c99.php : A backdoored backdoor
C99 is a PHP webshell. Attackers uploads it on web server in order to get information and above all execute commands with web user privileges (ex: www-data). This webshell is protected by a customizab
noraj (Alexandre ZANNI) - Cybersecurity engineer & Pentester
Tracking down Tor users with mouse movements
Jose Carlos Norte, security researcher, wrote a post detailing how Tor Browser users can be uniquely fingerprinted using the mouse wheel, mouse speed, a CPU benchmark, and “getClientRects”. POCs (proo
How to convert VirtualBox vdi to KVM qcow2
VBoxManage can't directly convert vdi to qcow2, so there is two options : With VBoxManage convert vdi to raw and with qemu-img convert raw to qcow2 With qemu-img convert vdi to qcow2 Notes : vdi are
How to disable SSH login for the root user
Create a new user. In the following example, we will name it bob. root# useradd -m bob root# id bob uid=1000(bob) gid=1000(bob) groupes=1000(bob) Set the password for the new user. root# passwd bo
How to configure VM Auto Start in Hyper-V with PowerShell
VM automatic action at Hyper-V start up# Set-VM [VM_NAME] -AutomaticStartAction [Option] With : [VM_NAME] : The VM name [Option] : Nothing : When the host is powered on, the VM will do nothing Start
FreeBSD 10.3 is here
FreeBSD update to version 10.3. Main improvments: 15 security flaws patched UEFI support Gnome 3.16.2 Full Release Notes on official FreeBSD website.
OpenBSD 5.9 is here
OpenBSD update to version 5.9. Main improvments: Pledge - a new mitigation mechanism process in restricted mode security improved 70% of user components converted WiFi 802.11n multithread network
Examine the codes sent by the keyboard
A usefull command if are want to read keyboard input : showkey. Very useful to know keycodes when programming. What is showkey ?# showkey - examine the codes sent by the keyboard How does it work ?# s
Newsoo: a French Usenet access provider has been closed
The man known as Optix, the owner of Newsoo, was taken into custody by the DIPJ the 2016/03/22. Newsoo was a French Usenet provider, the service was delivering 2 GB of pirated data per second. Sacem p
How to change OpenSSH port on CentOS 7
Before beginning# These are the steps to do on the SSH server. Be sure to do all the steps before exiting SSH connection if you are connected via SSH. This config was tested for default CentOS 7 iso.