Classification

Category :

Malware

Type :

Trojan-Downloader

Aliases :

Small.DDY

Summary

Small.DDY is a trojan downloader that attempts to secretly download and execute a file from a malicious website.See below for details.

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

Small.DDY is an FSG packed malware that injects malicious code into svchost.exe. It does so by creating a new instance of svchost.exe using the malware as its parameter. After execution it deletes the executable file.The injected malware code checks for an Internet connection every 250ms. Once an Internet connection has been established, it will attempt to download and execute a file from the following URL:

  • https://81.95.146.107/[REMOVED].exe

The downloaded file is saved in the Windows directory using the filename: au.exe.