A Trojan which uses false Facebook messages to expose user data and account credentials has appeared, dubbed Zusy by ESG malware researchers. The Trojan has recently seen a rise in popularity, and it is widespread via spam pessages on Facebook. As soon as it penetrates the computer, Zusy may take advantage of the infected machine in a malicious way to spread further on other Facebook accounts. Users who have seen spam messages with file names like, for example, “IMG_DSC1242” sent to them via Facebook chat along with a chat message, like “ahaha” should not open the photo before checking it for malware. In case you believe your computer has been infected with the Zusy threat, we advise you to take advantage of the instructions in this article and permanently delete Zusy Facebook Trojan from your computer.
Threat Summary
| Name | Zusy Facebook Trojan |
| Type | Trojan / Infostealer |
| Short Description | Steals Facebook credentials and replicates via spam messages from the infected PC. |
| Symptoms | The virus uses a spam message along with a malicious .ZIP file attached in which there is the same file under a .JAR extension. |
| Distribution Method | Via malicious attachments sent in Facebook. |
| Detection Tool |
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| User Experience | Join our forum to discuss Zusy Trojan. |
Zusy Facebook Trojan – How Did I Get It
Facebook malware has seen as a rapidly growing threat by malware researchers. The virus has also been reported to cause massive infections on user systems via infected computers. Such infected computers may get an executable file slipped onto their computer via a malicious .ZIP file pretending to be an archive of an image or several images. In it, malware researchers report discovering a .jar partial file, and as soon as this file is opened, it activates a malicious script. This malicious script then connects to the cyber-criminals’ malicious server and downloads Zusy Facebook Trojan onto it.
Zusy Facebook Trojan – How Does It Work
Zusy Facebook Trojan is designed to be based on the logic behind Botnet malware – to replicated from an infected system to a victim system automatically. So in case you start to see messages which are sent from your Facebook profile along with file attachments or a web link, you should immediately scan your computer for malware.
Not only this, but Zusy Facebook Trojan may steal information as well. Here is the type of information this Trojan may get to if it has been configured to do it:
- User Credentials.
- Financial Information.
- Personal Information.
- System Information.
As soon as this is done, Zusy may also download other malware on your computer, making it vulnerable from various type of threats, like ransomware – the worst of them.
ESG malware researchers have estimated a 42% rise in infections by this malware from their statistics and databases. This means that users should be aware in case they see .ZIP files with .JAR files embedded in them:
Remove Zusy Facebook Trojan from Your Computer
In case you have become a victim of this Trojan on your computer, we strongly advise you to IMMEDIATELY change your credentials from a safe computer or a smartphone or any other device you can get your hands on. We also strongly advise you to isolate Zusy malware by entering the Safe Mode of your computer to stop it from actively running on it. From there you may manually hunt down Zusy’s malicious files and kill it permanently.
However, you should also be advised that Zusy may download other malware on your computer and modify your Windows Registry editor’s entries. This is why, besides following the instructions below, we also recommend you to download and scan your computer with an advanced anti-malware program to be fully sure that all of Zusy’s files have been detected and removed from your computer.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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Preparation before removing Zusy Facebook Trojan.
Before starting the actual removal process, we recommend that you do the following preparation steps.
- Make sure you have these instructions always open and in front of your eyes.
- Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
- Be patient as this could take a while.
- Scan for Malware
- Fix Registries
- Remove Virus Files
Step 1: Scan for Zusy Facebook Trojan with SpyHunter Anti-Malware Tool
Step 2: Clean any registries, created by Zusy Facebook Trojan on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by Zusy Facebook Trojan there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.Step 3: Find virus files created by Zusy Facebook Trojan on your PC.
1.For Windows 8, 8.1 and 10.
For Newer Windows Operating Systems
1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.
2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.
3: Navigate to the search box in the top-right of your PC's screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be "fileextension:exe". After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:
N.B. We recommend to wait for the green loading bar in the navigation box to fill up in case the PC is looking for the file and hasn't found it yet.
2.For Windows XP, Vista, and 7.
For Older Windows Operating Systems
In older Windows OS's the conventional approach should be the effective one:
1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.
2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.
3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.
Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.
Zusy Facebook Trojan FAQ
What Does Zusy Facebook Trojan Trojan Do?
The Zusy Facebook Trojan Trojan is a malicious computer program designed to disrupt, damage, or gain unauthorized access to a computer system. It can be used to steal sensitive data, gain control over a system, or launch other malicious activities.
Can Trojans Steal Passwords?
Yes, Trojans, like Zusy Facebook Trojan, can steal passwords. These malicious programs are designed to gain access to a user's computer, spy on victims and steal sensitive information such as banking details and passwords.
Can Zusy Facebook Trojan Trojan Hide Itself?
Yes, it can. A Trojan can use various techniques to mask itself, including rootkits, encryption, and obfuscation, to hide from security scanners and evade detection.
Can a Trojan be Removed by Factory Reset?
Yes, a Trojan can be removed by factory resetting your device. This is because it will restore the device to its original state, eliminating any malicious software that may have been installed. Bear in mind that there are more sophisticated Trojans that leave backdoors and reinfect even after a factory reset.
Can Zusy Facebook Trojan Trojan Infect WiFi?
Yes, it is possible for a Trojan to infect WiFi networks. When a user connects to the infected network, the Trojan can spread to other connected devices and can access sensitive information on the network.
Can Trojans Be Deleted?
Yes, Trojans can be deleted. This is typically done by running a powerful anti-virus or anti-malware program that is designed to detect and remove malicious files. In some cases, manual deletion of the Trojan may also be necessary.
Can Trojans Steal Files?
Yes, Trojans can steal files if they are installed on a computer. This is done by allowing the malware author or user to gain access to the computer and then steal the files stored on it.
Which Anti-Malware Can Remove Trojans?
Anti-malware programs such as SpyHunter are capable of scanning for and removing Trojans from your computer. It is important to keep your anti-malware up to date and regularly scan your system for any malicious software.
Can Trojans Infect USB?
Yes, Trojans can infect USB devices. USB Trojans typically spread through malicious files downloaded from the internet or shared via email, allowing the hacker to gain access to a user's confidential data.
About the Zusy Facebook Trojan Research
The content we publish on SensorsTechForum.com, this Zusy Facebook Trojan how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific trojan problem.
How did we conduct the research on Zusy Facebook Trojan?
Please note that our research is based on an independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware definitions, including the various types of trojans (backdoor, downloader, infostealer, ransom, etc.)
Furthermore, the research behind the Zusy Facebook Trojan threat is backed with VirusTotal.
To better understand the threat posed by trojans, please refer to the following articles which provide knowledgeable details.