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Category: Malware

Type: Trojan-Downloader

Aliases: Small.DDY


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


Automatic action

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

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Submit a sample

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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:


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