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Global Internet Security Alerts


  • Trojan.Java.Agent.I
    Trojan.Java.Agent.I is a trojan-dropper written in Java. On execution, the malware drops and runs an executable file.
  • Trojan.Iframe.BMY
    Trojan.Iframe.BMY (and the similar Trojan.JS.Iframe.CVT and Trojan.Iframe.BZW detections) identify webpages that contain a suspicious hidden iframe appended to the end of their HTML code.
  • Trojan-Dropper:OSX/Revir.D
    Trojan-Dropper:OSX/Revir.D silently drops other malicious programs onto the machine; on execution, Revir.D opens a decoy file to distract the user from the program's malicious activities.
  • Backdoor:OSX/Imuler.B
    Backdoor:OSX/Imuler.B contacts a remote server for instructions; it may then steal files or capture a screenshot of the infected computer system, which is later forwarded to the remote server.

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

Show File Extensions Configure Windows to always show file extensions. In Windows 2000, this is done through Explorer via the Tools menu: Tools/Folder Options/View - and uncheck "Hide file extensions for known file types". This makes it more difficult to for a harmful file (such as an EXE or VBS) to masquerade as a harmless file (such as TXT or JPG).

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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