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Vulnerability Research.

We find the flaws before someone else does. Unknown, exploitable vulnerabilities in the systems you depend on, from userland applications and operating-system kernels to mobile apps and blockchains. And when you need breadth and assurance rather than a single deep dive, classic, methodology-driven security audits.

We respond within one business day. All testing runs under written authorization and NDA, handled in confidence.

Find the bug. Prove the impact.

Two modes: deep offensive research, and methodology-driven audits.

Vulnerability research

Deep, offensive research to surface unknown vulnerabilities in hard targets, through targeted auditing, fuzzing, and reverse engineering, backed by a proof-of-concept that proves real-world impact.

  • Targeted source and binary auditing
  • Fuzzing harnesses tuned to the target
  • Root-cause analysis and exploitability assessment
  • Proof-of-concept, up to weaponized exploits where needed
  • Coordinated-disclosure support
Windows Linux macOS Kernels iOS Android Blockchains

Security audits

Methodology-driven assessments when you need broad coverage and assurance: web applications first, with the same offensive mindset behind every test, not a checkbox run.

  • Web application penetration testing
  • Authentication, access-control, and business-logic review
  • Source-assisted (white-box) code review
  • Prioritized findings with clear remediation guidance
  • Retest to confirm the fixes hold

How an assessment runs.

An authorization gate at the start, coordinated disclosure and retest at the end.

  1. Authorization & scoping We agree on the targets, the written authorization, the rules of engagement, the depth, and the goals.
  2. Recon & mapping We map the attack surface and stand up the tooling and fuzzing harnesses we need.
  3. Testing & research Auditing, fuzzing, and exploitation against the agreed scope, methodical and logged.
  4. Reporting Every finding written up in full, with working proof-of-concept and remediation.
  5. Disclosure & retest Where a fix is involved, we support coordinated disclosure on your timeline and retest to confirm the fixes hold.

Findings you can act on.

Every issue, proven and prioritized, with everything your team needs to reproduce and fix it.

  • Executive summary in plain language
  • Full methodology and tested scope
  • Each vulnerability: root cause, impact, severity
  • Working proof-of-concept and reproduction steps
  • Prioritized, actionable remediation guidance
  • Retest results, where included
  • Technical appendix with the underlying detail
Scope

All research runs under a written authorization and agreed rules of engagement. We test only what you own or are authorized to test. Findings are handled in strict confidence, and any coordinated disclosure follows your timeline. Reverse engineering of malware and post-incident analysis are handled under Reverse Engineering and Forensics.

Scope an engagement.

Tell us what you want tested. We will scope the depth and the targets with you.

contact@sigreturn.com

The researcher you write to is the researcher who does the work. Who that is.