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Martin Haller

In the Head of the Network Administrator: Thoughts, Ideas, Insights

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Business E-mail Compromise: Leading Cyberattacks
IT Security

Business E-mail Compromise: Leading Cyberattacks

By martinhaller
2020-09-15
0

Business E-mail Compromise cyber attacks type Counterfeiting emails, identity theft aimed at making money. How do the BEC attacks work?

What Does Ransom Negotiation Look Like
Ransomware

What Does Ransom Negotiation Look Like

By martinhaller
2020-07-24
0

Demonstration of real communication between ransomware victims and hackers. Ransom negotiation, contract prices, pro-customer approach and non-stop support.

How Could Hackers Attack Vltava Basin? OSINT Research
IT Security

How Could Hackers Attack Vltava Basin? OSINT Research

By martinhaller
2020-06-22
0

How to use publicly available information and find a security flaw in the network? OSINT method and Vltava Basin hack case study.

How To Recover a Network After a Ransomware Attack
Ransomware

How To Recover a Network After a Ransomware Attack

By martinhaller
2020-06-15
0

How to restore a corporate computer network after a ransomware attack? What to start with? I´m sharing the (hard-earned) experience so that you can restore operations as soon as possible.

Why Using VPN to Secure RDP Will Not Stop Hackers
IT Security

Why Using VPN to Secure RDP Will Not Stop Hackers

By martinhaller
2020-06-08
0

Wondering how to increase RDP (remote desktop) security? Let me tell you how hackers most often hack RDPs and why VPN won’t change anything about it.

EPYC Case Study: Servery DELL 15. AMD Gen Once Again
From Practice

EPYC Case Study: Servery DELL 15. AMD Gen Once Again

By Martin Melich
2020-06-01
0

We have been testing the Dell PowerEdge R7515 server with a 2nd generation AMD EPYC processor. How did the AMD EPYC do vs. Intel at 4 of our customers?

How Hackers Attack Companies Through Their IT Providers
IT Security

How Hackers Attack Companies Through Their IT Providers

By martinhaller
2020-03-09
0

No matter how much you invest in IT security if your provider messes around. Beware of hacker attacks through providers.

Hackers came up with a new trick. They learned to improve their blackmailing with ransomware
IT Security

Hackers came up with a new trick. They learned to improve their blackmailing with ransomware

By martinhaller
2020-02-04
0

Ransomware actors have a new trick. None of backup solutions can mitigate it. They are threatening to release all the stolen information.

What hackers can do in your network
IT Security

What hackers can do in your network

By martinhaller
2020-01-22
0

Companies end up without data or backups after a ransomware attack because they underestimate the skills of hackers. Learn what a hacker can do within your network and how to improve security.

Security insights: Laptop webcam hack
IT Security

Security insights: Laptop webcam hack

By martinhaller
2019-11-04
0

Did you tape your webcam because you’re afraid of hackers? The video shows how easy it is to hack a laptop webcam. Do you know how to defend getting hacked?

HackerFest 2019 Workshop Sample
IT Security

HackerFest 2019 Workshop Sample

By martinhaller
2019-10-24
0

We have made one Linux virtual server available for you to hack from the comfort of your home just after the HackerFest 2019. Go on!

Are Updates Really So Important?
Know-How

Are Updates Really So Important?

By martinhaller
2019-10-02
0

To update or not to update? Updates are a neverending topic. In this article, you will learn why to update and how often.

Windows 7 and Windows Server 2008 support ends. What to do?
From Practice

Windows 7 and Windows Server 2008 support ends. What to do?

By martinhaller
2019-07-26
0

Windows 7 and Windows Server 2008 R2 support will end on January 14, 2020. Upgrades are fully underway. What do we replace Windows with?

My view of IT certification MCSE, CCNP, ECSA, CHFI, OSCP
Personal

My view of IT certification MCSE, CCNP, ECSA, CHFI, OSCP

By martinhaller
2019-07-15
0

Are you considering where to get certified? I bring my insight into IT certification MCSE, CCNP, ECSA, CHFI, OSCP. Training, exam, practical benefits, price.

OSCP: Offensive Security Certified Professional
IT Security

OSCP: Offensive Security Certified Professional

By martinhaller
2019-06-25
0

Over 60 servers hacked, 5 months of life and 1 exam. My path to OSCP certification: Offensive Security Certified Professional.

Ubiquiti UniFi Case Study: Hradec Králové Stadium Connectivity
From Practice

Ubiquiti UniFi Case Study: Hradec Králové Stadium Connectivity

By Martin Tuček
2019-06-20
0

We needed to cover a stadium for 500 participants cheaply and without downtime. We chose AP Ubiquiti UniFi. UniFi controller review and conclusion.

Security Insights: How to Get Hacked by a RDP Server
IT Security

Security Insights: How to Get Hacked by a RDP Server

By martinhaller
2019-05-08
0

Compromised computer or stolen data? Watch a video on how to get hacked by a RDP server. And then read how to defend against this attack.

TeamViewer: 4-Year User Review (Part 2/2)
Know-How

TeamViewer: 4-Year User Review (Part 2/2)

By martinhaller
2019-03-25
0

TeamViewer and its imperfections. What don’t we like after 4 years of use? And how do we set TeamViewer up to be as safe as possible?

TeamViewer: 4-Year User Review (Part 1/2)
Know-How

TeamViewer: 4-Year User Review (Part 1/2)

By martinhaller
2019-03-11
0

TeamViewer is our remote user support tool. We can handle over 270 connections a week. What do we like about TeamViewer? And why did we buy it?

Monitoring system video: How We Oversee 2000+ Network Devices
Know-How

Monitoring system video: How We Oversee 2000+ Network Devices

By martinhaller
2018-12-10
0

The monitoring system, thanks to which we have our networks in order and a constant overview of their health. Practical video directly from the production environment.

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Where you can meet me

  • 17. 9. Hacker Fest 2020 [CZ] (Online) - Backups which won't survive ransomware.
  • 23. 9. Solarwinds Virtual Roadshop Europe [EN] (on-line) - The security oportunity.
  • 7. 10. Amenit Days 2020 [CZ] (Nový Jíčín, Czech Republic) - Why are ransomware attacks so devastating.
  • 7. 10. Amenit Days 2020 [CZ] (Nový Jíčín, Czech Republic) - Lateral Movement.
  • 9. 10. SAMBA MBA [CZ] (Brno) - IT Security.
  • 11. 11. Cyber Security [CZ] (Online) - Stories from battlefield with cyber crooks.
  • 24. 11. SolarWinds [EN] (Online) - Talking Security With Your Customers.

Martin Haller

I am passionate about computer technologies with focus on cyber security. I work for company PATRON-IT s.r.o. which I have cofounded.

My goal is to make advanced expensive technologies available to medium and small business by creating best practices and utilizing automatization.

OSCP MCSE: Microsoft Solutions Expert
CHFI: Computer Hacking Forensic Investigator ECSA: EC-Council Certified Security Analyst
Cisco Certified Network Professional - Routing & Switching Cisco Certified Network Associate - Security
Hack The Box
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LinkedIn | Martin Haller
martin.haller@patron-it.cz
Martin Haller