Celas Trojan

On this page is detailed description of Celas. Ways to remove the threat and methods to protect the computer against similar attack is also presented.

Celas is a Trojan that will function as ransom software. Upon infecting a computer, this computer virus will lock your computer and state that you are using illegal copies of music files. It will demand you to pay a sum of 50 Euro as penalty. The transaction is typically accomplished online. Victims are asked to pay through designated processor. Upon completion, user must send transaction details to an attacker which in return will provide a code to unlock the PC.

Celas will restrict your access to the computer. It will also prevent Windows from starting normally. Then, it decrypts all files in the hard drive causing the infected computer to malfunction. All you have left is the screen for this ransom program, which accuses you of copyright infringement. Here is the message you can see at the top of the screen.

Celas
Access to your computer was denied.
Illegally downloaded music tracks [in other words, “pirated copies”] have been detected at your PC.
While being downloaded the before mentioned tracks were copied – that’s also a criminal offense in conformity with Section 106 of Digital Millennium Copyright Act.

Please bear in mind that this accusation is baseless. However, even if you did not commit any illegal acts such as stated in the warning, your computer is already compromised. Celas Trojan has taken over your computer. Follow the guide on this page to bring back computer to its normal operation.

TypeRansomware
Sub-TypeDesktop Lock
OS AffectedWindows

What are the Symptoms of Celas Trojan Infection?

Celas Trojan will lock the screen and replaces your wallpaper with this ransom page.

Updated: August 21, 2012
Here is a more recent version of the Celas Trojan. There is no much different except for a few changes on the layout. Ultimate Game Card by PaybyCash.com is now incorporated to this new version.

Celas Trojan 2012

Follow these Procedures to Remove Celas

Procedure 1 : Create bootable USB drive via Kaspersky Rescue Disk

Procedure 2 : Start the computer with Kaspersky Rescue Disk

Procedure 3 : Remove Celas with WindowsUnlocker

Procedure 4 : Run a virus scan using the same tool to ensure that no more leftover items from Celas

Ransom Trojans and viruses will lock the screen and makes the computer unusable. Common ways to deal with this type of infection is to boot the PC using another device. For this tutorial we will do a bootable disk that contains Celas remover.

Create a USB Bootable Device

1. Download Kaspersky Rescue Disk from their official server. Click the button below. The file will be in .ISO format.

2. Download this utility called rescue2usb to record your .ISO file into the USB drive. Obviously you need a USB thumb drive at least 512MB in capacity. Plug it to the computer.

3. Once you have the two programs, double-click on the rescue2usb.exe to start creating a bootable USB drive.
4. You will see on the screen in the program called Kasperksy USB Rescue Disk Maker. Click on Browse and locate the .ISO file.
5. Under USB Medium, select the proper drive of your USB device.
6. Click on START. It will now begin to create a bootable USB drive with Kaspersky Rescue Disk in it.

Start the Computer with Kaspersky Rescue Disk.

1. You must set the computer to use other bootable device aside from hard drive. For this procedure, enable your BIOS to boot to USB device. If you are not familiar with this, please refer to your computer's instruction manual.

2. Another option is to access the Boot Menu right after you turn one the PC. It will present a Menu so that you can select a preferred boot drive. Select Removable Devices.

Boot Menu

3. Your computer will now start and load Kaspersky Rescue Disk.
4. If you see a message on the screen, please Press any key to enter the menu. You only have 10 seconds to do this, otherwise it will boot with the hard drive.

5. Next screen will be the interface language. Please select desired language to use.
6. You must run the program in Graphic Mode. This gives you easy access to all commands and menus.
7. End User License Agreement will appear. Please accept to continue using the program. Press 1 to proceed.

Using WindowsUnlocker to Remove Celas

1.Click on the K button at the lower left corner of the screen.

2. Select Terminal on the list. It will open a command prompt.
3. Type windowsunlocker and press Enter on your keyboard.

4. On WindowsUnlocker menu, please type 1 to Unlock Windows. This utility will clean the registry for malicious entries.

5. After the cleanup process, it will display the menu once more.
6. Press 0 on your keyboard to exit WindowsUnlocker.

Run a Virus Scan

1. After removing Celas, you need to delete all remaining components.
2. Click on the K to display the menu.

3. Select Kaspersky Rescue Disk. This will open the virus scanning tool.
4. You need to update the program first. Select My Update Center tab and click on Start update. This requires an Internet connection.

5. After updating the program, select Object Scan tab and click on Start Object Scan. You must scan the following:

  • Disk boot sectors
  • Hidden startup objects
  • All drives

6. Scanning the entire hard drive may take some time. Please let the scan to finish.
7. Once the scan process is complete, the tool will prompt you for preferred actions on detected threats. Deleting all threats is recommended.
8. You can now turn off the computer, unplug the USB drive, and start Windows in normal mode.

Protect your PC from Celas or Similar Attack

Turn On Security Features of your Internet Browser

Internet Explorer - Activate SmartScreen Filter

Internet Explorer versions 8 and 9 has this feature called SmartScreen Filter. It helps detect phishing web sites and protect you from downloading malicious files online. You may have avoided Celas virus if this has been active on your PC. To turn on SmartScreen Filter, follow these steps:

1. Please open Internet Explorer.
2. On top menu, select Tools (IE 9). For IE 8, please look for Safety menu.
3. Select SmartScreen Filter from the drop-down list and click on Turn on SmartScreen Filter.

IE SmartScreen Filter

4. Please restart Internet Explorer.

Google Chrome's Enable Phishing and Malware Protection

With Google Chrome's Phishing and Malware Detection feature, you will have lesser risks browsing the web. It will display a warning when the site you are trying to visit is suspicious. To enable Phishing and Malware Protection, please do these steps:

1. Open Google Chrome.
2. Click on the Customize and control Google Chrome (3-Bars Icon) located on top right corner of the browser.
3. Select Settings from the drop-down list.
4. Once on the settings page, click on Show advanced settings... at the bottom of the page to see the rest of the Chrome setup.
5. Locate Privacy section and mark 'Enable phishing and malware protection'.

Chrome Security Settings

6. Please restart Google Chrome. New settings keep your browser safe while surfing the web.

Mozilla Firefox - Block Attack Sites and Web Forgeries

Phishing and Malware Protection is a built-in feature on Firefox version 3 or later. It warns you when a page you are trying to visit contains phishing content or an attack site designed to drop threats on the computer. To help you keep safe while browsing the Internet using Firefox, please follow this guide:

1. Open Mozilla Firefox browser.
2. On top menu, click on Tools. Then select Options from the list.
3. Select Security and put a check mark on the following items:

  • Warn me when sites try to install add-ons
  • Block reported attack sites
  • Block reported web forgeries

Firefox Security Settings

Remove Celas & Protect Your Computer Now!

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One Response to“Celas Trojan”

  1. Vicius
    July 4, 2012 at 7:11 pm #

    friend this must be done from the same infected computer or another?

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