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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

Beware of Strangers Never accept attachments from strangers in online chat systems such as IRC, ICQ or AOL Instant Messenger.

Security Terms

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CAPTCHA

The Completely Automated Public Turing Test to tell Computers and Humans Apart (CAPTCHA) is a commonly used challenge-response test to prevent attackers from using computer-generated responses to perform certain repetitive actions, such as signing up for e-mail accounts, submitting online forms and so on.

This test is commonly used on websites, web-based e-mail services and other processes where an automated-response type attack may reasonably be possible. A CAPTCHA test usually involves the user attempting to solve to a challenge that current software cannot solve, most commonly by deciphering a distorted visual image to discern numbers and letters; a correct answer to the challenge results in the assumption that the user is human, and is therefore permitted to use the service.

The widespread use of CAPTCHA security precautions have, ironically, led to the development of attack techniques specifically designed to crack CAPTCHA; most of these attacks still involve human interaction at some stage.

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