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Radovan Brezula
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Radovan Brezula

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Reverse shell is technique when a client connects to a server and the client provides its shell to the server. Clients is typically a host hidden behind the NAT or a firewall having an access to the server but not vice versa. Thanks to a reverse shell the…
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Radovan Brezula

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This article contains a list of scripts that I created and that are somehow useful for me. You are free to download and modify them according to your needs. I do not take any responsibility for improper use or any damage caused by using them.…
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Radovan Brezula

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The tutorial describes installation steps for Clonezilla Server Edition (SE) on Ubuntu 16.04.1 LTS using a Bash script. Clonezilla is OpenSource Cloning System (OCS) and it is a partition and disk imaging/cloning program . It helps you to do system…
The tutorial describes installation steps for Clonezilla Server Edition (SE) on Ubuntu 16.04.1 LTS using a Bash script. Clonezilla is OpenSource Cloning System (OCS) and it is a partition and disk …
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Radovan Brezula

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In May 2013, Cisco opened its proprietary EIGRP protocol and released an informational RFC 7868 – Cisco’s Enhanced Interior Gateway Routing Protocol (EIGRP). It gives other vendors an opportunity to implement EIGRP protocol into their devices. A group…
In May 2013, Cisco opened its proprietary EIGRP protocol and released an informational RFC 7868 – Cisco’s Enhanced Interior Gateway Routing Protocol (EIGRP). It gives other vendors an o…
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Radovan Brezula

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I have created a virtual machine that you can use to test your forensics analysis skills. Please, download the VM, solve an assignment below and share solutions with us. 1. Assignment Your are a member of elite CSIRT team which is responsible for dealing…
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The goal of the post is to provide solutions for the first level of the game for “hackers” created by forensic lab of CESNET association. With this game CESNET introduces a work of forensic analysts and test your knowledge of Linux OS. They are several…
The goal of the post is to provide solutions for the first level of the game for “hackers” created by forensic lab of CESNET association. With this game CESNET introduces a work of fore…
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Radovan Brezula

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I like listening to video training on my smartphone while walking to work. To save the space on the memory card I convert videos to MP3 audio in advance. For this purpose I wrote a Bash script video_to_mp3.sh which helps me to manage a conversion job. The…
I like listening to video training on my smartphone while walking to work. To save the space on the memory card I convert videos to MP3 audio in advance. For this purpose I wrote a Bash script vide…
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Radovan Brezula

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In a previous tutorial I showed installation of Clonezilla Server Edition on Ubuntu using my own Bash script. We configured PXE (Pre eXecution Environment)) password for clients so when the clients booted a password had to be entered to startup. This…
In a previous tutorial I showed installation of Clonezilla Server Edition on Ubuntu using my own Bash script. We configured PXE (Pre eXecution Environment)) password for clients so when the clients…
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Radovan Brezula

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Recently I have come through an interesting problem. I needed to download a raw copy of the HDD image located on a remote server (about 180GB) connected via  1 Mbps link. Network connection dropped frequently so the requirement was to reestablish…
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Radovan Brezula

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The goal of the tutorial is to provide a solution to the forensic challenge game that I created for testing forensic skills of CSIRT team. Please be careful and run a suspicious binary file located inside a provided virtual machine only in a secured…
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Radovan Brezula

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Below are my solutions to the level 2 of the forensics lab game zero. The solutions to  the level 1 of the game are posted here. 1. Find way to reset root’s account password and retrieve flag from /root/flag.txt Reboot the VM and press ‘e ‘ edit…
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Radovan Brezula

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Tallinn, April 22, 2016 – The team from Slovakia won Locked Shields 2016, the world’s largest and most advanced international live-fire cyber defence exercise. They were closely followed by the NCIRC team from NATO and Finland. Read more here.
Tallinn, April 22, 2016 – The team from Slovakia won Locked Shields 2016, the world’s largest and most advanced international live-fire cyber defence exercise. They were closely followed by t…
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Videla som každé jedno video,ktoré sa týka tohto cvičenia :) no sú to makači
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