Lumma Stealer Malware – An Information Stealer’s Threat

Written by Daniel Zimmerman

Lumma Stealer presents a significant threat in the realm of information theft. Operating within the framework of Malware-as-a-Service 1, it is distributed through LummaC on Russian-speaking underground forums and Telegram since at least August 2022. This text examines Lumma’s capabilities, focusing on its proficiency in cryptocurrency wallet theft and file extraction.

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Lumma Stealer exhibits the classic traits of an information stealer written in C. It targets compromised systems and their installed applications, extracting sensitive data. The extent of damage these stealers can inflict varies based on their capabilities, the data accessible on victims’ devices, and the objectives of cyber criminals.

Overview of Lumma Stealer:

NameLumma Stealer
Damage Lumma Stealer’s actions can result in severe privacy violations, significant financial losses, and potential identity theft by extracting sensitive data from compromised systems and exploiting it for various malicious purposes.
Fix ToolSee If Your System Has Been Affected by Lumma Virus

Lumma’s behavior parallels that of stealers like Mars, Arkei, and Vidar. These malicious programs excel at exfiltrating both device/system and personal data, encompassing diverse files such as databases, images, documents, and videos from compromised systems.

These malware variants often harvest information from web browsers, including browsing history, search engine records, autofill details, login credentials, personally identifiable information, and credit card numbers.

Stealers cast a wide net, targeting various account types including emails, social media, messaging apps, gaming platforms, online banking, e-commerce, cryptocurrency wallets, and more. Depending on the stolen data’s sensitivity, cybercriminals can employ it for purposes ranging from blackmail to financial fraud.

Criminals may leverage communication platforms to steal identities, coerce victims’ contacts for loans or propagate malware. Financial accounts might be exploited for fraudulent transactions or unauthorized online purchases.

In conclusion, the presence of stealers like Lumma on devices poses severe threats, from privacy breaches to substantial financial losses and identity theft. Swift removal through anti-virus software is highly recommended in cases of infection.

Examples of Stealer-Type Malware

Our extensive analysis of malware samples has uncovered several recent additions to the stealer category, including Qwixx, RedEnergy, Luca Stealer, and SYS01. While their capabilities may vary, all forms of malware jeopardize device integrity and user safety, necessitating immediate elimination upon detection.

Infiltration of Lumma

Lumma’s proliferation relies on phishing and social engineering tactics, often disguising itself as ordinary software or bundled within it. Infected files may include Microsoft Office and PDF documents, archives, executables, JavaScript, and more. Upon execution, the infection cycle begins.

Common distribution methods encompass deceptive downloads, online scams, spam communications, dubious download sources, illegal software activation tools, and fake updates.

Preventing Lumma Stealer Installation:

Prudent practices are key to avoiding malware. Always source downloads from official and verified channels. Utilize legitimate developers’ functions/tools for activation and updates, avoiding illegal activation tools and fake updaters that could harbor malware.

Caution should be exercised when opening attachments or links from suspicious or irrelevant emails and messages, as these can trigger system infections.

An up-to-date, reputable anti-virus is essential. Conduct regular system scans and promptly remove detected threats. If infection is suspected, consider employing Gridinsoft Anti-malware to automatically eliminate infiltrated malware.

Remove Lumma with Gridinsoft Anti-Malware

We have also been using this software on our systems ever since, and it has always been successful in detecting viruses. It has blocked the most common Stealers as shown from our tests with the software, and we assure you that it can remove Lumma as well as other malware hiding on your computer.

Gridinsoft Anti-Malware - Main Screen

To use Gridinsoft for remove malicious threats, follow the steps below:

1. Begin by downloading Gridinsoft Anti-Malware, accessible via the blue button below or directly from the official website

2.Once the Gridinsoft setup file (setup-gridinsoft-fix.exe) is downloaded, execute it by clicking on the file.


3.Follow the installation setup wizard's instructions diligently.

Gridinsoft Setup Wizard

4. Access the "Scan Tab" on the application's start screen and launch a comprehensive "Full Scan" to examine your entire computer. This inclusive scan encompasses the memory, startup items, the registry, services, drivers, and all files, ensuring that it detects malware hidden in all possible locations.

Scan for Lumma Stealers

Be patient, as the scan duration depends on the number of files and your computer's hardware capabilities. Use this time to relax or attend to other tasks.

5. Upon completion, Anti-Malware will present a detailed report containing all the detected malicious items and threats on your PC.

The Lumma was Found

6. Select all the identified items from the report and confidently click the "Clean Now" button. This action will safely remove the malicious files from your computer, transferring them to the secure quarantine zone of the anti-malware program to prevent any further harmful actions.

The Lumma has been removed

8. If prompted, restart your computer to finalize the full system scan procedure. This step is crucial to ensure thorough removal of any remaining threats. After the restart, Gridinsoft Anti-Malware will open and display a message confirming the completion of the scan.

Remember Gridinsoft offers a 6-day free trial. This means you can take advantage of the trial period at no cost to experience the full benefits of the software and prevent any future malware infections on your system. Embrace this opportunity to fortify your computer's security without any financial commitment.

Trojan Killer for “Lumma” removal on locked PC

In situations where it becomes impossible to download antivirus applications directly onto the infected computer due to malware blocking access to websites, an alternative solution is to utilize the Trojan Killer application.

Trojan Killer - Main View

There is a really little number of security tools that are able to be set up on the USB drives, and antiviruses that can do so in most cases require to obtain quite an expensive license. For this instance, I can recommend you to use another solution of GridinSoft - Trojan Killer Portable. It has a 14-days cost-free trial mode that offers the entire features of the paid version. This term will definitely be 100% enough to wipe malware out.

Trojan Killer is a valuable tool in your cybersecurity arsenal, helping you to effectively remove malware from infected computers. Now, we will walk you through the process of using Trojan Killer from a USB flash drive to scan and remove malware on an infected PC. Remember, always obtain permission to scan and remove malware from a computer that you do not own.

Step 1: Download & Install Trojan Killer on a Clean Computer:

1. Go to the official GridinSoft website ( and download Trojan Killer to a computer that is not infected.

Download Trojan Killer

2. Insert a USB flash drive into this computer.

3. Install Trojan Killer to the "removable drive" following the on-screen instructions.

Install Trojan Killer to Removable Drive

4. Once the installation is complete, launch Trojan Killer.

Step 2: Update Signature Databases:

5. After launching Trojan Killer, ensure that your computer is connected to the Internet.

6. Click "Update" icon to download the latest signature databases, which will ensure the tool can detect the most recent threats.

Click Update Button

Step 3: Scan the Infected PC:

7. Safely eject the USB flash drive from the clean computer.

8. Boot the infected computer to the Safe Mode.

9. Insert the USB flash drive.

10. Run tk.exe

11. Once the program is open, click on "Full Scan" to begin the malware scanning process.

Searching Lumma Virus

Step 4: Remove Found Threats:

12. After the scan is complete, Trojan Killer will display a list of detected threats.

Searching Lumma Finished

13. Click on "Cure PC!" to remove the identified malware from the infected PC.

14. Follow any additional on-screen prompts to complete the removal process.

Restart needed

Step 5: Restart Your Computer:

15. Once the threats are removed, click on "Restart PC" to reboot your computer.

16. Remove the USB flash drive from the infected computer.

Congratulations on effectively removing Lumma and the concealed threats from your computer! You can now have peace of mind, knowing that they won't resurface again. Thanks to Gridinsoft's capabilities and commitment to cybersecurity, your system is now protected.

Frequently Asked Questions (FAQ)

What is Lumma Stealer?

Lumma Stealer is a type of malware that specializes in stealing sensitive information from compromised systems. It operates as Malware-as-a-Service and is distributed on Russian-speaking underground forums and Telegram.

What data does Lumma target?

It focuses on extracting various types of data, including cryptocurrency wallet information, personal files, browsing history, search engine data, autofill details, login credentials, personally identifiable information, and credit card numbers.

How does Lumma infiltrate systems?

This stealer commonly uses phishing and social engineering techniques to infect systems. It can be disguised as legitimate software or bundled with other files. When users unknowingly execute or open infected files, the malware initiates the infection process.

What are the potential risks posed by Lumma Stealer?

Lumma poses several risks, including severe privacy breaches, significant financial losses due to theft of sensitive financial information, potential identity theft, and exposure to other malicious activities facilitated by the stolen data.

Can Lumma Stealer be detected and removed?

Yes, reputable anti-virus software can detect and remove Lumma Stealer. Regular system scans using up-to-date anti-malware tools can help identify and eliminate the malware from infected systems.

What are the primary targets of Lumma Stealer?

Lumma Stealer targets a wide range of accounts, including emails, social media, messaging apps, gaming platforms, online banking, e-commerce, cryptocurrency wallets, and more. It aims to harvest valuable personal and financial information.

How can users prevent infection by Lumma Stealer?

Users can take precautions by sourcing downloads only from official and verified channels, avoiding illegal activation tools and fake updaters, exercising caution with email attachments and links, and regularly updating their anti-virus software.

What sets Lumma apart from other malware?

Lumma Stealer’s distinguishing features include its focus on cryptocurrency wallets and file extraction, its utilization as a Malware-as-a-Service, and its distribution through Russian-speaking underground forums and Telegram.

How do cybercriminals benefit from Lumma?

Cybercriminals use it to gather valuable data, which can be exploited for financial gain. They may engage in activities such as blackmail, spreading malware through victims’ contacts, making fraudulent transactions, or even stealing identities.

Why is Lumma considered a significant threat?

Lumma Stealer’s ability to access sensitive financial and personal data makes it a substantial threat. Its wide range of potential uses, from financial fraud to identity theft, highlights its potential for causing significant harm to individuals and organizatio
How to Remove Lumma Malware

Name: Lumma

Description: Lumma Stealer is an information-stealing malware written in the C programming language, offered as Malware-as-a-Service on Russian-speaking underground forums and Telegram. It is designed to infiltrate systems, exfiltrate data from infected devices, particularly focusing on cryptocurrency wallets and various files, and is often used by cybercriminals to facilitate identity theft, financial fraud, and other illicit activities.

Operating System: Windows

Application Category: Malware

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About the author

Daniel Zimmerman

I'm Daniel, a seasoned professional deeply passionate about the realm of security and malware defense. With over a decade of experience in the security industry and a background in writing, I am thrilled to share my expertise through this cybersecurity blog.

Throughout my career, I've had the privilege of working on the front lines of cybersecurity, tirelessly combating emerging threats and safeguarding digital environments. This hands-on experience has allowed me to develop a deep understanding of the ever-evolving landscape of malware and cyber-attacks.

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