Trojan uses remote user account to control compromised machine

Posted by   Virus Bulletin on   Jul 18, 2011

Malware targets customers of Brazilian banks.

Researchers at Kaspersky have discovered a piece of malware aimed at customers of Brazilian banks which creates a remote user account to enable attackers to take full control of the compromised machine.

The malware is spread via an email that poses as an update to Flash Player. Although the downloader does actually install a legitimate version of Flash Player, it also downloads what may at first look like an innocent .txt file. Once downloaded, however, the extension is changed to .msi, that of a Windows Installer file, and malicious files are installed on the system.

The malware installs a legitimate DLL which allows multiple users to be logged in at the same time, and also installs a number of DLLs which are responsible for stealing user credentials for the online banking systems of various Brazilian banks. The malware also creates a password-protected user account, 'Remo', which is used by the attackers to log into the machine and take full control of it.

The researchers discovered a web page that keeps track of infected machines, listing over 3,300 machines. This may seem a small number compared to the size of some botnets, but given that it is targeted at one country, with one particular goal (stealing money), the malware stands to make the criminals large amounts of money.

More at Kaspersky's Securelist blog here.

Kaspersky's Fabio Assolini will present 'Bonnie and Clyde: the crazy lives of the Brazilian bad guys', detailing the profitability of the Brazilian cybercrime scene, at VB2011 later this year.

VB2011 takes place 5-7 October in Barcelona, Spain. Registration is now open.

Posted on 18 July 2011 by Virus Bulletin

twitter.png
fb.png
linkedin.png
hackernews.png
reddit.png

 

Latest posts:

VB2020 localhost call for last-minute papers now open!

The call for last-minute papers for VB2020 localhost is now open. Submit before 17 August to have your paper considered for one of the nine slots reserved for 'hot' research!

Announcing... VB2020 localhost

Announcing VB2020 localhost: the carbon neutral, budget neutral VB conference!

VB2019 paper: APT cases exploiting vulnerabilities in region-specific software

At VB2019, JPCERT/CC's Shusei Tomonaga and Tomoaki Tani presented a paper on attacks that exploit vulnerabilities in software used only in Japan, using malware that is unique to Japan. Today we publish both their paper and the recording of their…

New paper: Detection of vulnerabilities in web applications by validating parameter integrity and data flow graphs

In a follow-up to a paper presented at VB2019, Prismo Systems researchers Abhishek Singh and Ramesh Mani detail algorithms that can be used to detect SQL injection in stored procedures, persistent cross-site scripting (XSS), and server‑side request…

VB2020 programme announced

VB is pleased to reveal the details of an interesting and diverse programme for VB2020, the 30th Virus Bulletin International Conference.

We have placed cookies on your device in order to improve the functionality of this site, as outlined in our cookies policy. However, you may delete and block all cookies from this site and your use of the site will be unaffected. By continuing to browse this site, you are agreeing to Virus Bulletin's use of data as outlined in our privacy policy.