Tetrade

Tetrade is a collective term for four prominent banking trojan families, namely Guildma, Javali, Melcoz, and Grandoreiro, that were created, developed, and spread by Brazilian cybercriminals. These malware variants have evolved to operate on a global scale, posing significant threats to financial institutions and their customers. Malware, including Tetrade, is harmful software designed to infiltrate and damage computer systems, often without the user's knowledge. It can be propagated through suspicious downloads, emails, or websites, with capabilities ranging from disrupting operations to stealing personal information or holding data hostage for ransom. Grandoreiro, a well-known component of the Tetrade group, is a Brazilian banking trojan that enables threat actors to carry out fraudulent banking operations. This malicious software uses the victim’s computer to bypass the security measures of banking institutions, allowing unauthorized transactions to occur. Researchers have thoroughly analyzed Grandoreiro, providing valuable insights into its operation and potential countermeasures. In 2024, the most prevalent families within the Tetrade group were Guildma, Javali, Melcoz, and Grandoreiro. Another malware variant named Coyote has also been identified, exhibiting behavior similar to those in the Tetrade family, suggesting it too may be a Brazilian banking Trojan. The continuous evolution and spread of these trojans highlight the necessity for robust cybersecurity measures, particularly for financial institutions and their clients.