ESET researchers have published an in-depth analysis of the activity of the Evilnum cybercrime group, the APT (advanced persistent threat) group behind the Evilnum malware.
According to ESET telemetry data, the Evilnum team has focused its attacks on financial technology companies. Most targets are in the European Union and the United Kingdom, however, ESET has identified other attacks in Australia and Canada.
The Evilnum Group closely monitors its candidate targets to gather financial information about the company and its customers.
"While Evilnum malware has been detected 'in the wild' since at least 2018, the information that has been published about the team behind the malware and how it works is minimal," said Matias Porolli, ESET researcher who leads research for the Evilnum group. "All of the tools and infrastructure it uses have evolved and now consist of a combination of improvised malware and tools purchased from Golden Chickens, the Malware-as-a-Service (MaaS) malware provider whose groups include malicious customers. FIN6 and Cobalt Group "he adds.
Evilnum steals sensitive information, credit card and address information and identity information, spreadsheets and documents with customer lists, investment and transaction documents, software licenses and credentials for trading software and platforms, email information, and other data. The team has also gained access to information related to IT infrastructure, such as VPN configurations.
"The team approaches its targets with phishing emails that contain a link to a .zip file hosted on Google Drive. This file contains many shortcut files that extract and execute a malicious item while displaying a bait document, ”explains Porolli.
These documents appear to be authentic, and are constantly being collected during the group's malicious operations as they try to reach new victims. The Evilnum team targets technical support agents and account managers, who regularly receive ID and credit card documents from their customers.
As with most malware, commands can be sent to Evilnum malware. Among other things, there are commands for collecting and sending passwords stored in Google Chrome, collecting and sending Google Chrome cookies, downloading screenshots, stopping malware, and removing them.
"Evilnum bases its operation on important infrastructures, which include several different servers for different forms of communication," concludes Porolli.
For more technical details about Evilnum malware and the APT team, visit related blogpost in WeLiveSecurity.