Researchers track financial cyberattacks in Africa and spot new ransomware group

Cybersecurity researchers have identified a series of cyberattacks targeting African financial institutions since at least July 2023. The campaign, attributed to a threat cluster named CL-CRI-1014 by Palo Alto Networks Unit 42, involves using open-source and publicly available tools to maintain unauthorised access to compromised systems.

According to Unit 42, ‘CL’ stands for ‘cluster’ and ‘CRI’ refers to ‘criminal motivation.’ The threat actor is believed to be operating as an initial access broker (IAB), seeking to obtain entry into networks and sell access to other cybercriminals on underground forums.

Researchers noted that the group employs methods to evade detection by spoofing legitimate software, including copying digital signatures and using application icons from Microsoft Teams, Palo Alto Networks Cortex, and VMware Tools to disguise malicious payloads. Tools deployed include PoshC2 for command-and-control, Chisel for network tunnelling, and Classroom Spy for remote access.

While the initial intrusion vector remains unclear, once access is achieved, the attackers reportedly use MeshCentral Agent and Classroom Spy to control machines, with Chisel deployed to bypass firewalls. PoshC2 is propagated across Windows hosts and persisted through various techniques, including services, scheduled tasks, and startup shortcuts. In some cases, stolen user credentials were used to set up proxies via PoshC2.

Trustwave SpiderLabs has reported the emergence of a new ransomware group named Dire Wolf, which has claimed 16 victims across multiple countries, including the United States, India, and Italy, with primary targets in the technology, manufacturing, and financial sectors.

Dire Wolf ransomware was developed in Golang. It includes disabling system logging, terminating a predefined list of services and applications, and deleting shadow copies to hinder recovery. Although details about the group’s initial access or lateral movement techniques are unknown, Trustwave advises organisations to maintain standard cybersecurity practices and monitor for the techniques observed during the analysis.

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