Upon execution Dumaru.Y installs several copies of itself to the computer:
Dumaru.Y uses its own SMTP engine to send emails. The SMTP engine performs a direct name service lookup on the target domain so it does not depend on the infected computer's email server settings.
To collect email addresses the worm recursively searches through all the directories on the computer and looks for files that could contain email addresses:
Going through the list of collected addresses Dumaru.Y sends emails with infected attachments that have to following characteristics:
From: "Elene" [F*CKENSUICIDE@HOTMAIL.COM] To:
Subject: Important information for you. Read it immediately ! Body: Here is my photo, that you asked for yesterday.
Dumaru.Y contains several backdoor and data stealing components as payload.
Dumaru.Y installs an FTP server to TCP port 10000 which provides unrestricted FTP access to all the files on the infected computer.
On port 2283 a TCP forwarding proxy is listening which can be used by remote attackers to initiate connections through the infected computer.
Dumaru.Y - just like it's earlier variants - comes with capabilities to steal sensitive user data:
- clipboard data
- Protected Storage Data
- User credentials and key log data of visits to www.e-gold.com
The collected data is sent to a predefined email address.