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.


Technical Details

this text was written by Alexey Podrezov, Data Fellows Ltd

This Trojan, when run, shows nothing important on the screen imitating hard disk formatting and Flash Bios corruption. At the same time, it copies itself to the Windows directory and modifies the Windows registry to be run upon the next Windows start-up. It also renames WIN.COM to WIR.COM so Windows cannot be started normally any more. Even if you rename WIR.COM to WIN.COM and start Windows, the Trojan will run, repeate its activities and shutdown Windows. The Trojan also modifies some Windows settings in the registry. The only way to get rid of it is to manually delete LOVEYOU.EXE from the Windows directory (from DOS prior to Windows startup) and then rename WIR.COM back to WIN.COM.

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