Fileless malware

What is fileless malware?

Fileless malware is a type of malicious software that does not use traditional files to infect a computer. Instead, it exploits existing programs and processes on the system to carry out malicious actions.

This makes it harder to detect and remove, as it does not leave typical traces like regular malware files do.

For example, fileless malware can use scripts that run directly in memory (RAM) or exploit legitimate tools such as PowerShell or Windows Management Instrumentation (WMI) to execute its attacks. This makes it a more sophisticated and stealthy threat compared to traditional malware.

To protect yourself against fileless malware, you can follow these measures:

Use updated antivirus software: Even though fileless malware doesn’t use traditional files, modern antivirus programs can detect suspicious activity in memory and other system processes.
Enable firewall: A firewall can prevent unauthorized access to your system and block suspicious connections.
Keep your system and software updated: Regular updates to the operating system and software can patch security vulnerabilities that fileless malware might exploit.
Limit use of administrative privileges: Use a standard user account for daily work and limit administrative privileges to reduce the risk of malware gaining full access to the system.
Monitor network traffic: Use tools to monitor network traffic and detect unusual activities that might indicate an attack.
Be cautious with email attachments and links: Avoid opening attachments or clicking on links from unknown or suspicious sources.
Use security tools like EDR (Endpoint Detection and Response): EDR tools can detect and respond to suspicious activity on endpoints in real-time.

Sicra and filefree malware

Several of Sicra’s partners provide measures against fileless malware. We can assist with implementation and follow-up.

Arctic Wolf: Managed Detection and Response (MDR) can protect against fileless malware by monitoring and responding to suspicious activity in real-time.
F5: F5’s Fraud Protection Service (FPS) offers comprehensive protection against various types of malware, including fileless malware, by using advanced detection methods.
Microsoft: Microsoft Defender Antivirus, which is built into Windows, uses advanced features to detect and remove malicious software, including fileless malware.

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