PWSteal.Reoxtan keeps password and other information it steals on a text file on the infected computer.Those changes cannot be undone by some antivirus products, and must be manually restored. and PWSteal.Reoxtan modify registry entries and files.Removing the backdoor does not address what may have come through it in the time between infection and removal. In the cases of and, the backdoor allows material separate from the worm to be installed.In all these sample cases, removing the infection (the virus) still leaves problems: The last installs a monitor that attempts to capture passwords and uploads them to some remote computer. The third turns an infected computer into a proxy, which allows someone to direct internet traffic through in order to obscure the source of the traffic.
The first two examples actively open a backdoor, through which other malicious programs can be loaded.
Often, the virus or worm itself is merely the carrier of something more malicious, and most current infections leave the computer open to further compromise. The reason for this instruction is that a threat usually exists beyond the virus, worm, or Trojan itself.
Information Security Office (UISO) will instruct you to reformat your hard drive (erase Windows) and reinstall Windows from scratch, even if your antivirus program or other antiviral tools can remove the virus or delete the infection. Why you should reformat your hard drive and reinstall Windows after your computer is infected with a virusįor many virus, worm, or Trojan computer infections, the
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