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: 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.Description
Technical Details
Sluter is a worm virus that spreads over Win32 networks through shared resources.The worm is a Windows PE EXE file about 18KB in length (when compressed by UPX, the decompressed size is about 45KB). It is written in Microsoft Visual C++.
When the infected file is run the worm registers itself in the system registry auto-run key:
HKLMSoftwareMicrosoftWindowsCurrentVersionRun
superslut = { worm file name }
Next, Sluter runs its spreading routines.
The spreading routine runs up to 60 "threads" which scan port 445 at random IP addresses. When successfully connecting to a victim machine it tries to locate open resources on the remote computer and connects to them using several passwords such as:
"","admin", "root", "123", e.t.c.
If a successful connection is made the worm copies itself to the victim machine under the following names:
c$winntsystem32msslut32.exe Admin$system32msslut32.exe
The worm doesn't have any payload and does not manifest itself in any other way.
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