Threat Description



Aliases: Small.DDY
Category: Malware
Type: Trojan-Downloader
Platform: W32


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


Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.

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:

  • HTTP://[REMOVED].exe

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


F-Secure Anti-Virus detects this malware with the following updates:
Detection Type: PC
Database: 2006-07-10_02


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