How to remove Trojan:Win32/Leonem

What is Trojan:Win32/Leonem

Trojan:Win32/Leonem is a sophisticated spyware variant that primarily targets sensitive login data on compromised systems. This malware is typically spread through malicious documents or disguised as legitimate software, making it a deceptive threat. Once installed, it can perform keylogging, collect browser passwords, cookies, and cache, and even seek out stored credentials in email clients. Leonem also attempts to disable security software, modify system settings, and ensure persistence by running at each system boot. Beyond its primary data-stealing function, it can also act as a malware dropper, often deploying ransomware or backdoors. The malware uses legitimate processes to detect sandbox environments and virtual machines, which helps it evade detection. Ultimately, Leonem exfiltrates collected data to its command server, often using Discord webhooks for this purpose.

How Trojan:Win32/Leonem infected your system

Trojan:Win32/Leonem primarily infects computers through malicious email attachments and software downloads from untrustworthy sources. Typically, the malware is embedded in seemingly legitimate documents or applications, which, once opened or executed, initiate the infection process. After infiltrating the system, Leonem attempts to disable security software, such as Microsoft Defender, to avoid detection and removal. It then modifies system settings to ensure it runs every time the operating system boots, establishing persistence. This Trojan often serves as a dropper, downloading additional malicious components like ransomware or backdoors, further compromising the system. Through these methods, Leonem effectively spreads and secures its foothold within the infected environment.

1. Download Trojan:Win32/Leonem Removal Tool
2. Use Windows Malicious Software Removal Tool to remove Trojan:Win32/Leonem
3. Use Autoruns to remove Trojan:Win32/Leonem
4. Files, folders and registry keys of Trojan:Win32/Leonem
5. Other aliases of Trojan:Win32/Leonem
6. How to protect from threats, like Trojan:Win32/Leonem

Remove Trojan:Win32/Leonem manually

Manual removal of Trojan:Win32/Leonem by inexperienced users may become a difficult task because it does not create entries in Add/Remove Programs under Control Panel, does not install browser extensions, and uses random file names. However, there are pre-installed instruments in the Windows system, that allow you to detect and remove malware without using third-party applications. One of them is Windows Malicious Software Removal Tool. It comes with Windows Update in Windows 11, 10, 8. 8.1. For older operating system you can download it here: 64-bit version | 32-bit version.

Remove Trojan:Win32/Leonem using Windows Malicious Software Removal Tool

1. Type mrt in the search box near Start Menu.
2. Run mrt clicking on found item.
3. Click Next button.
4. Choose one of the scan modes Quick scan, Full scan, Customize scan (Full scan recommended).
5. Click Next button.
6. Click on View detailed results of the scan link to view the scan details.
7. Click Finish button.

Remove Trojan:Win32/Leonem using Autoruns

Trojan:Win32/Leonem often sets up to run at Windows startup as an Autorun entry or Scheduled task.

1. Download Autoruns using this link.
2. Extract the archive and run Autoruns.exe file.
3. In Options menu make sure there are checkboxes near Hide Empty Locations, Hide Microsoft Entries, and Hide Windows Entries.
4. Search for suspicious entries with weird names or running from locations like: C:\{username}\AppData\Roaming.
5. Right-click on suspicious entry and choose Delete. This will prevent the threat to run at startup.
6. Switch to Scheduled Tasks tab and do the same.
7. To remove files themselves, click on suspicious entries and choose Jump to Entry…. Remove files or registry keys found.

Remove files, folder and registry keys of Trojan:Win32/Leonem

Trojan:Win32/Leonem files and folders


{randomname}.exe


Trojan:Win32/Leonem registry keys


no information


Aliases of Trojan:Win32/Leonem

How to protect from threats, like Trojan:Win32/Leonem, in future

Standard Windows protection or any decent third-party antivirus (Norton, Avast, Kaspersky) should be able to detect and remove Trojan:Win32/Leonem. However, if you got infected with Trojan:Win32/Leonem with existing and updated security software, you may consider changing it. To feel safe and protect your PC from Trojan:Win32/Leonem on all levels (browser, e-mail attachments, Word or Excel scripts, file system) we recommend a leading provider of internet security solutions – BitDefender. Its solutions both for home and business users proved to be one of the most advanced and effective. Choose and get your BitDefender protection via the button below:

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