What is Lu0Bot malware?
Lu0Bot is a trojan that was first observed in 2021. Although less widely used than other trojan malware, such as Agent Tesla, it has the potential to inflict serious damage on infected systems.
A notable feature of Lu0Bot is its use of Node.js, an unusual programming language choice for malware. However, this unconventional approach provides Lu0Bot with versatility compared to most malicious programs that are usually developed using the .NET framework, which is limited to Windows systems.
Despite being a highly capable threat, Lu0Bot has a relatively low level of activity. Currently, its primary function is data harvesting, but it can also be used as a DDoS attack bot and may have other capabilities.
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Technical details of the Lu0Bot malicious software
Once Lu0Bot is fully deployed on the system, it can engage in:
- Keystroke recording: It can perform keylogging and record the keys that are pressed by the user, for instance, when they enter their login credentials.
- Identity theft: It can steal the victim’s personal information, including credit card numbers and other sensitive data.
- System control: Using Lu0Bot, attackers can execute a wide variety of activities, as the malicious software is capable of establishing near-full control over the device.
- DDoS attacks: The malware can exploit the compromised system and use it to participate in a distributed denial-of-service (DDoS) attack.
Lu0Bot is highly obfuscated, meaning that its code is deliberately made difficult to read and understand in order to prevent or obstruct analysis. It uses several encryption algorithms, including custom ones.
By comparing Lu0Bot samples from 2021 and 2023, it becomes clear that the software is being continuously updated by its developers.
Read a detailed analysis of a Lu0Bot sample in our blog.
Execution process of Lu0Bot
In order to see how Lu0Bot operates and collect up-to-date IOCs, let’s examine one of its samples in the ANY.RUN sandbox.
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The execution chain of this malware family is relatively straightforward. After the payload executes, it uses CMD to copy and initiate the main malware process. This process is responsible for carrying out all malicious activities, including data theft, C&C server communication, and, in this case, gathering process information using WMIC.EXE.
Lu0Bot's process tree demonstrated in ANY.RUN
Distribution methods of the Lu0Bot malware
In the early days, Lu0Bot was primarily dropped by GCleaner, a specialized software for deploying second-stage payloads. Yet, today, the main method of delivery for this malware is phishing emails. Essentially, attackers employ various social engineering techniques in order to get their victims to download malicious email attachments or open unsafe links and trigger the infection chain reaction on their systems.
Despite being a known threat, the true scale of Lu0Bot's operations remains unknown. This makes it a dangerous malware capable of dealing a significant blow to any infrastructure, if not addressed proactively. Therefore, organizations must implement proper security measures to prepare for Lu0Bot attacks.
One of the most effective ways to prevent a Lu0Bot attack is to check any incoming files and links, especially those sent by unknown senders, in the ANY.RUN sandbox. It is a malware sandbox that lets you quickly understand if the file or link your are dealing with is malicious or not.
ANY.RUN is fully interactive, enabling you to engage with the infected system like you would on your own computer but in a safe cloud environment to fully understand the behavior of the malware. It also provides comprehensive reports that include IOCs and malware configs.
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