Cybrus delivers offensive security expertise and defensive intelligence to protect your business from the world's most sophisticated cyber threats — before they strike.
Our security engineers operate like elite red-team hackers — finding your weaknesses before the adversaries do.
We don't just run scanners. We think like attackers and deliver intelligence that drives real security outcomes.
Our team thinks and operates like adversaries — using the same tools, tactics, and techniques as real-world threat actors to expose your weaknesses first.
No jargon-filled PDFs. Every finding comes with a clear risk rating, business impact analysis, and step-by-step remediation guidance your team can act on.
OSCP, CEH, CISSP-certified professionals with deep expertise in modern attack surfaces — web, mobile, cloud, AI/ML, and beyond.
Engagement kickoff within 48 hours. No bureaucratic delays. Our lean team moves at the speed of modern business.
From web apps to AI/LLM systems — we cover every layer of your digital infrastructure with comprehensive security assessments.
Security isn't a one-time event. We offer retainer programs, continuous monitoring, and quarterly assessments to keep you protected year-round.
A structured, repeatable methodology that delivers consistent, high-quality results every engagement.
"Cybrus found critical vulnerabilities in our payment infrastructure that three other firms missed. Their depth of expertise is unmatched. We've made them our go-to security partner."
"The red team exercise Cybrus conducted exposed gaps in our detection capabilities we didn't know existed. The report was executive-ready and the fixes were clearly explained."
"Their AI/LLM security assessment helped us pass our enterprise compliance audit. Cybrus is the only firm I've found that truly understands modern AI attack surfaces."
A sample of engagements where our offensive security expertise found what others missed — and helped clients build lasting resilience.
A fast-growing payment gateway engaged Cybrus for a black-box web application penetration test ahead of a major funding round. Within 18 hours, our team discovered a chained exploit — an unauthenticated IDOR vulnerability combined with a mass assignment flaw in the transaction API — that would have allowed any attacker to initiate and approve fund transfers from arbitrary accounts without authentication. The exploit required zero privileges and was accessible from the public internet.
An enterprise AI assistant platform hired Cybrus to assess their LLM pipeline before a Fortune 500 enterprise onboarding. Our team discovered a multi-turn prompt injection attack that bypassed all content filters and exfiltrated the complete system prompt — including confidential business logic instructions — within 4 conversation turns. A secondary jailbreak allowed arbitrary tool-call execution against integrated APIs.
A telemedicine platform with over 1.2M registered patients engaged Cybrus after a tip from a security researcher. Our API security testing revealed a complete Broken Object Level Authorization (BOLA) flaw across all patient-facing endpoints — any authenticated user could access, modify, or delete any other patient's consultation history, prescriptions, and diagnostic reports by incrementing a numeric ID parameter.
During a cloud security assessment for a B2B SaaS company, Cybrus identified a critically misconfigured IAM trust policy that allowed any authenticated AWS account — including external ones — to assume a high-privilege role with full S3, RDS, and EC2 administrative access. A chained attack using a publicly exposed Lambda function could have escalated to complete cloud account takeover without any credentials from the target organization.
A consumer fintech app with 800K+ downloads contracted Cybrus for a mobile security assessment ahead of an RBI compliance review. Static analysis of the Android APK revealed hardcoded AWS credentials and a production Stripe secret key embedded in the app binary. Dynamic analysis further uncovered unencrypted PII storage in SharedPreferences and a traffic interception vulnerability in the certificate pinning implementation that allowed MitM attacks on rooted devices.
A 500-person enterprise engaged Cybrus for a full-scope red team operation to test their detection and response capabilities. Using a targeted spear phishing campaign with a lure themed around a fake IT policy update, we achieved initial access within 6 hours. Over 3 weeks, the team moved laterally through the network undetected, escalated to Domain Admin, and exfiltrated a simulated "crown jewels" dataset — all without triggering a single SIEM alert.
Every service is delivered by certified experts using the same techniques as nation-state adversaries — so you know exactly where you stand.
Deep-dive manual testing of your web applications against OWASP Top 10, business logic flaws, authentication bypasses, and advanced injection vulnerabilities. We go far beyond automated scanners.
Comprehensive testing of REST, GraphQL, and gRPC APIs for broken authentication, excessive data exposure, mass assignment, rate limiting failures, and BOLA/BFLA vulnerabilities.
Static and dynamic analysis of Android and iOS applications. We test local storage, traffic interception, reverse engineering protections, and backend API integration security.
Full review of your cloud infrastructure configuration — IAM policies, storage permissions, network security groups, logging gaps, and compliance posture across AWS, Azure, and GCP environments.
Cutting-edge testing for prompt injection, jailbreaking, data poisoning, model inversion, and insecure RAG pipelines. We secure your AI systems before adversaries exploit them.
Full-scope adversarial simulations mimicking APT groups. Physical access, social engineering, phishing, C2 infrastructure, lateral movement — we test your entire security posture end-to-end.
Systematic identification and prioritization of vulnerabilities across your infrastructure. Get a clear picture of your attack surface with CVSS-scored findings and remediation roadmaps.
Expert manual review of your source code for security vulnerabilities — SQL injection, XSS, SSRF, insecure deserialization, cryptographic weaknesses, and more across any language or framework.
Design, launch, and manage your bug bounty program. We help define scope, build triage processes, coordinate with platforms like HackerOne and Bugcrowd, and establish clear reward policies.
Strategic security advisory for startups and enterprises. From building security programs from scratch to compliance readiness (SOC 2, ISO 27001, PCI DSS) — we guide your security journey.
Cybrus was founded by security researchers who grew tired of seeing organizations suffer avoidable breaches. We built the firm we always wished existed — one that actually thinks like an attacker.
We believe security shouldn't be a checkbox — it should be a competitive advantage. Every business that trusts us becomes part of a more resilient digital ecosystem.
Our mission is simple: expose vulnerabilities before adversaries do, deliver intelligence that drives change, and partner with our clients on their long-term security journey.
We envision a future where security is built-in, not bolted-on. Where organizations think proactively about threats, and where the defenders stay one step ahead. Cybrus exists to accelerate that future — one client at a time.
Targeted, methodical testing that wastes no time and misses nothing critical.
We work alongside your team, not above them. Security is a team sport.
Continuously advancing our techniques to stay ahead of the evolving threat landscape.
Cybrus Security established by a team of OSCP-certified researchers with a mission to democratize elite security.
Rapidly grew to serve 50+ clients across FinTech, HealthTech, and SaaS. Established our core methodology.
Launched India's first dedicated AI/LLM security testing practice as the AI threat landscape emerged.
Crossed 500 security engagements and 2,400+ critical vulnerabilities discovered and remediated.
Recognized as a top-tier cybersecurity firm with 99% client retention and expanded team of 20+ experts.
Not a consultant who reads about security — a practitioner who has broken real systems, reported vulnerabilities to major platforms, and built security programs from scratch.
"I started Cybrus because I kept seeing the same story — companies breached not by sophisticated nation-state actors, but by basic, preventable vulnerabilities that no one had bothered to find. We built the firm I always wished existed."— Tanveer Kaur Sachdeva, Founder & CEO, Cybrus Security
Ready to secure your business? Reach out through any channel or book a call directly. Our team typically responds within 2 hours during business hours.
For security emergencies or urgent penetration test requests, we guarantee a response within 2 hours during business hours (9 AM – 7 PM IST, Monday–Saturday).
Schedule a free 30-minute security consultation with one of our experts. We'll assess your current security posture, discuss threat scenarios relevant to your industry, and recommend the right engagement for your needs.
All consultations are protected by strict NDAs. Your business information, infrastructure details, and any vulnerabilities discussed remain completely confidential. We are bound by professional ethics and contractual obligations to protect your data.