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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

Sharing Folders Do not share your folders with other users unless necessary. If you do, make sure you do not share your full drive or your Windows directory.

Security Terms

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Denial of Service (DoS)

A type of attack conducted over the Internet, in which a massive amount of data is sent to a targeted computer system or resource (e.g., a program, website or network), with the aim of overwhelming and crashing it.

A Denial of Service (DoS) attack is typically conducted by a single, or small group of, computer systems and can be performed in a variety of ways. Even if a DOS attack does not result in the target totally crashing, so much resources may have been diverted to deal with the attack that performance is significantly degraded, or other users are unable to use the system or resource until the attack has ended.

PC Health Toolbox

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