program
Fractional CISO workflows turn findings into remediation, executive reporting, customer trust, tabletop exercises, and governance.
Platform highlights
- Native endpoint agents for Linux, macOS, and Windows
- Multi-cloud posture, attack paths, Kubernetes, SaaS, and supply chain analysis
- War room collaboration, response queue, simulations, and executive briefing workflows
- Open-source implementation path with fractional CISO operating support
Teams can run it locally, exercise scenarios in simulation stacks, or extend it into production workflows while preserving one consistent model for evidence, action, and accountability.
What changes after PhrostByte
Evidence, severity, business impact, remediation steps, accountable owners, and the reasoning behind every priority.
Roadmap decisions, customer trust requests, vendor review, policy work, incident readiness, and executive reporting in one rhythm.
Transparent agents, collectors, simulations, and dashboards your engineers can run, inspect, adapt, and grow into real operations.
Pricing
Choose the path from impressive tooling to undeniable security progress.
The platform is open source. The service is senior security judgment, disciplined execution, and the operating rhythm that turns insight into visible risk reduction.
A concentrated engagement for teams that want the truth about their exposure and the plan to reduce it.
- Attack surface, cloud, SaaS, endpoint, identity, and application review
- Attack-path findings with evidence, business impact, and owners
- Executive readout plus a 30/60/90-day remediation plan
Ongoing security leadership for teams that need CISO judgment before they need a full-time hire.
- Security roadmap, risk governance, board narrative, and budget tradeoffs
- Customer trust, vendor review, policy, and compliance support
- Incident readiness, tabletop exercises, and response ownership
Implementation help for teams turning the PhrostByte platform into their own security operating layer.
- Deployment planning, telemetry integrations, and simulation environments
- Custom collectors, dashboards, response workflows, and evidence exports
- Training for engineers, analysts, and security program owners
Resources
Sharper thinking for security leaders building serious programs.
Explore how we think about assessment, open-source security infrastructure, fractional CISO rhythm, and the shift from scattered tools to accountable security operations.
Cyber Assessment Field Guide
How to turn telemetry, posture, and control gaps into an assessment that leadership can act on.
Read more
Blueprint: Fractional CISO Operating Rhythm
A practical cadence for roadmap, governance, customer trust, incident readiness, and executive confidence.
Read more
Signals & Stories: Episode 07
PhrostByte founders unpack open-source security tooling, assessment lessons, and why trust is an operating system.
Read moreKnowledge Base
Encyclopedia of threats PhrostByte neutralizes.
Use the interactive encyclopedia to zero in on the adversary behaviors PhrostByte already neutralizes. Mix and match search, domain filters, and tactic tags to surface the coverage that matters most to your mission.
Domain filters
Tactic tags
Showing 24 coverage patterns across 4 knowledge domains.
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Deep coverage across the modern kill chain: our encyclopedia fuses human research and field telemetry to document relevant attack families and assessment signals.
Phishing & business email compromise
LLM-powered classifiers inspect linguistics, attachments, and brand impersonation signals to quarantine malicious messages, enforce DMARC, and trigger step-up verification for targeted identities before takeover occurs.
Credential theft & session hijacking
Continuous behavioral analytics flag password sprays, MFA fatigue, and OAuth token replay across SaaS and edge apps; PhrostByte rotates secrets, invalidates sessions, and rebuilds trust relationships automatically.
Ransomware & destructive malware
Kernel-level sensors catch file staging, shadow copy deletion, and encryption loops in milliseconds, isolating affected nodes, snapshotting data, and restoring golden images without analyst intervention.
Supply chain & dependency poisoning
SBOM-aware scanners vet open-source components, container layers, and infrastructure templates, while signed artifact enforcement and drift detection block compromised releases from reaching production.
API & web exploitation
Adaptive WAF and behavior analytics help identify injection, deserialization, SSRF, and account takeover attempts across web and API surfaces.
Insider threat & privilege misuse
Graph-based UEBA correlates access patterns, data movement, and ticketing context to expose malicious insiders or compromised admins, applying just-in-time controls and co-sign approvals on high-risk actions.
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Unified protection for multi-cloud, edge, and CI/CD estates keeps deployments compliant and resilient without sacrificing developer velocity.
Identity & access hardening
PhrostByte continuously evaluates IAM policies, temporary credentials, and cross-account trust chains to block privilege escalation, enforce least privilege, and auto-redeem misused roles.
Data perimeter & storage governance
Real-time detectors monitor object storage, secrets vaults, and databases for public exposure, unencrypted assets, and anomalous egress, automatically sealing buckets and revoking offending keys.
Container & Kubernetes runtime security
Admission controllers and eBPF instrumentation spot rogue containers, namespace breakout attempts, and suspicious syscalls, applying policy quarantine and drift rollbacks to clusters.
Serverless & event-driven workloads
Function-level tracing baselines payloads, environment variables, and outbound calls to defeat injection, cold-start tampering, and data exfiltration from serverless or edge compute nodes.
CI/CD pipeline integrity
PhrostByte signs builds, verifies provenance with Sigstore integrations, scans infrastructure-as-code pipelines for secrets, and halts deployments when anomalous committers or toolchains appear.
Multi-cloud network segmentation
Dynamic policy orchestration builds micro-segmentation guardrails across VPCs, service meshes, and edge POPs, auto-remediating shadow services and unsanctioned pathways.
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Host-level detection packs and automated playbooks ensure Linux fleets, containers, and appliances remain uncompromised even under sustained attack.
Kernel & container escapes
Real-time eBPF probes catch namespace pivots, privilege boundary tampering, and suspicious module loads, containing pods or hosts before attackers touch the control plane.
Privilege escalation tooling
Detection packs trace sudoers changes, SUID abuse, polkit exploitation, and compiled exploits, revoking credentials and restoring hardened configurations automatically.
Persistence mechanisms
File integrity monitoring tracks cron jobs, systemd units, rc scripts, and LD_PRELOAD hooks, rolling back unauthorized autoruns and raising prioritized cases to responders.
Lateral movement via SSH
Behavioral analytics spot key sharing, agent forwarding, and novel east-west SSH routes, triggering network segmentation and step-up MFA for targeted accounts.
Crypto-mining & resource hijacking
PhrostByte correlates CPU/GPU telemetry, process lineage, and outbound pool beacons to terminate mining workloads, reclaim resources, and trace originating exposures.
Log tampering & anti-forensics
Immutable logging pipelines and tamper-evident storage alert on log deletion, timestamp manipulation, and auditd suppression, ensuring investigators retain trusted evidence.
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Comprehensive instrumentation for Microsoft ecosystems helps assess Active Directory, endpoints, productivity suites, and response workflows.
Active Directory & Kerberos exploits
Domain controllers stream DCSync, Golden/Silver Ticket, and ACL tampering signals into PhrostByte, which auto-resets secrets, rotates KRBTGT keys, and stages honey accounts.
PowerShell & scripted intrusions
Deep script inspection correlates AMSI events, obfuscated PowerShell, and signed-but-malicious modules, enforcing constrained language mode and isolating offending hosts.
Lateral movement tradecraft
Sequence analytics expose SMB, RDP, WMI, and PsExec pivot chains, orchestrating firewall changes and endpoint isolation before attackers consolidate access.
Credential dumping & secret theft
LSASS, SAM, and DPAPI access attempts are intercepted with in-memory canaries and virtualization-based security enforcement, instantly expiring harvested credentials.
Persistence via registry & services
Run key edits, scheduled tasks, WMI subscriptions, and service binary swaps trigger guided remediation that restores baseline values and notifies identity owners.
Office & LOLBin abuse
PhrostByte profiles macro execution, COM abuse, and living-off-the-land binaries such as mshta or rundll32, cutting malicious parent chains and hardening application control policies.
Start with a cyber assessment
Make your security posture something customers, investors, and engineers can trust.
PhrostByte turns hidden exposure into a beautiful operating picture: risk you can prove, actions you can assign, and a security program leadership can understand.
Contact
Let's turn your security posture into a stronger story.
Cyber assessment
We map your exposure, controls, cloud and SaaS posture, identity risk, and response readiness into an assessment leadership can act on.
Fractional CISO services
We run the security operating rhythm: roadmap, governance, customer trust, vendor review, incident readiness, and executive reporting.
Work with us
Remote-first cyber assessment and fractional CISO support for teams building serious security programs.
jj@tensorspace.aiQuestions we hear most often.
What does PhrostByte offer?
PhrostByte offers cyber assessment, fractional CISO services, and implementation support around an open-source security control plane.
Is PhrostByte open source?
Yes. The platform is open source so your engineers can inspect the endpoint agents, cloud collectors, simulations, dashboard, and control-plane code.
How does a cyber assessment work?
We scope the environment, gather evidence, review exposure across key domains, validate the highest-risk attack paths, and deliver a prioritized remediation roadmap.
What do fractional CISO services include?
Fractional CISO services include security roadmap ownership, governance, executive reporting, customer trust support, vendor review, policy work, and incident readiness.