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Small.CGS

Classification

Category: Trojan

Type: -

Aliases: Small.CGS

Summary


We got reports of this trojan downloader on Jan 27th 2006. The trojan downloader was spammed to a large amount of email addresses. The downloader is programmed to download a backdoor from website.

Removal


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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Technical Details


The trojan's file is a PE executable file packed with FSG file compressor. According to reports, the trojan was spammed in messages that looked like this:

Subject: YOUR BILL PAYMENT NOT APPROVED!Attachment: BILL_235563880.EXE

When the attachment is run, the trojan first tries to add its file to Windows XP built-in firewall policy using the following key:

[HKLM\PATH_TO_FW_POLICY\AuthorizedApplications\List]

After that, the trojan tries to download and activate backdoor from web site dalvabrothersinc.com . The backdoor is already detected as Trojan.Win32.Delf.qx with FSAV updates version 2005-12-23_1.