Incident Response
Client engages IstroSec to handle active breaches, using a public track record of hundreds of incident response engagements and certified responders.
Ask about this →IS
IstroSec s.r.o.
European cybersecurity firm helping SMEs, enterprises and governments with incident response, threat intelligence and cyber advisory
Responds to active intrusions, performs threat hunting and advises on cyber resilience; GRYPHON RPT has protected 11,500+ endpoints since January 2025 with zero ransomware breaches.
- Engagement models
- Retainer, Project, Workshop or training
- Languages
- English, Slovak, Polish
- Works in
- Europe, United States, Global
- Ideal client stage
- Bootstrapped, Established business, Enterprise
- Ideal client size
- 11 to 50 people, 51 to 200 people, More than 1,000 people
Services
What you can hire IstroSec s.r.o. for
Managed Defense / CSIRT subscription
Client subscribes to accredited IstroCSIRT services (Trusted Introducer) for ongoing managed defense and CSIRT capabilities.
Ask about this →Threat Hunting
Client commissions proactive hunts by certified analysts using intelligence derived from the firm's past engagements.
Ask about this →Digital Forensics
Client delegates evidence collection and forensic analysis to specialists certified with GCFE, GCFA and GREM for investigations and legal support.
Ask about this →Malware Analysis
Client provides samples for reverse engineering and malware capability analysis performed by analysts holding GREM and OSCP certifications.
Ask about this →Offensive Security (Vulnerability Assessment, Pentest, Red/Purple Team)
Client orders vulnerability assessments, pentests or red-team style exercises executed by certified offensive specialists to expose exploitable gaps.
Ask about this →Audit & Advisory (including CISO-as-a-service)
Client secures audits or CISO-as-a-service informed by public references from governments and enterprises listed on the firm's site.
Ask about this →Trainings and Exercises
Client books practical trainings and simulation exercises delivered by practitioners, including those who contributed to the LockedShields 2016 winning team.
Ask about this →Fit
Is IstroSec s.r.o. right for you?
A good fit if you are
- A bootstrapped company, an established business or an enterprise with 11 to 50 people, 51 to 200 people or More than 1,000 people
- In government, public sector or nonprofit
- Based anywhere: they work globally
How they engage
- Retainer
- Ongoing work on a recurring basis.
- Project
- A defined scope with one outcome.
- Workshop or training
- Sessions that teach your team a method or a skill.
Proof points
GRYPHON RPT endpoint protection
Since January 2025 GRYPHON RPT has protected over 11,500 endpoints with zero ransomware breaches reported.
Case study on istrosec.com ↗ADFIR EU project funding
Total eligible expenditure: 889 067,09 €; total funding from the mechanism: 820 795,20 €; eligible expenditure for IstroSec: 170 200,80 €.
Case study on istrosec.com ↗Research & CVE disclosures
Disclosed CVE-2022-24501, CVE-2021-41330 and CVE-2021-34971 among other vulnerabilities.
Case study on istrosec.com ↗Managed Defense detection of LummaStealer
Managed Defense threat-hunting led to timely detection and mitigation of an active LummaStealer attacker campaign.
Case study on istrosec.com ↗Track record of incident response engagements
Has a track record of hundreds of incident response engagements, including responses to APT groups.
Case study on istrosec.com ↗About IstroSec s.r.o.
Rapid, hands-on containment and cross-border coordination for organisations facing active cyber incidents, backed by an accredited CSIRT and certified specialists. IstroSec favours operational readiness, evidence-led investigations and practical threat knowledge, proven by a public track record of hundreds of incident response engagements, membership of the LockedShields 2016 winning team, and IstroCSIRT accreditation in Trusted Introducer.
Industries served
All sources checked 15 Oct 2026.
Questions and answers
How do I contact IstroSec s.r.o.?
Use Contact IstroSec s.r.o. on this page and describe what you need. Haycion passes your request to IstroSec s.r.o., and they reply to the email you give.
Have a project for IstroSec s.r.o.?
Send them a request. They reply by email.
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