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Global Internet Security Alerts


  • Rootkit:W32/ZAccess
    Rootkit:W32/ZAccess constantly displays advertisements on the infected machine and may silently contact remote servers to retrieve additional advertising information.
  • Backdoor:OSX/DevilRobber.A
    Backdoor:OSX/DevilRobber.A silently installs applications related to Bitcoin-mining; it may also harvest data from the infected machine and listen for additional commands from a remote user.
  • Backdoor:OSX/Tsunami.A
    Backdoor:OSX/Tsunami.A is a distributed denial-of-service (DDoS) flooder that is also capable of downloading files and executing shell commands in an infected system.
  • Trojan-Downloader:OSX/Flashback.C
    Trojan-Downloader:OSX/Flashback.C poses as a Flash Player installer and connects to a remote host to obtain further installation files and configuration.

Virus Activity

The World Map is a visual tool for presenting geographically grouped summaries of known virus infections.

View up-to-date map »

Safety Tip

Worms Most of the worms which use e-mail to propagate use Microsoft Outlook or Outlook Express to spread. If you need to use Outlook, download and install the latest Outlook security patch from Microsoft. In general, keep your operating system and applications up-to-date and apply the latest patches when they become available. Be sure to get the updates directly from the vendor.

Security Terms

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Entry Point Obscuration (EPO)

Entry point obscuration (EPO) techniques are used by virus writers to prevent virus scanners from detecting suspicious changes in the program's entry point. A program's entry point is an instruction specifying the beginning of the program's code, which the system uses to locate the correct starting point each time the program is executed.

Most file infector viruses will, on infection, subtly modify the host program's entry point so that it points to the beginning of the viral code, which can be located almost anywhere in the file. The change in entry point forces the system to execute the viral code first whenever the user attempts to launch the host program; after the viral code has been executed, most viruses will pass control back to the host program, allowing it to launch normally.

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