While this usually gives a good indication, it is better to check the computer system with tools that have been specifically designed to detect and remove the Conficker variants.Ī few tools that can be used to detect and remove Conficker variants are ESET Conficker Removal Tool, Downadup from F-Secure or KidoKiller by Kaspersky.Įxcellent information about Conficker detection and removal instructions are available at. The easiest way of detection is by accessing a site like or and comparing the results with accessing the site using the IP addresses (207.46.197.32 and 206.204.52.31). This process will be repeated every 24 hours. If new instructions are found on one of the urls it will download them and execute them on the computer system. It will then select 500 randomly from the list and try to connect to them. Nuestra biblioteca de programas le ofrece una descarga gratuita de WebMon 13.0. The worm will generate a list of 50K domain names and append a list of 116 top level domains to them. A very sophisticated updating mechanism has been implemented by the author. The worm will try to retrieve new instructions on April 1, 2009. The real danger comes from the updating mechanism of Conficker C. While this is surely a nuisance for the user, it does mean that the worm itself is not harming the user system in any way other than the methods described above. This is to prevent users from accessing websites that contain information and removal instructions to find out more about or remove the worm. For 250 containers, WebMon performed its evaluation in 339 s on the same number of domains. For 100, 150, and 200 containers, WebMon performed malicious verification in 690, 509, and 434 s, respectively. Among the strings are domains of various security companies like microsoft, panda or symantec but also generic strings like defender, conficker or anti-. Download and installation of this PC software is free and 1.0.12 is the latest version last time we checked. This trade-off was almost equal in other tests. Domain names making use of those strings cannot be accessed unless the IP is used to do so. The worm will block certain strings from being accessed on the Internet. This prevents other viruses from exploiting the vulnerability while keeping a backdoor open for newer variants of the Conficker worm. The worm will then patch the security hole on the computer system that allowed it to attack the system in first place. Conficker C will initiate a number of processes on infected host systems including opening a random port which is being used in the distribution process of the worm.
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