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-Dropper

Trojan-Dropper programs are designed to secretly install malicious programs built into their code to victim computers. This type of malicious program usually save a range of files to the victim’s drive (usually to the Windows directory, the Windows system directory, temporary directory etc.), and launches them without any notification (or with fake notification of an archive error, an outdated operating system version, etc.). Such programs are used by hackers to: secretly install Trojan programs and/or viruses protect known malicious programs from being detected by antivirus solutions; not all antivirus programs are capable of scanning all the components inside this type of Trojans.

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Platform: Java

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


Technical Details

This Trojan is designed to install other Trojan programs to the victim machine without the knowledge or consent of the user. It is written in Java. The file is 42,155 bytes in size.


Once launched, the Trojan extracts the following files from itself, saves them to the Windows temporary directory, and launches them for execution:

  • (6 000 bytes, will be detected by Kaspersky Anti-Virus as Trojan.Win32.Alfora)
  • (15,360 bytes, will be detected by Kaspersky Anti-Virus as Trojan.Win32.Small.w)

    Removal instructions

    1. Delete the original Trojan file (the location will depend on how the program originally penetrated the victim machine).
    2. Delete and from the Windows temporary directory (%Temp%).
    3. Update your antivirus databases and perform a full scan of the computer (download a trial version of Kaspersky Anti-Virus).

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    Find out the statistics of the vulnerabilities spreading in your region on

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