Trojan.MSIL.Cryptos

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.

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).

The Common Intermediate Language (formerly known as Microsoft Intermediate Language, or MSIL) is an intermediate language developed by Microsoft for the .NET Framework. CIL code is generated by all Microsoft .NET compilers in Microsoft Visual Studio (Visual Basic .NET, Visual C++, Visual C#, and others).

Malware of this family performs the following actions without the user’s authorization: destruction, blocking, modification, or copying of information; interference with the functioning of computers or computer networks. The body of the malware is encrypted.

Geographical distribution of attacks by the Trojan.MSIL.Cryptos family

Geographical distribution of attacks during the period from 20 January 2016 to 20 January 2017

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

* Percentage among all unique Kaspersky Lab users worldwide attacked by this malware