Another malvertising campaign has been detected, redirecting users to the HanJuan exploit kit (EK) also known as Timba Trojan and Fobber. An advertising service – Ad.fly has been compromised and exploited to link users to a piece of malicious software designed to harvest login details. The attack itself may be considered a man-in-the-middle one since the user’s browser is disposed to seize various credentials. Ad.fly is a URL shortener that displays an ad before the user reaches the final content via the shortened link.
URL shortening services are often employed by cyber criminals to masquerade malicious links. However, the present malvertising campaign is designed to exploit not the short link but an embedded advertisement within the Ad.fly service. Hence, the malicious advertising happens and the user is redirected to the exploit kit.
The HanJuan EK Malvertising Campaign Description
As just mentioned, the attack begins with the exploitation of the Ad.fly service. Basically, the shortener uses interstitial advertising. Interstitials are web pages that are shown to the user before or after he reaches the desired content. Usually, interstitials are controlled by an ad server.
Login Details Theft
As with most malicious campaigns of the scale, the final goal is the stealing of sensitive information.
Another version of the Tinba Trojan
According to the Dutch security company Fox-IT, the threat is yet another variant of the Tinba banking Trojan also known as Tiny Banker and Trojan.Tinba.B. Tinba was detected by Symantec back in September 2014. Its threat level was considered low, its primary purpose being the theft of banking credentials.
Another malicious campaign associated with HanJuan EK was detected in March this year. Any user who had visited the New York Daily website, Metacafe and several other less popular ones, could have been compromised by a malvertising campaign redirecting to the HanJuan EK. An Adobe Flash Player vulnerability was similarly exploited.
HanJuan Exploit Kit Detection and Removal
To stay protected against exploit kits, users can follow some security tips such as:
- Frequently update Java, Adobe products, and Flash.
- Turn off Java and Flash when not needed.
- Implement a routine patching program.
- Sustain a powerful anti-malware solution.
The following security tip goes to business owners:
- Eliminate or restrict admin-level rights for non-expert employees.
To make sure the computer hasn’t been affected by the HanJuan EK, performing a full system scan is recommended. Several removal steps that apply to information stealing Trojans are also provided.
Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter
- Guide 1: How to Remove HanJuan Exploit Kit from Windows.
- Guide 2: Get rid of HanJuan Exploit Kit from Mac OS X.
- Guide 3: Remove HanJuan Exploit Kit from Google Chrome.
- Guide 4: Erase HanJuan Exploit Kit from Mozilla Firefox.
- Guide 5: Uninstall HanJuan Exploit Kit from Microsoft Edge.
- Guide 6: Remove HanJuan Exploit Kit from Safari.
- Guide 7: Eliminate HanJuan Exploit Kit from Internet Explorer.
How to Remove HanJuan Exploit Kit from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove HanJuan Exploit Kit
Step 2: Uninstall HanJuan Exploit Kit 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 HanJuan Exploit Kit 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 HanJuan Exploit Kit there. This can happen by following the steps underneath:
Get rid of HanJuan Exploit Kit from Mac OS X.
Step 1: Uninstall HanJuan Exploit Kit 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 HanJuan Exploit Kit 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 malware from your Mac
When you are facing problems on your Mac as a result of unwanted scripts, programs and malware, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.
Remove HanJuan Exploit Kit 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 HanJuan Exploit Kit 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 HanJuan Exploit Kit 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 HanJuan Exploit Kit 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 HanJuan Exploit Kit will be removed.
Eliminate HanJuan Exploit Kit 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.