Security Experts:

Connect with us

Hi, what are you looking for?



New ‘Chaes’ Malware Targets Latin American E-Commerce Users

Cybereason Nocturnus security researchers have identified an active campaign focused on the users of a large e-commerce platform in Latin America.

Cybereason Nocturnus security researchers have identified an active campaign focused on the users of a large e-commerce platform in Latin America.

Dubbed Chaes, the new threat is a multi-stage piece of malware designed to harvest sensitive information such as login credentials, credit card numbers, and additional financial details. Chaes’ operators mainly focus on Brazilians who use the MercadoLivre e-commerce platform.

The malware has been designed to specifically target MercadoLivre’s payment page MercadoPago and harvest customer financial information from it. Chaes’ final payload is a Node.js information stealer.

In addition to stealing information from the victim’s browser, Chaes was designed to take screenshots, hook and monitor the Chrome browser, and collect other user information from the infected hosts.

The infection process, which begins with a phishing email carrying a .docx file, consists of multiple stages and includes the use of a template injection attack and LoLbins. Legitimate software, open source tools, and fileless parts that help the malware remain stealthy are also employed.

Still under development, the malware was created using several programming languages, including .NET , Delphi, JavaScript, VBScript, and Node.js.

Chaes, the security researchers say, is rapidly evolving, with several variants observed over the recent months. The malware operators have improved encryption and expanded the functionality of the final Node.js module, but maintain their focus on the MercadoLivre and MercadoPago websites.

“Threat actors put a great deal of time, resources and effort into choosing their targets for criminal operations such as this, and a return on their investment is always top of mind. Undoubtedly, the dramatic increase in the volume of online shopping transactions has not escaped their notice, so it’s not surprising to see new and ever-more sophisticated malware variants emerging to take advantage of the current circumstances,” said Lior Div, Cybereason co-founder and CEO.

Related: Inside the Rising Cybercrime Threat in Latin America

Related: ‘Tetrade’ Brazilian Banking Trojans Go International

Related: Mobile Payment Fraud on the Rise

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Expert Insights

Related Content


Zendesk is informing customers about a data breach that started with an SMS phishing campaign targeting the company’s employees.


The release of OpenAI’s ChatGPT in late 2022 has demonstrated the potential of AI for both good and bad.


The FBI dismantled the network of the prolific Hive ransomware gang and seized infrastructure in Los Angeles that was used for the operation.

Malware & Threats

Microsoft plans to improve the protection of Office users by blocking XLL add-ins from the internet.


A new study by McAfee and the Center for Strategic and International Studies (CSIS) named a staggering figure as the true annual cost of...


A recently disclosed vBulletin vulnerability, which had a zero-day status for roughly two days last week, was exploited in a hacker attack targeting the...

Application Security

PayPal is alerting roughly 35,000 individuals that their accounts have been targeted in a credential stuffing campaign.


CISA, NSA, and MS-ISAC issued an alert on the malicious use of RMM software to steal money from bank accounts.