Trojan-Downloader:W32/JQCN

Classification

Category :

Malware

Type :

Trojan-Downloader

Aliases :

Trojan.Downloader.JQCN, Trojan.GenericKD.[variant]

Summary

This type of trojan secretly downloads malicious files from a remote server, then installs and executes the files.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

This trojan-downloader is distributed as a file attachment to spam emails. The attached programs are typically labelled using legitimate-sounding document names, such as 'invoice', as a simple form of social engineering.

On execution of the attached file, the trojan-downloader will attempt to install itself onto the machine, then contact a remote server for additional files and/or instructions.