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Aliases :

Jeem, Maz, Inor, Troj_Inor.A, Troj/Dloader-BO, , Downloader-BO, Downloader.Trojan, Trojan.PSW.Jeem, TrojanDownloader.Win32.Inor


Jeem is a backdoor with data stealing capabilities. It consists of 2 parts - a downloader called Inor and the backdoor itself.


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

The Inor downloader is a small UPX-packed program. When run, it tries to download Jeem backdoor from a website and to activate it. The downloader will continuously try to download the backdoor and will uninstall itself only when its mission is complete. The downloader saves the time when the backdoor was downloaded in System Registry.

The Jeem backdoor is a UPX-packed file that is downloaded by Inor downloader (see above). It installs itself to system and creates a key in System Registry to be always run with Windows. The backdoor listens to remote commands and can be used to get a limited access to an infected system. The backdoor can be used as a mail relay as well. The backdoor also searches for *.SEI files and can send their contents out to a specified email address.

F-Secure Anti-Virus detects the downloader as 'TrojanDownloader.Win32.Inor' and the backdoor as 'Trojan.PSW.Jeem' with the latest updates.

Disinfection solution for the backdoor and its downloader is to delete or rename their files.