FormBook

Posted: December 24, 2023

from Cybersecurity Glossary

Aliases:

xLoader

Category:

Spyware

Platform:

Windows , macOS , Linux

Variants:

As a MaaS, FormBook can have many variants

Damage:

Malware Infection, File Corruption And Loss, Stolen Keystrokes, System Performance Issues, Network Connectivity Problems, Unauthorized Access, Data Theft

Risk Level:

High

FormBook is categorized as malware, specifically spyware, with the capability to extract files and data from the user's device, apps, and even capture keystrokes and clipboard content. Additionally, it can intercept data entered by users, including information from web forms and login pages, prior to encryption.

Possible symptoms

Unusual system performance degradation
Frequent network connectivity issues
Unexpected file corruption and loss
Keystrokes and clipboard data interception
Unauthorized access to sensitive information
Data theft incidents

Sources of the infection

Malicious email attachments and links
Compromised websites and drive-by downloads
Infected external devices and storage media
Exploits targeting software vulnerabilities
Compromised software updates
Malicious advertisements (malvertising)

Overview

FormBook, also known as xLoader, is a malicious software categorized as spyware, designed with the insidious purpose of infiltrating devices to pilfer files and data from various applications. Its damaging potential encompasses malware infections, file corruption and loss, stolen keystrokes, system performance issues, network connectivity problems, unauthorized access, and data theft.

The spyware operates across multiple platforms, including Windows, macOS, and Linux. It manifests through various symptoms such as unusual system performance degradation, frequent network connectivity issues, unexpected file corruption and loss, keystrokes and clipboard data interception, unauthorized access to sensitive information, and incidents of data theft.

FormBook functions by capturing screenshots and transmitting the acquired information back to the attacker. As a Malware-as-a-Service (MaaS), FormBook can have numerous variants, making it a versatile and adaptable threat.

If infected, it is crucial to take immediate action. Isolate the infected device from the network to prevent further spread, run a Gridinsoft Anti-Malware scan to detect and remove FormBook, review system logs for any suspicious activity, and identify compromised files. Additionally, restoring affected files and data from backups taken before the infection is recommended.

Preventing FormBook infections requires proactive measures. Regularly updating the operating system and software to patch vulnerabilities is essential. Employing a robust antivirus/anti-malware solution and keeping it up to date adds an extra layer of defense. Implementing intrusion detection and prevention systems helps identify and block malicious activities, while application whitelisting controls the execution of programs on the system. Monitoring network traffic for unusual patterns and connections is another crucial step in maintaining cybersecurity.

🤔 What to do?

If you suspect your system is infected with FormBook, take the following actions:

Isolate the infected device from the network to prevent further spread.
Run a Gridinsoft Anti-Malware scan to detect and remove FormBook.
Review system logs for any suspicious activity and identify compromised files.
Restore affected files and data from backups taken before the infection.

🛡️ Prevention

To prevent FormBook infections, follow these technical measures:

Regularly update your operating system and software to patch vulnerabilities.
Employ a robust antivirus/anti-malware solution and keep it up to date.
Implement intrusion detection and prevention systems to identify and block malicious activities.
Use application whitelisting to control the execution of programs on your system.
Monitor network traffic for unusual patterns and connections.

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