Modifier mot de passe Windows depuis Ubuntu

Windows est faible, tout le monde le sait. Un mot de passe de session Windows n’est qu’une barrière physique visant à décourager les pirates lambdas. Mais il est tellement simple d’accéder à une session Windows protégée par mot de passe

La preuve dans la suite.

Ce tutoriel a un but instructif. Fotozik ne pourra être tenu pour responsable de vos quelconques actes malveillants.

Ce hack fonctionne pour toutes les versions de Windows 2000 à Windows 7.

Il vous faudra:
- un Live CD ubuntu (9.10 de préférence)
- le paquet chntpw (http://packages.ubuntu.com/lucid/chntpw)

C’est tout, je peux accéder à n’importe quel ordinateur Windows avec ça? Oui, c’est tout.

Etape 1:

démarrez le Live CD Ubuntu (il suffit la plupart du temps d’allumer l’ordinateur avec le cd à l’intérieur).

Etape 2:

installez le paquet chntpw. Soit vous l’avez sur une clé usb et vous double-cliquez dessus, soit vous le téléchargez depuis l’adresse http://packages.ubuntu.com/lucid/chntpw et vous double-cliquez dessus.

Etape 3:

montez le disque Windows. Pour cela, cliquez sur Raccourcis dans le menu du haut, puis sur le disque correspondant à votre partition/disque Windows (cherchez celui qui a la même taille).

Etape 4:

notez l’étiquette de votre disque dur. Dans la fenêtre qui s’ouvre, la barre de titre contient quelque chose du genre AC24FEB56EFA31EC.

Etape 5:

ouvrez un terminal (Applications->Accessoires->Terminal)

Etape 6 (la plus délicate):

tapez

cd /media//WINDOWS/system32/config/

Par exemple

cd /media/AC24FEB56EFA31EC/WINDOWS/system32/config/

Tapez ensuite

sudo chntpw SAM

A vous de choisir maintenant ce que vous voulez faire, 1 pour effacer le mot de passe, 2 pour le modifier, 3 pour donner le rôle d’administrateur à un utilisateur. Validez ensuite avec la touche y.

Vous pouvez aussi choisir de modifier un autre mot de passe que celui de l’administrateur en tapant

sudo chntpw -u user SAM

Etape 7:

Voilà, redémarrez et entrez dans Windows.

Comment se protéger de cette attaque? Changer l’ordre de boot pour ne pas commencer par le CD et mettre un mot de passe BIOS.

Installing Ubuntu

Now that you have the Desktop CD, you'll need to reboot your computer to use Ubuntu.

Your computer's BIOS must be set to boot from CD first; otherwise, Windows will just load up again. To get into the BIOS settings, you usually have to press one of these keys during boot-up: Escape, F1, F2, F12, or Delete. Usually your computer will tell you which key to use.

Once your BIOS is configured to boot from CD first, if you have Ubuntu in the drive, you should see this screen. Ubuntu will take a couple of minutes to load up. Just be patient.

Select your preferred language.

If you have at least 512 MB of RAM, you may want to select Try Ubuntu, as it will allow you to do other things (check your email, browse the web) while you're installing Ubuntu.

If you have only 256 MB or 384 MB of RAM, you should select Install Ubuntu. This will give you the same installation screens you see below, but you won't have the rest of the Ubuntu live session running as well.

If you have less than 256 MB of RAM, you should use the Alternate CD to install Ubuntu, or do a barebones installation.

If you choose to install Ubuntu directly, the installer will launch immediately. If you choose the Try Ubuntu option, you'll be in the Ubuntu live session. From there, click the Install Ubuntu icon on the desktop.

Answer the questions as best you can. Most of them should be self-explanatory.

By default, the installer will give you the option to install Ubuntu side by side with whatever operating system is currently on your computer. You can choose that if you want to set up a dual-boot, but as I stated before, the safest dual-boot is probably with Wubi, unless you know what you're doing (in which case you shouldn't be looking at this guide).

For simplicity's sake, you should select Use the entire disk. Or, if you don't want to erase your entire drive, click Quit and then boot back into Windows and set up a dual-boot using Wubi.

The next screen will ask you for your username and password. On some smaller screens, you may have to scroll down to see some of the other options.

Once you're sure you want to do this (this will erase your entire hard drive—make sure everything is backed up first!), click Install.

If you booted Try Ubuntu, you can still keep using the live CD to play games or surf the web while Ubuntu is installing. There is also a slideshow you can watch.

More slideshow.

Still more slideshow.

Yeah.

That's right.

Eventually, the installation will finish (the whole thing can take anywhere between 15 minutes and an hour, depending on the speed of your computer). You can either Continue Testing if you want to shutdown your computer or Restart Now if you want to restart your computer.

Either way, Ubuntu will eject your CD (or prompt you for when to remove your USB stick, if you used UNetBootIn instead of a CD burning program). The next time you boot up, you should have a working Ubuntu installation!

How to identify Open Ports in ubuntu with nmap

Nmap is a utility for network exploration or security auditing. It supports ping scanning (determine which hosts are up), many port scanning techniques, version detection (determine service protocols and application versions listening behind ports), and TCP/IP fingerprinting (remote host OS or device identification).

Nmap also offers flexible target and port specification, decoy/stealth scanning, sunRPC scanning, and more. Most Unix and Windows platforms are supported in both GUI and commandline modes. Several popular handheld devices are also supported, including the Sharp Zaurus and the iPAQ.
Install nmap in ubuntu

sudo apt-get install nmap

Nmap examples

Here are some Nmap usage examples, from the simple and routine to a little more complex and esoteric. Some actual IP addresses and domain names are used to make things more concrete. In their place you should substitute addresses/names from your own network.. While I don’t think port scanning other networks is or should be illegal, some network administrators don’t appreciate unsolicited scanning of their networks and may complain. Getting permission first is the best approach.

For testing purposes, you have permission to scan the host scanme.nmap.org. This permission only includes scanning via Nmap and not testing exploits or denial of service attacks. To conserve bandwidth, please do not initiate more than a dozen scans against that host per day. If this free scanning target service is abused, it will be taken down and Nmap will report Failed to resolve given hostname/IP: scanme.nmap.org. These permissions also apply to the hosts scanme2.nmap.org, scanme3.nmap.org, and so on, though those hosts do not currently exist.

nmap -v scanme.nmap.org

This option scans all reserved TCP ports on the machine scanme.nmap.org . The -v option enables verbose mode.

nmap -sS -O scanme.nmap.org/24

Launches a stealth SYN scan against each machine that is up out of the 256 IPs on “class C” sized network where Scanme resides. It also tries to determine what operating system is running on each host that is up and running. This requires root privileges because of the SYN scan and OS detection.

nmap -sV -p 22,53,110,143,4564 198.116.0-255.1-127

Launches host enumeration and a TCP scan at the first half of each of the 255 possible eight-bit subnets in the 198.116 class B address space. This tests whether the systems run SSH, DNS, POP3, or IMAP on their standard ports, or anything on port 4564. For any of these ports found open, version detection is used to determine what application is running.

nmap -v -iR 100000 -Pn -p 80

Asks Nmap to choose 100,000 hosts at random and scan them for web servers (port 80). Host enumeration is disabled with -Pn since first sending a couple probes to determine whether a host is up is wasteful when you are only probing one port on each target host anyway.

cryptmount

cryptmount is a utility for GNU/Linux operating systems which allows an ordinary user to mount an encrypted filing system without requiring superuser privileges. It is aimed at recent Linux systems using the 2.6 kernel series. cryptmount was written to make it as easy for ordinary users to access encrypted filesystems on-demand using the newer devmapper mechansism as it was to use the older, now deprecated, cryptoloop methods. This offers the following advantages:

Details

• Website : http://cryptmount.sourceforge.net/

• Discussion Forum :

• Mailing List :

• Platforms : Linux

• License : GNU GPL

• Author : rwpenney

• Contact Email : rwpenney@users.sourceforge.net

22 Awesome Themes for Ubuntu Linux

Istarted using Ubuntu 4 months back, and since then I’ve been looking for ways to customize and tweak it to make Ubuntu more productive and look good. During my search, I came across many cool themes from various sources I’d like to share with you all.



These themes are all available for free download from Gnome Art. Do try them out and let me know if you like them. If you have more cool Ubuntu themes, let me know below in the comments. one more post 60 ubuntu themes, checkout this also
I love eye candy!

Hardy Theme 2.0

Download

Bamboo Zen

Download

Lux Theme

Download

Burnt Orange Ice

Download

Creamy

Download

Glow

Download

Moomex

Download

Roy (Windows Royale)

Download

Clearlooks Metallico

Download

Aqua Dreams

Download

Linux Mint

Download

Real Minimal

Download

Root Green

Download

Light Coffee

Download

Slickness Black

Download

Murrina Aero

Download

Tigris

Download

Sofice

Download

Blue Joy

Download

Gaia Nova

Download

Elegant Brit

Download

Darker Ice Murrina

Download