Trojan-Banker.Win32.Banbra

Parent class: TrojWare

Trojans are malicious programs that perform actions which are not authorized by the user: they delete, block, modify or copy data, and they disrupt the performance of computers or computer networks. Unlike viruses and worms, the threats that fall into this category are unable to make copies of themselves or self-replicate. Trojans are classified according to the type of action they perform on an infected computer.

Class: Trojan-Banker

Trojan-Banker programs are designed to steal user account data relating to online banking systems, e-payment systems and plastic card systems. The data is then transmitted to the malicious user controlling the Trojan. Email, FTP, the web (including data in a request), or other methods may be used to transit the stolen data.

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Platform: Win32

Win32 is an API on Windows NT-based operating systems (Windows XP, Windows 7, etc.) that supports execution of 32-bit applications. One of the most widespread programming platforms in the world.

Description

This malware family is designed to steal personal information from the clients of Brazilian banks. Methods and technologies used by this malware are generally crude. Written in Delphi or .NET, the malware uses fraudulent forms to obtain the information necessary for bypassing two-factor authentication. One example of this malware family is the Telax banking Trojan. The main Telax module is written in Delphi and is approximately 12 MB in size. The Trojan loader is written C#, with a size of under 500 KB. The Trojan is capable of performing simple commands received from the control server, such as controlling the mouse, pressing a key combination in an open window, deleting itself, and restarting the computer. Data from the user's computer is transmitted via a POST request without encryption. Request parameters are named in Portuguese:

• ID_MAQUINA – computer ID
• VERSAO – Trojan version
• WIN – operating system
• NAVEGADOR – browser executable file
• PLUGIN – plug-in name
• AV – name of installed anti-virus software

Top 10 countries with most attacked users (% of total attacks)

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