Close Up with Stuxnet

Some Information about Stuxnet

Security experts said Stuxnet is cyber weapons, which was created as a tool of terrorism

in cyberspace, which until now still not known who was behind the attack Stuxnet. There are rumors, saying that the virus is designed to attack large industrial systems, and nuclear sites in Iran is one of the objectives of this virus attacks. If the rumor is true, then it is possibility that a virus has been created with an intervention by a country or institutions that have substantial funds which has the intended  to infiltrate another country’s national security system.

How to Stuxnet can infected a computer ?
- This virus spreads via USB thumb drive storage device that has been infected, by exploiting vulnerabilities in Microsoft Windows operating system.
- This virus will spread in share network that has a acces level full.

How about widespread Stuxnet ?
From the research that has been done by a computer security firm Symantec, shows that countries affected by this virus attack on August 6 is, Iran with a number of computers infected 62.867 computers, Indonesia 13.336 computers, India’s computer 6.552, the United States 2.913 computer, Australia  2.436 computers, England 1.038 computers, Malaysia 1.013 computers , and Pakistan 993 computers.

Who was first identified this virus attack ?
Belarus Companies Virusblokada is the first was identified this virus in mid-June.

How much harm could be caused by this virus?
These viruses will steal the victim’s computer information, it was reported that when a virus attacks the SCADA system, the virus can take over the machine control system. In a modified variant of this virus were reported, in the Vista operating system will causes the hard disk becomes full.

Therefore some information about Stuxnet. In the next article I will try to write how to prevent and eliminate this virus from your computer.

How to know your computer has been attacked by Virus

All computer users wouldn’t like if there is a virus infecting your computer. Computer viruses are usually quiet and move from one computer to another.
Viruses move or attack computers in various ways, for example, by email, USB storage devices, Internet and networking on the local computer.
For that as one of the precautions to prevent computer virus infects your computer, you must know what the signs or indicators if the virus has invaded your computer.

Here are the signs that usually occur when viruses attack your computer:
-          You will feel your computer runs slower than usual.
-          Computer suddenly stopped or not responding, and often occurs.
-          Computer suddenly restart or crash, and this happened within a few minutes.
-          Computer suddenly restart and can not run normally again.
-          Computer applications can not run normally.
-          Hard drive or disk drive can not be accessed.
-          Printing activity does not work correctly.
-          Often appears strange and unusual error message.
-          Frequently appear damage dialog box.
-          Function ctrl alt del on microsoft windows has been disable.
-          Same as the previous on command Regedit and MSConfig can not be done.
-          Original folders on your computer has been hidden and replaced with virus files.
-          On Tools Menu, folder options in windows explorer has been missing.
-          Appears files with folder icon but it’s has type file exe.

The things above are common symptoms that occur when a computer infected by computer viruses, but could have some of the above happened because of interference on your computer hardware or software. It is recommended to prevent virus attacks to the computer, you should always make your data definition AntiVirus keep to up-date and do not forget to make backups regularly all your important data.

Why Data Recovery is so important

Why Data Recovery is so important

As you know now we are living in the a world of technology with almost every job are being performed by computers. It can you imagine what if when you are working in the deadline project suddenly your computer system displays a blank screen?  “The data which appears to be lost and inaccessible, don’t panic actually your data is not will lost forever. The lost data can be recovered with data recovery software and services.”

Data Recovery is defined as a scientific approach followed to get back the lost and inaccessible data. This can be made possible through data recovery software utilities and services.

1. Data Recovery software effectively recovers and repair files, databases, storage media, corrupt partitions and brings back your data safely. The recovery software are helpful and effectively recovers back your lost, deleted data, which can be easily purchased through on-line sale transactions.

2. Data Recovery Services are usually performed when the software to recover data is unable to recover your data or the complexity of the damage to data is to such an extent that specialized attention of the data recovery technician is required. This generally happens in cases when your hard drive or storage media indicates the following symptoms:

- Clicking noise from the hard disk drive

- Drive not recognized by the BIOS

- Fire and water damage

- Hard disk component failure

- Computer is not bootable and many other undefined reasons.

The specialist data recovery service providers offer services to recover data from hard disks of desktops and laptops, RAIDs, Tape media, Pen drives, Zip drives, Compact disks, DVDs, Digital Cards, Memory Cards etc where data gets lost due to Logical and Physical crashes.

Data recovery services are the most efficient and economical way to recover your data and files. If you choose for data recovery services you can be assured that you will get back your data.

Some steps to make your computer safe from Viruses

Some steps to make your computer safe from Viruses

As you all has know computer today have become a central to our lives. But unfortunately computer are also has vulnerable to attack from a variety of sources, with viruses being one of the most malicious and troublesome. Even though  the virus written with simply code, but must still vigilant  because the virus has probability to make damage the files on your computer, or it may act as a way for a hacker to access your personal data on your computer.

Clearly, if you want to keep your computer and the information safe from these kinds or threat, you’ll must take steps to keep your computer safe from viruses. This means getting security and utilities software, such as an antivirus program, firewall etc.
here below is some simple steps to make your computer safe form virus :

1. Understand viruses. One saving grace of viruses is that, like the programs you install on your computer, they generally can’t do anything until they are run by you. Unfortunately, some of the more clever viruses are designed to trick the user into running them without realizing that is a threat exists. For example, in the earlier days of email, it was fairly common for people’s email programs to automatically save and run attachments in emails; if that attachment was a virus, then that virus was basically allowed to infect the user’s computer as soon as they checked their email.
Sometimes a virus may be hidden inside another program that appears entirely benign. In this case, it’s important to have antivirus software that can spot the hidden threat and neutralize it before it does any damage.
2. Get yourself high-quality virus protection software. Without any antivirus software, the user is saddled with the responsibility for detecting viruses and preventing them from damaging their computer. Even the most savvy computer user would find this a time-consuming and formidable task. (It may not be able to undo everything, particularly if files were deleted or if the virus transmitted personal information to identity thieves or other malicious characters.)
3. Keep your antivirus software up to date. Although the latest antivirus software can protect your computer from an enormous inventory of existing viruses, it won’t necessarily be able to safeguard your computer from any new viruses that are developed. For this reason, companies that produce antivirus software often include a one-year subscription to keep your antivirus up-to-date so that it can recognize any new viruses that may manifest.

Some Advantages of Microsoft Windows 7

Some Advantages of Microsoft Windows 7

Some of us may already use (OS) from Microsoft’s latest operating system, but carefully Have we realized this one was different OS versions of Microsoft’s previous output. Failure of Microsoft in Vista seems to be a lesson for the latest output is not experiencing similar things and more successful than the record of spectacular success of Windows XP.
Let us dismantle surplus from the previous version of  Microsoft Windows 7

Microsoft has claimed that Windows is an operating system that is designed to suit the tastes of users who want a computer that is simple and convenient, but can work with a fast, lightweight, no fuss, a little click, easy to use and not complicated.
Comparison of Windows XP, Vista and Windows 7

Here are the benefits of Windows 7 which is claimed by new boss Bill Gates, Microsoft’s successor, Steve Ballmer:

1. Finding files fast
To find the file is not too difficult and time consuming. Do I just click on the Start menu and type in the search box what will be searched. Once open, select what you want and quickly be realized.

2. Seeing all the windows with ease
At a time when many windows open, sometimes we confused the name or contents. Windows 7 to help you see him easily with just a peek of the taskbar. The trick with flying-Lift cursor over an icon from an open window will appear the name of the icon and the program.

3. Secretly peeked your desktop
Many times we have to close the window one by one to see the desktop. This feature helps you peek Peek Aero desktop without touching the window. How to cast your cursor over a square box on the bottom right corner. Click above to minimize all open windows. When the desktop screen opens, click Nagi to show again.

4. Finding what you want very easily
Jump List in Windows 7 helps you search for files, songs, pictures, or other documents in the desktop quickly. This reduces the wasted time you find a document that operated yesterday. This feature is no start menu and taskbar. With 1 click, you can view websites that are often used in Internet Explorer 8. You can attract and remove a file from the Jump List.

5. Compare 2 windows
Snap Feature to help us look back at the window with better and easier to compare two documents to each other. How to draw a window to one side of the screen. When the mouse pointer to the other side, the window will snap half of the screen. To extend it vertically, drag the border to the edge of the screen. When the mouse pointer on the edge, the window will snap to the vertical penuh.Satu Click D

6. One Click Can All
With the pin feature, you can access the taskbar with one click. Hover the cursor over your favorite program and drag it to the taskbar. Or right click on it and select “pin” in the Taskbar. Your program will be a pin. To open, click on the Taskbar icon. You can open the pin with another program at the time.

7. Set-up Wireless Easy
With Windows 7 wireless set-up much easier. You can add others, including network printers and digital media players. You do this by launching the wizard “Add a Device” and then type the pin location on mobile devices.

8. Surf the Internet with Fast, Safe and Easy
Internet Explorer 8 makes use of the Internet so more quickly, safely and easily. Through the web slices, you can keep track of specific information. It’s easier to follow than an auction on eBay or the latest news from ESPN. With instant contact search on the internet explorer, the results can be followed in real time. The search results are also equipped with the SmartScreen, the filter that protects you from spam, viruses and other. While InPrivate help you explore the virtual world of privacy after closing the browser.

9. Personalise Your Computer
With Windows 7, you’re not too hard to make the computer more personal. You do this by right click on desktop then click personalize to choose from many themes of interest or turn the desktop back into the slide show your favorite photos. Click on Gadgets to add information that is often needed on the desktop.

Virus Stuxnet will Replace Conficker position

Virus Stuxnet will Replace Conficker  position

Virus Stuxnet a dangerous virus turned out to have the potential to replace Conficker, because there are more dangerous than Conficker Stuxnet.

“Virus Stuxnet actually has emerged since some time ago and the newly emerging again in recent days,” said Regional Manager of Symantec’s Consumer Product Marketing Asia Pacific David Hall.

“Nevertheless,” Hall added, “Stuxnet could replace Conficker because it is much more dangerous.”

if  we see from the dangerous level of the virus, virus Stuxnet  have possibility to replace Conficker  who has make horrendous many computer users in a few years ago.

“However, today the computer users need not worry because many antivirus companies,  has try to always make update they technology so that the antivirus can be overcome Stuxnet virus. That’s  included Norton Internet Security 2011, that had just launched,” Hall said.

As reported earlier, Stuxnet has be suspected to sabotage the cripple nuclear industris systems that exist in Iran. This is after 60 percent Stuxnet successful attack computer systems in the state, Symantec predicted 18 percent of computers in Indonesia have been infected Stuxnet.

Currently, malware is predicted to have infected approximately 45,000 computers in the worldwide. Siemens AG, a company that designs systems to target the virus, said if Stuxnet has infected 15 power plant control systems, including water filtration systems, oil drilling, electricity and nuclear power.

Tips to buy notebooks for Dummies

Tips to buy notebooks for Dummies

Here are some things that you need to consider if you want to buy notebook.
1. Specify price range limit
According to the financial consultant you should buy your notebook based on need rather than desire nor prestige.
2. What applications are often you used:
- If you buy a notebook that will more often to used run applications such as Microsoft Office, browsing the Internet and are sometimes you used for imaging processing using Photoshop, its recommended you to simply buy a notebook with Intel Celeron-class processor or AMD Sempron only. You do not need to buy a notebook with Centrino processors there are more expensive. Celeron or Sempron processor class is quite capable for running Photoshop, Corel Draw, even QuarkExpress applications. If you want to increase their performance, you just need to add memory or RAM from 512 MB to 1GB.
- For those of you who often make a computer programming, heavy graphic design, it is recommended to use upper-class processors like Core 2, AMD Turion.  Centrino or a Core Solo.
3. How your mobile
- If you are frequently mobile, it is recommended that you choose a small and lightweight notebook. Average notebook weighs around 2.3 to 2.5 kg.
4. Screen
- Just choose to suit for your needs, usually a small notebook with a small layer tends to be more expensive price, a small notebook with a layer suitable for people who are mobile but a little less comfortable for people who use the notebook for typing work continuously.

Stuxnet / Winsta, virus that makes your space hard-disk low

Stuxnet – Winsta, Malware virus that makes your Low Disk Space

For those of you who use internet, you should be careful if you try to visit a website address which is indicated as have pornographic content, or for you who always visiting cracking site for download software crack, because without you realize when you try to use the crack code,  it will be could cause turned out the file that actually contains a trojan script “Stuxnet or Winsta“.

If you’ve already run the file, the “Stuxnet” will managed to infect a computer, and will make some files as follows:
-    C: \ WINDOWS \ system32 \ winsta.exe
-    C: \ WINDOWS \ system32 \ drivers \ mrxcls.sys
-    C: \ WINDOWS \ system32 \ drivers \ mrxnet.sys

File “winsta.exe” made will swell for the rest of the existing hard disk space, it will be causing the hard drive becomes full (usually the C drive or system of the OS).  While the file is a file mrxnet.sys and  mrxcls.sys actively used to infect other computers and devices that are connected ( like USB flash or removable drive ).

Actually Winssta.exe is the original files of Windows that is useful for WinStation Monitor, which is one of the tools from Microsoft that is used in Windows 2000 to monitor Terminal Services client session. Location of these files should also be located at C: \ ProgramFiles \ Resources \ winsta.exe. For further information on the following article you can see at http://support.microsoft.com/kb/320190

Some of the symptoms and effects that occur if you are infected with a trojan “Stuxnet” is as follows:

- Hard-disk computers in the network suddenly fully and your will get a warning “Low Disk Space”. Winsta.exe will growing and make adjust the remaining disk space you have (the C drive or system OS).

- The notification from windows system which informs that the rest of your disk space is empty will appears.

- Because of your disk space is empty, so you can not store data again or you can run certain programs that require hard drive space / use the cache.

- The computer will seem to hang or slow, if you are connected to network, you will be disconnected from the network, because some windows system files that become victims of infections are:

1. Svchost: files relating to network connections, with this file to infect the network will be disconnected.
2. Lsass: making slow and the computer hangs and restarts itself, this was done by infecting files.
3. Spoolsv: can not print data via a printer, this is done with this file to infect.

Trojan Virus “Stuxnet” It spreads by exploiting usb storage or full access network. Trojan infected computer will do automatically, because by creating execution files which name,
~ WTR [random_numbers]. Tmp
The steps that must be done to make cleaning a virus is as follows:

-          Clean the virus removal tools using Dr.Web CureIt. You can download the following link:
http://www.freedrweb.com/download+cureit/

-          Fix the windows registry is already in the modification of the virus with the following steps:

Copy this script to use WordPad or Notepad :

[Version]
Signature=”$Chicago$”
Provider=Project-880.com
[DefaultInstall]
AddReg=UnhookRegKey
DelReg=del
[UnhookRegKey]
HKCU, Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced, ShowSuperHidden,0×00010001,1
HKCU, Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced, SuperHidden,0×00010001,1
HKCU, Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced, HideFileExt,0×00010001,0
HKLM, SOFTWARE\CLASSES\batfile\shell\open\command,,,”"”%1″” %*”
HKLM, SOFTWARE\CLASSES\comfile\shell\open\command,,,”"”%1″” %*”
HKLM, SOFTWARE\CLASSES\exefile\shell\open\command,,,”"”%1″” %*”
HKLM, SOFTWARE\CLASSES\piffile\shell\open\command,,,”"”%1″” %*”
HKLM, SOFTWARE\CLASSES\regfile\shell\open\command,,,”regedit.exe “%1″”
HKLM, SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon, Shell,0, “Explorer.exe”
[del]
HKLM, SYSTEM\CurrentControlSet\Services\MRxCls
HKLM, SYSTEM\CurrentControlSet\Services\MRxNet
HKLM, SYSTEM\ControlSet001\Services\MRxCls
HKLM, SYSTEM\ControlSet002\Services\MRxNet
HKLM, SYSTEM\CurrentControlSet\Services\Enum\Root\LEGACY_MRXClS
HKLM, SYSTEM\CurrentControlSet\Services\Enum\Root\LEGACY_MRXNET
HKLM, SYSTEM\ControlSet001\Services\Enum\Root\LEGACY_MRXClS
HKLM, SYSTEM\ControlSet002\Services\Enum\Root\LEGACY_MRXNET

Save the file with the name “repair.inf”. Use the Save as type option to Text Document in order to avoid mistakes. Right-click the file “repair.inf” then select “Install”, then restart your computer. Clean temporary files, this in order to prevent the rest of the trojan is trying to become active again. Use tools like “ATF Cleaner” or use the windows feature is “Disk Clean-Up.”

Next step use the following script to prevent the virus infected your computer again :

@echo off
del /f c:\windows\system32\winsta.exe
rem rd c:\windows\system32\winsta.exe
md c:\windows\system32\winsta.exe
del /f c:\windows\system32\drivers\mrxnet.sys
rem rd c:\windows\system32\drivers\mrxnet.sys
md c:\windows\system32\drivers\mrxnet.sys
del /f c:\windows\system32\drivers\mrxcls.sys
rem rd c:\windows\system32\drivers\mrxcls.sys
md c:\windows\system32\drivers\mrxcls.sys
attrib +r +h +s c:\windows\system32\winsta.exe
attrib +r +h +s c:\windows\system32\drivers\mrxnet.sys
attrib +r +h +s c:\windows\system32\drivers\mrxnet.sys

Save the file with the name “winsta.bat”. Use the Save as type option to Text Document in order to avoid mistakes. then run the file by double clicking on it.

– reference : vaksin.com

About the stand-by and hibernate computers

Do you know when the computer is in a state of death, computer is still consuming electricity.

For stand-by mode consuming less than 5W power, while for hibernating around 3W. And the computer in the dead also require electrical power more or less the same (unless the cable is revoked). The advantages of stand-by or hibernate is that, when turned on the computer again, the computer will be exactly the same state as when last we left off. So if you’re opening your Microsoft word document or your application program winamp while still in a position to run, when you restart the computer it will remain open as the last in a state we live.

1. Stand By mode means that the computer is in “suspended animation”. Stand by mode can be divided into two namely:
a. S1 (computer off but the fan still running) and
b. S3 (Computers are really in circumstances such as death).
Setting S1 and S3 can be done via the BIOS. weakness  of  stand by mode is, a state of computer will be stored in RAM, so if during the stand-by mode power of the computer is lost (eg, dead lights), then the computer will die in a state without being shut down, and jobs that we still leave will also be closed as if the computer is turned off.

2. Hibernate mode, is similar to Stand By, or as in the position of the status of S3. The difference is if the power supply is in interrupted, the last settings will be remain stored on your computer. So all the jobs that has leave behind, will still remains in the final state. The consequence this mode is, we must provide a parts of hard disk space with size similar with size of installed RAM to store the state of the last computer.

Here there is a way of setting up stand-by / hibernate the computer automatically, if the computer is idle, the computer will automatically become a standby / hibernate,
1. Right click on your desktop
2. Select the Properties tab
3. Select the screen saver then click Power options
4. Please select an option according to which there is desire.
- Turn off the monitor after … minutes
- Turn off hard disk after … minutes
- Stand by after … minutes
- Hibernate after … minutes <<<only if hibernation is enabled. There is next to the tab for this setting. But remember hibernate requires hard disk space RAM size that we install>>>

if you want to try do with manual way, click turn off computer / Alt F4/. If you want the computer to hibernate, press shift key and the stand-by, but remember you must activate the hibernate settings first.

Internal factors that cause the computer to be slow

1. Many of the applications installed
If you want to install some software on your computer firstly that you should be considered is that software must be an important and necessary for you, do not install too much software that is not used. Because this will take space on the computer so the computer will eventually interfere with the work itself. If the unnecessary software already installed, you can delete them with uninstall the application from the Control Panel.

2. A lot of useless files
Perhaps this is often forgotten by many people, may people not aware of garbage files that should be discarded. The definition of junk files are: file in the Recycle Bin, cookies, history of IE, *.bak files, temporary files, etc.
When we delete files that are not used, actually the file is not automatically deleted from your hard drive, the file is actually still stored in the Recycle Bin folder, we still can retrieve the file, if we need it. You must delete the files in the Recycle Bin because of all the files are still taking the hard drive space. Make sure you have selected the files that are already not used, because when we have empty of all files in the Recycle Bin, the files will be deleted permanently and can not be recovered.

Cookies are also junk files that must be cleaned. These files will always appear when you connecting to the internet network. You can delete cookies in Internet Options on each browser (IE, Mozilla, Netscape, etc). In addition to cookies, history also affect to your computer systems. Store more history make your computer required more memory. History files will automatically appear when connecting to the internet network. Clean the history file on the Tools menu > Internet Options on each browser used.

3. Many applications that are unreadable when Start Up
If we try to install some software usually we see the application often provide choices, namely: that the application icon was added to the desktop or Quick Launch on the Taskbar. We recommend that you do not need put icon  program in the taskbar because it can be make your operating system will run slowly when you Start Up system oprating. It will take a long time to activate these programs. Indeed on the face will be easier to run these programs because living clicking on its icon in the taskbar, but actually become a burden because the computer system must provide its own memory. It will slow down computer performance. Arrange a few applications that really needed a way to change. Run from the Start menu and then select Run, type msconfig. Turn off unnecessary applications when Start Up.

4. Management System for Irregular
Computers that are often we used also need a refresher, one of way to doing this is  Scandisk and Defragment on a regular basis at least once a month. Ideally once a week, depending on the frequency of computer you use. Although something trivial, but often forgotten by many people. Run Scandisk on a regular basis to fix hard drive crashes are often caused by a sudden power failure or hang.

5. Select Performance or Appearance
For Windows XP users is recommended to user to doing this so to make your computer work faster. Indeed the appearance of Windows XP is very nice, the icons are displayed with colorful glossy effect. Please note, a nice windows interface requires no small amount of memory. So do not be surprised if that make more and more slow computer performance.

Windows XP provides two options “Adjust for Best Appearance” and “Adjust for Best”. If you choose “Adjust for Best Appearance” then the system will run with more priority to performance so that performance is more computer memory. This is an effect on computer performance. Whereas if you select “Adjust for Best Performance” system will run with more priority than the appearance of computer performance so that the view of Windows XP will appear as usual, without shadow effects or shiny as the previous version of windows.

6. Shutdown process does not match procedure
when we use the computer runs very slowly, then abruptly hangs, usually we are often directly do press the power button to restart computer because of all the keyboard keys can not respond.

Did you know when we often turn off the computer with this way, it can cause the operating system does not run normally and the hard drive was damaged (bad sectors). This will exacerbate the situation because the files exist in the system, can also can not be read again. So remember shutdown your computer with correctly.