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: Net-Worm
Net-Worms propagate via computer networks. The distinguishing feature of this type of worm is that it does not require user action in order to spread. This type of worm usually searches for critical vulnerabilities in software running on networked computers. In order to infect the computers on the network, the worm sends a specially crafted network packet (called an exploit) and as a result the worm code (or part of the worm code) penetrates the victim computer and activates. Sometimes the network packet only contains the part of the worm code which will download and run a file containing the main worm module. Some network worms use several exploits simultaneously to spread, thus increasing the speed at which they find victims.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
When launched, the worm injects its code in the address space of one of the active “svchost.exe” system processes. This code delivers the worm's main malicious payload and:- disables the following services:
wuauserv BITS
- blocks access to addresses which contain any of the strings listed below:
indowsupdate wilderssecurity threatexpert castlecops spamhaus cpsecure arcabit emsisoft sunbelt securecomputing rising prevx pctools norman k7computing ikarus hauri hacksoft gdata fortinet ewido clamav comodo quickheal avira avast esafe ahnlab centralcommand drweb grisoft eset nod32 f-prot jotti kaspersky f-secure computerassociates networkassociates etrust panda sophos trendmicro mcafee norton symantec microsoft defender rootkit malware spyware virus
http://<URL>/search?q=<%rnd2%>rnd2 is a random number; URL is a link generated by a special algorithm which uses the current date. The worm gets the current date from one of the sites shown below:
http://www.w3.org http://www.ask.com http://www.msn.com http://www.yahoo.com http://www.google.com http://www.baidu.comDownloaded files are saved to the Windows system directory under their original names.
Read more
Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com
Found an inaccuracy in the description of this vulnerability? Let us know!