Trojan.Win32.Nymaim

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

A malicious program designed to electronically spy on the user’s activities (intercept keyboard input, take screenshots, capture a list of active applications, etc.). The collected information is sent to the cybercriminal by various means, including email, FTP, and HTTP (by sending data in a request).

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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

The earliest versions of malware in this family were loaders. They downloaded country-specific programs, intended to block computer use, onto the victim computer. Other versions of Trojan.Win32.Nymaim malware were found later. The newer variants incorporate Gozi, a Trojan used to steal online banking information from user computers. Features of this malware family include:

• Strong obfuscation of malicious code
• RC4 traffic encryption with garbage data added for masking purposes
• DNS spoofing
• [some variants] Domain Generation Algorithm (DGA) use for hiding the IP address of the cyberattacker’s server

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

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Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com