Trojan.Java.Nocheat

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: Java

Java is a platform for developing and running programs written in the Java programming language.

Description

Technical Details

Java.Nocheat is a Trojan program written in the Java programing language. It makes it possible to alter the system registry and files on victim computers.

The program contains four files:

 Count.class
 Dummy.class
 nocheat.class
 ok.class

Count.class - size 20686 bytes. It loads the class files "nocheat.class" and executes its function Init. This program component uses an Exploit to Virtual Java Machine. The file "nocheat.class" will have access local files and the system registry.

Dummy.class - size 235 bytes. It contains the void function and variable under the name: URLClassLoader.

nocheat.class - size is 6518 bytes. This is the main component of the Trojan program and can execute several commands on a local computer. The commands are: - The "HP" command -
Changes the start page of Internet Explorer

- The "SS" command -
Adds athe following string to the system registry key:

 "\Internet Settings\SafeSites"

- The "HST" command -
Adds a string to the "hosts" file in the directory:

 system32driversetc

- The "FV" command -
Creates the ".url" file into the filder "Favorites" for a current user.

- The "DT" command -
Creates a ".url" file in the "Desktop" folder of the current user.

- The "SP" command -
Changes the system registry keys:

 "Internet Explorer", "SearchURL"
 "Internet Explorer\Main", "Use Custom Search URL"
 "Internet Explorer\Main", "Search Page"
 "Internet Explorer\Main", "Search Bar"
 "Internet Explorer\Search", "SearchAssistant"
 "Internet Explorer\Search", "CustomizeSearch"
 "Internet Explorer\Main", "Default_Search_URL"
 "Internet Explorer\Main", "Search Page"
 "Internet Explorer\Search", "SearchAssistant"

ok.class - size 996 bytes. Contains the functions of "myDefineClass" and "loadClass".

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