Parent class: VirWare
Viruses and worms are malicious programs that self-replicate on computers or via computer networks without the user being aware; each subsequent copy of such malicious programs is also able to self-replicate. Malicious programs which spread via networks or infect remote machines when commanded to do so by the “owner” (e.g. Backdoors) or programs that create multiple copies that are unable to self-replicate are not part of the Viruses and Worms subclass. The main characteristic used to determine whether or not a program is classified as a separate behaviour within the Viruses and Worms subclass is how the program propagates (i.e. how the malicious program spreads copies of itself via local or network resources.) Most known worms are spread as files sent as email attachments, via a link to a web or FTP resource, via a link sent in an ICQ or IRC message, via P2P file sharing networks etc. Some worms spread as network packets; these directly penetrate the computer memory, and the worm code is then activated. Worms use the following techniques to penetrate remote computers and launch copies of themselves: social engineering (for example, an email message suggesting the user opens an attached file), exploiting network configuration errors (such as copying to a fully accessible disk), and exploiting loopholes in operating system and application security. Viruses can be divided in accordance with the method used to infect a computer:- file viruses
- boot sector viruses
- macro viruses
- script viruses
Class: Worm
Worms spread on computer networks via network resources. Unlike Net-Worms, a user must launch a Worm in order for it to be activated. This kind of worm searches remote computer networks and copies itself to directories that are read/write accessible (if it finds any). Furthermore, these worms either use built-in operating system functions to search for accessible network directories and/or they randomly search for computers on the Internet, connect to them, and attempt to gain full access to the disks of these computers. This category also covers those worms which, for one reason or another, do not fit into any of the other categories defined above (e.g. worms for mobile devices).Read more
Platform: VBS
Visual Basic Scripting Edition (VBScript) is a scripting language interpreted by Windows Script Host. VBScript is widely used to create scripts on Microsoft Windows operating systems.Description
Technical Details
This is a worm written in Visual Basic Script language (VBS). It spreads through a network by coping itself to other computers in the network.
Upon being activated, the worm generates a random network IP address (for example 145.65.28.0), and tries to connect to all computers in this network. It changes the last octet of an address from 1 to 255 and tries to connect. If the connection is accepted, the worm copies itself to a connected computer on drive C: in the following folders:
C:
C:WINDOWSSTARTM~1PROGRAMSSTARTUP
C:WINDOWS
C:WINDOWSSTART MENUPROGRAMSSTARTUP
C:WIN95START MENUPROGRAMSSTARTUP
C:WIN95STARTM~1PROGRAMSSTARTUP
C:WIND95
If all computers in this network are inaccessible, the worm generates a new network IP address.
The worm creates a file "C:NETWORK.LOG". In this file, the worm writes all of its activities. The file content appears as follows:
Log file Open
Subnet : 145.65.28.0
Subnet : 23.44.93.0
Subnet : 50.112.201.0
Subnet : 176.3.138.0
Copying files to : \176.3.138.5�
Successfull copy to : \176.3.138.5�
The spreading ability of this worm is very low, because search of a victim computer takes a lot of time and most computers reject a requested connection.
Read more
Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com