The Guildma Trojan is a malware threat which is rated as advanced when compared with other viruses of this type. Usually Trojan infections like this one are made by launching automated hacking toolkits or creating infected files. They are often made by taking the legitimate files from their official sources and modifying them with the necessary virus code. Other data can also be affected. All kinds of other data may be used as well — this includes malicious plugins for web browsers and etc. If any are found then the Guildma Trojan will be installed.
This particular threat is known for being spread using a multitude of weaknesses. The attacks are set against users worldwide. After the infection has been made the Guildma Trojan can download other threats, launch multiple dangerous modules and steal files.
|Type||Malware, Trojan, Miner|
|Short Description||A dangerous malware which can launch different components and start a Trojan module.|
|Symptoms||The victims may notice performance issues and can get infected with other malware.|
|Distribution Method||Common distribution tactics and direct web attacks.|
|Detection Tool|| See If Your System Has Been Affected by malware |
Malware Removal Tool
|User Experience||Join Our Forum to Discuss Guildma Trojan.|
Guildma Trojan — Overview
Guildma Trojan is an alternative name for a sample associated with Astaroth, another popular family of threats. It originates from Brazil and includes advanced functionality. Over the years several attacks carrying similar threats have been used by many hacking groups. Almost all of the attacks are carrid out against Brazilian networks. The distinct characteristic of the Trojan is that it is designed to act not so much as an ordinary remote control malware, but as a complex banking Trojan. However unlike most threats of its type it not only targets banks and financial organizations, but also online shops and streaming services.
It is spread mainly by phishing email messages which are sent out to the intended victims by using a SPAM-like strategy. These messages include attached files which are HTML web pages. When they are clicked on the web browsers will launch them. Usually they will contain download scripts that wil be run automatically and will lead to the initial payload delivery of the Guildma Trojan. An alternative is to attach archives which can be password-protected or self extracting. In the case of passwords they can be inserted in the contents of the emails.
The initial payload mechanism will be run via the Windows Explorer system process which means that many security software and services may not detect the infection. This is especially true when other related mechanisms are also used. The newer versions of the Trojan have been found to interact with a browser DLL function that is normally used to export bookmarks by the users. This simulates user interaction and will not raise awareness by the system and any anti-virus programs.
The main module is designed to carry out several malware actions as built into its behavior sequence:
- Security Bypass – The malware will scan the host computer for the presence of any installed security applications and services. If they are found the Trojan may either stop itself from running or attempt to bypass them.
- Information Gathering – Like other complex banking Trojans the Guildma one will create a report containing sensitive information about system. Generally this will include personal information about the users and machine details.
The malware is also programmed to gather email addresses and form data from the installed web browsers and email clients. This can be cross-referenced from other hijacked data in order to reveal banking service credentials. The Trojan functions of the malware contain a lot of capabilities that can be run on the victim systems. In comparison with other threats this version can take screenshots, capture user input (keyboard and mouse movement) and also deliver files from the hacker-controlled servers. The established secure connection allows the remote attackers to also carry out power actions (such as shutting down the computer) and also to retrieve other malware.
Its important to know that at any time the behavior and the installation sequence can change at any time. This is why the Guildma Trojan infections need to be removed as early as possible.
How to Remove Guildma Trojan
In order to fully remove Guildma from your computer system, we recommend that you follow the removal instructions underneath this article. If the first two manual removal steps do not seem to work and you still see Guildma or programs, related to it, we suggest what most security experts advise – to download and run a scan of your computer with a reputable anti-malware program. Downloading this software will not only save you some time, but will remove all of Guildma files and programs related to it and will protect your computer against such intrusive apps and malware in the future.
- Guide 1: How to Remove Guildma Trojan from Windows.
- Guide 2: Get rid of Guildma Trojan from Mac OS X.
- Guide 3: Remove Guildma Trojan from Google Chrome.
- Guide 4: Erase Guildma Trojan from Mozilla Firefox.
- Guide 5: Uninstall Guildma Trojan from Microsoft Edge.
- Guide 6: Remove Guildma Trojan from Safari.
- Guide 7: Eliminate Guildma Trojan from Internet Explorer.
How to Remove Guildma Trojan from Windows.
Step 1: Boot Your PC In Safe Mode to isolate and remove Guildma Trojan
Step 2: Uninstall Guildma 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 Guildma 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 Guildma Trojan there. This can happen by following the steps underneath:
Get rid of Guildma Trojan from Mac OS X.
Step 1: Uninstall Guildma 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 Guildma 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 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 Guildma 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 Guildma 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 Guildma 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 Guildma 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 Guildma Trojan will be removed.
Eliminate Guildma 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.