Vulnerabilities / Threats
05:25 PM
Connect Directly

New Version Of CenterPOS Malware Taps Rush To Attack Retail Systems

EMV will make it much harder for criminals to steal payment card data, so there's a rush to do it while they can

The ongoing migration of the US payment system to smartcards based on the EMV standard is expected to cut down certain types of credit and debit card fraud in a big way. But that’s not stopping attackers from rushing in to take advantage of those who haven’t made the switch to the new standard yet.

Designed to help them on that mission is a new version of CenterPOS, a malware tool that was released last September to steal credit and debit card data from point-of-sale (POS) systems.

Security firm FireEye, which discovered the updated version of CenterPOS recently, described it as being functionally very similar to the original version but supporting certain features that make it more dangerous.

One of the key differences in the new version of CenterPOS is its ability to create a configuration file for storing information on the command-and-control server it communicates with, right from the payload itself.

When CenterPOS is executed, the first thing it does is to search for a configuration file that contains the C&C information. If it doesn’t find a configuration file, the malware is designed to open a dialog box that prompts for a password, FireEye said.

“If the correct password is entered, a dialog box will appear that allows an operator to enter CnC information, as well as a password used to encrypt the configuration file,” the company said in its alert.

The malware payload contains the functionality to create a configuration file, says Nart Villeneuve, principal threat intelligence analyst at FireEye in comments to Dark Reading. The reason it is important is because it allows malware operators to update command-and-control information more easily and as needed.

“This is uncommon. Usually, malware tools have a separate component called a 'builder' that is used to create a payload that contains the CnC information,” he says. The capability is useful in situations where a security tool might block access to the CnC server and the attacks need to configure a new one to which the malware can connect, he says.

A configuration file is a handy mechanism for storing CnC data, according to Villeneuve. Simply by deleting the configuration file after an attack, a threat actor can wipe clean all information on the location of the server with which the malware was communicating. Maintaining a separate configuration file also ensures that command-and-control data is not compromised if the malware executable itself is detected, quarantined, and analyzed. “This makes it hard to track the activities of specific threat groups, Villeneuve says.

CenterPOS uses what FireEye described as a “smart scan” mode and a normal mode to look for credit and debit card data being handled by a compromised system. It encrypts all data that matches the description of what it is looking for using TripleDES encryption using an encryption key provided in the configuration file. All data collected is then sent to a server controlled by operators of the malware.

Malicious software like CenterPOS do not work with EMV transactions, says Villeneuve. That’s because card data is stored in a microchip on the card that generates a unique code for every transaction, making it pointless for attackers to steal data at the POS.

Though the deadline to cut over to EMV smartcards and terminals ended in October, many retailers and merchants that accept payment cards are only still in the process of making the switch. Cybercriminals are anxious to use the closing window of opportunity -- resulting in a surge in attacks against POS systems.

"The cybercriminals are inspired by the successful, large breaches in the news and know that memory-scraping techniques will no longer work after the shift to chip-and-PIN,” Villeneuve said. But it will take some time for the shift to be complete. “So they are trying to take advantage of POS malware while they still can.” 

Jai Vijayan is a seasoned technology reporter with over 20 years of experience in IT trade journalism. He was most recently a Senior Editor at Computerworld, where he covered information security and data privacy issues for the publication. Over the course of his 20-year ... View Full Bio

Comment  | 
Print  | 
More Insights
Newest First  |  Oldest First  |  Threaded View
Christian Bryant
Christian Bryant,
User Rank: Ninja
2/1/2016 | 10:23:24 AM
Re: Unique Code
@Ryan - I was looking at a Java-based EMV card emulator recently.  You really should take a look, as they have example output on the wiki, including card risk management objects and key certificate modulus:


User Rank: Ninja
1/31/2016 | 11:12:03 PM
Unique Code
What is the code length and parameters generated during each transaction?
User Rank: Ninja
1/31/2016 | 11:10:39 PM
Hard data
What percentage of major retailers haven't switched over to EMV yet? 
Register for Dark Reading Newsletters
White Papers
Cartoon Contest
Write a Caption, Win a Starbucks Card! Click Here
Latest Comment: This comment is waiting for review by our moderators.
Current Issue
Security Operations and IT Operations: Finding the Path to Collaboration
A wide gulf has emerged between SOC and NOC teams that's keeping both of them from assuring the confidentiality, integrity, and availability of IT systems. Here's how experts think it should be bridged.
Flash Poll
New Best Practices for Secure App Development
New Best Practices for Secure App Development
The transition from DevOps to SecDevOps is combining with the move toward cloud computing to create new challenges - and new opportunities - for the information security team. Download this report, to learn about the new best practices for secure application development.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
Published: 2017-05-09
NScript in mpengine in Microsoft Malware Protection Engine with Engine Version before 1.1.13704.0, as used in Windows Defender and other products, allows remote attackers to execute arbitrary code or cause a denial of service (type confusion and application crash) via crafted JavaScript code within ...

Published: 2017-05-08
unixsocket.c in lxterminal through 0.3.0 insecurely uses /tmp for a socket file, allowing a local user to cause a denial of service (preventing terminal launch), or possibly have other impact (bypassing terminal access control).

Published: 2017-05-08
A privilege escalation vulnerability in Brocade Fibre Channel SAN products running Brocade Fabric OS (FOS) releases earlier than v7.4.1d and v8.0.1b could allow an authenticated attacker to elevate the privileges of user accounts accessing the system via command line interface. With affected version...

Published: 2017-05-08
Improper checks for unusual or exceptional conditions in Brocade NetIron 05.8.00 and later releases up to and including 06.1.00, when the Management Module is continuously scanned on port 22, may allow attackers to cause a denial of service (crash and reload) of the management module.

Published: 2017-05-08
Nextcloud Server before 11.0.3 is vulnerable to an inadequate escaping leading to a XSS vulnerability in the search module. To be exploitable a user has to write or paste malicious content into the search dialogue.

Dark Reading Radio
Archived Dark Reading Radio
In past years, security researchers have discovered ways to hack cars, medical devices, automated teller machines, and many other targets. Dark Reading Executive Editor Kelly Jackson Higgins hosts researcher Samy Kamkar and Levi Gundert, vice president of threat intelligence at Recorded Future, to discuss some of 2016's most unusual and creative hacks by white hats, and what these new vulnerabilities might mean for the coming year.