Threat Description

Trojan-Downloader: JS/Agent.D

Details

Category: Malware
Type: Trojan-Downloader
Platform: JS
Aliases: Trojan-Downloader:JS/Agent.D

Summary


Trojan-Downloader:W32/Agent.D is typically found on certain malicious sites. When activated, it downloads an EXE file from a website and saves it into the root directory of the C: drive. The downloaded file is then run.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.



Technical Details


Technically. Agent.D's executable file is an HTML Application (HTA file). This file type is normally run by the MSHTA.EXE application, a program that comes standard with Windows.

While it is running, Agent.Dhides its window from the user when it is running by resizing the window to a zero size and preventing it from being visible in the Taskbar.

The trojan also drops a file named CMD.BAT into the root directory of the C: drive. This BAT file is used for cleanup purposes only: it deletes the trojan's file from the hard disk.






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