A new Win32 infection, taking advantage of the Authrootstl.cab file in Windows has been detected. The virus is believed to be a Trojan horse, most likely a Kelihos Trojan variant and it may perform a set of malicious activities, such as collect account information, log keystrokes and perform a set of other activities on your computer system, like DDoS attacks, monitor the network traffic and even send spam e-mails from the victim’s IP address. If your computer has been infected by the Authrootstl.cab malware, it is strongly recommended to immediately to detect and remove it, preferably by using information like the one stated in this article.
|Short Description||May download other malware on the infected server/computer or may include it in a botnet (zombie network). May also steal information from it.|
|Symptoms||You may see errors with the certificate of the Authrootstl.cab file. Other than that, the malware aims to stay undetected, showing no symptoms of presence.|
|Distribution Method||Spam Emails, Email Attachments, Executable files|
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|User Experience||Join Our Forum to Discuss Authrootstl.cab Trojan.|
Authrootstl.cab Malware – How Did I Get Infected
This Trojan horse is a bit more sophisticated than other malware, since it has a lot of functions, that are pre-programmed to ensure that your computer is at the hacker’s disposal. The infection methods are not so sophisticated, in fact there has been only one that is reported so far and it is via malicious e-mail messages being spammed. The messages are of different character and contain the virus infection file embedded as an e-mail attachment, which poses as a legitimate document. Here is an approximate example of how spam e-mails carrying the Authrootstl.cab malware as an attachment may appear like:
We could not deliver your parcel.
You can review complete details of your order in the file attached.
Sr. Operation Agent.
The usual form of the attachment is an executable file that is archived in a .zip or .rar archive. However, the file may also be a Microsoft Office document, embedded with a malicious macros inside of it. If the file is a fake document, the following activities happen:
Besides an e-mail attachment, the malicious file may also be uploaded on a third-party website and a link to it may be posted in the e-mail. The black hat hackers usually use Google Drive, Dropbox and other online file-sharing services, since they are not blocked by e-mail providing companies.
Authrootstl.cab Malware – Analysis
When an infection with the Authrootstl.cab malware takes place, the virus immediately modifies the Windows Registry Editor by adding registry values in the following locations:
After this has been done, the malware connects to the following web links in order to download the root certificates via the files authrootstl.cab and authrooseq.txt.
This ensures that the Authrootstl.cab malware stays obfuscated and undetected as an administrator of your computer.
When this is done, the malware, associated with Authrootstl.cab, connects to multiple hosts, reported by researchers to be the following:
After connecting to them, the virus uses multiple web resources and Windows functions in order to perform the following activities on the infected computer:
- Encrypt it’s outgoing and incoming communication.
- Receive a list of computers to be attacked by automatically sending spam e-mail messages to them from the infected computer.
- Include the victim computer in a botnet (zombie network) of computers.
- Turn the infected computer or server to serve as a proxy network for the hacker.
- Monitor what you do online.
- Collect the keystrokes typed by you.
In addition to the many activities of this Trojan, it also aims to steal your offline BitCoin wallet, if there is such present on your computer. This is done by scanning for your wallet.dat file, usually located in the %AppData% directory:
Furthermore, it is unknown as of yet why, but the Authrootstl.cab malware also scans for the following files on the infected computer:
→ avi mov wmv mp3 wave wav wma ogg vob png jpg jpeg gif bmp exe dll ocx class msi zip 7z rar jar gz hxw hxh hxn hxd
After doing so, the Authrootstl.cab malware may have the ability to directly copy those files and send them over to the server of the hacker.
Another activity, which this Trojan is created to perform is to send spam e-mails to a large pre-configured list of e-mail addresses. This is done with the one and only purpose to either influence those servers or computers with what is written in the message or infect them with a version of itself via the spam mails. The messages sent are usually related to stock price speculation, but they may become different at any time in the future. Here is one e-mail sent from an infected server with this Trojan:
“Breaking News: Worldwide Market Demand for Gold Might Hit to $221 . 5 Billion this Year. One company made sure to secure their claims for the richest gold
find – worth of billions of the GOLD
The symbol is SR_G__L
Go getting some of SR_G_L on Monday in the low $0.27
Company Name: Source Gold Corp,
Latest Pricmgt $.027
Short Term Target Pace” 80.39
Tap into the Nat Gold Rush Global gold demand could top 4,400 tons in 2012
worth 8221.5 bilion – an increase of16% over 2011. Early-in investors in
this ONE stock up can surely convert ten grands into fifiy. Acqu’ue SR_G_L
on Monday October 8th. call you broker or visit Etrade!”
Remove Authrootstl.cab Malware from Your Computer
To show you how to eliminate Authrootstl.cab malware, we have created removal instructions in the steps below. They can help you isolate the threat and look for all the registries and files it has created on your computer system. However, for fast and effective removal, security professionals often recommend to use an advanced anti-malware program, that is sure to help you remove Authrootstl.cab malware automatically and fully and detect other malware as well, if present on your PC. Furthermore, installing such software also makes sure that your computer stays protected against future infections as well.
- Guide 1: How to Remove Authrootstl.cab Trojan from Windows.
- Guide 2: Get rid of Authrootstl.cab Trojan on Mac OS X.
- Guide 3: Remove Authrootstl.cab Trojan in Google Chrome.
- Guide 4: Erase Authrootstl.cab Trojan from Mozilla Firefox.
- Guide 5: Uninstall Authrootstl.cab Trojan from Microsoft Edge.
- Guide 6: Remove Authrootstl.cab Trojan from Safari.
- Guide 7: Eliminate Authrootstl.cab Trojan from Internet Explorer.
- Guide 8: Disable Authrootstl.cab Trojan Push Notifications in Your Browsers.
How to Remove Authrootstl.cab Trojan from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove Authrootstl.cab Trojan
Step 2: Uninstall Authrootstl.cab Trojan and related software from Windows
Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it.
Step 3: Clean any registries, created by Authrootstl.cab Trojan on your computer.
The usually targeted registries of Windows machines are the following:
You can access them by opening the Windows registry editor and deleting any values, created by Authrootstl.cab Trojan there. This can happen by following the steps underneath:
Get rid of Authrootstl.cab Trojan from Mac OS X.
Step 1: Uninstall Authrootstl.cab Trojan and remove related files and objects
1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:
- Go to Finder.
- In the search bar type the name of the app that you want to remove.
- Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
- If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.
In case you cannot remove Authrootstl.cab Trojan via Step 1 above:
In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:
You can repeat the same procedure with the following other Library directories:
Tip: ~ is there on purpose, because it leads to more LaunchAgents.
Step 2: Scan for and remove Authrootstl.cab Trojan files from your Mac
When you are facing problems on your Mac as a result of unwanted scripts and programs such as Authrootstl.cab Trojan, the recommended way of eliminating the threat is by using an anti-malware program. SpyHunter for Mac offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove Authrootstl.cab Trojan from Google Chrome.
Step 1: Start Google Chrome and open the drop menu
Step 2: Move the cursor over "Tools" and then from the extended menu choose "Extensions"
Step 3: From the opened "Extensions" menu locate the unwanted extension and click on its "Remove" button.
Step 4: After the extension is removed, restart Google Chrome by closing it from the red "X" button at the top right corner and start it again.
Erase Authrootstl.cab Trojan from Mozilla Firefox.
Step 1: Start Mozilla Firefox. Open the menu window
Step 2: Select the "Add-ons" icon from the menu.
Step 3: Select the unwanted extension and click "Remove"
Step 4: After the extension is removed, restart Mozilla Firefox by closing it from the red "X" button at the top right corner and start it again.
Uninstall Authrootstl.cab Trojan from Microsoft Edge.
Step 1: Start Edge browser.
Step 2: Open the drop menu by clicking on the icon at the top right corner.
Step 3: From the drop menu select "Extensions".
Step 4: Choose the suspected malicious extension you want to remove and then click on the gear icon.
Step 5: Remove the malicious extension by scrolling down and then clicking on Uninstall.
Remove Authrootstl.cab Trojan from Safari.
Step 1: Start the Safari app.
Step 2: After hovering your mouse cursor to the top of the screen, click on the Safari text to open its drop down menu.
Step 3: From the menu, click on "Preferences".
Step 4: After that, select the 'Extensions' Tab.
Step 5: Click once on the extension you want to remove.
Step 6: Click 'Uninstall'.
A pop-up window will appear asking for confirmation to uninstall the extension. Select 'Uninstall' again, and the Authrootstl.cab Trojan will be removed.
Eliminate Authrootstl.cab Trojan from Internet Explorer.
Step 1: Start Internet Explorer.
Step 2: Click on the gear icon labeled 'Tools' to open the drop menu and select 'Manage Add-ons'
Step 3: In the 'Manage Add-ons' window.
Step 4: Select the extension you want to remove and then click 'Disable'. A pop-up window will appear to inform you that you are about to disable the selected extension, and some more add-ons might be disabled as well. Leave all the boxes checked, and click 'Disable'.
Step 5: After the unwanted extension has been removed, restart Internet Explorer by closing it from the red 'X' button located at the top right corner and start it again.
Remove Push Notifications caused by Authrootstl.cab Trojan from Your Browsers.
Turn Off Push Notifications from Google Chrome
To disable any Push Notices from Google Chrome browser, please follow the steps below:
Step 1: Go to Settings in Chrome.
Step 2: In Settings, select “Advanced Settings”:
Step 3: Click “Content Settings”:
Step 4: Open “Notifications”:
Step 5: Click the three dots and choose Block, Edit or Remove options:
Remove Push Notifications on Firefox
Step 1: Go to Firefox Options.
Step 2: Go to “Settings”, type “notifications” in the search bar and click "Settings":
Step 3: Click “Remove” on any site you wish notifications gone and click “Save Changes”
Stop Push Notifications on Opera
Step 1: In Opera, press ALT+P to go to Settings
Step 2: In Setting search, type “Content” to go to Content Settings.
Step 3: Open Notifications:
Step 4: Do the same as you did with Google Chrome (explained below):
Eliminate Push Notifications on Safari
Step 1: Open Safari Preferences.
Step 2: Choose the domain from where you like push pop-ups gone and change to "Deny" from "Allow".