Stealth and Destruction: Understanding the Threat of Stealer Log Malware

What is Stealer Log Malware?

Stealer Log malware is a sophisticated type of malicious software that penetrates computer systems without being detected. The pernicious capabilities of the malware allow it to stealthily infiltrate, sifting through various user data. These may include images, documents, local digital currency wallets, and browser session cookies. However, the principal target is the coveted browser autofill credentials.

Autofill credentials are particularly prized as they offer a potential goldmine of information. With these, cybercriminals can swiftly gain unauthorised access to a variety of online accounts linked to the infected system. The result can be devastating, leading to identity theft, financial losses, or even severe reputational damage.

 

How does it work?

Stealer Log often operates in conjunction with other forms of lucrative malware to optimise data extraction. For instance, it may work hand in hand with digital currency miners whose primary function is to commandeer the system’s resources to mine cryptocurrency, thereby generating profits for the wrongdoer. In other instances, it may pave the way for the installation of ransomware, taking the system hostage and demanding ransom, further contributing to the attacker’s ill-gotten gains.

Importantly, the damage doesn’t stop at the infected system. The stolen data is commonly sold on notorious hacker forums and via end-to-end encrypted text channels, widening the circle of potential abuse. As the information is of premium quality, it fetches a high price in the black market of online credentials.

 

How dangerous is this software?

The danger of this type of data, particularly autofill credentials, lies in its accuracy. Unlike credential stuffing, where hackers attempt to gain access by trying multiple potential passwords, the Stealer Log malware provides them with precise email and password combinations. This precision significantly reduces the hackers’ workload, as they generally need to try only one set of credentials – a stark contrast to the often-laborious task of trying up to 20 different passwords. As such, the Stealer Log malware presents a potent threat in the realm of cyber security.

 

A recent Stealer Log Malware attack

Our team have recently analysed through the data included in a large, unnamed collection of Stealer Log data. The results are presented in the infographic below.

 

How to prevent an attack?

It can often feel that the lists of new dangerous cyber threats are never-ending. This can be quite overwhelming, however, there are several measures we can adopt to lower the possibility of falling prey to stealer attacks — many of which will be familiar to those practicing decent cyber-security:

 

1. It is essential to keep your antivirus software updated. This is your first line of defence in any cyber threat situation. Further, it is advisable to conduct frequent scans on your devices to enhance your safety and ensure that your device’s security is not compromised.

 

2.  It is strongly recommended to avoid using pirated software. These illicit versions can often be coupled with malware that can compromise your system’s security, causing damage, allowing third-party access, or contributing to data theft.

 

3. Exercising caution when handling email attachments is another vital step in maintaining your cyber safety. Unexpected attachments can often be a disguise for harmful viruses or malware, infecting your system upon opening.

 

4. Utilising multi-factor authentication whenever it’s available is another valuable safety measure. It introduces an additional layer of security, making it more difficult for any malevolent individual who might gain access to your credentials to breach your accounts.

 

5. It’s advisable to avoid visiting ambiguous websites or clicking on advertisements that appear unbelievably enticing. These are often lures leading to unsecured sites where your information can be compromised, or malicious software can be installed onto your device.

 

6. Maintain good password practices is of utmost importance. Avoid using the same password across multiple platforms and services. Regularly changing your passwords can also enhance the security of your online accounts.

 

7. Lastly, if you’re alerted that your credentials have surfaced within stealer logs, it’s crucial to take immediate action (revise your passwords, execute comprehensive virus scans, and stay alert for unusual activity on your accounts)

 

If you want to better protect your organisations sensitive data against attacks, contact Intercede today and arrange a free audit to identify your weaknesses and book in for a demo of MyID PSM to see how we can protect you going forward.