Your company's Security Operations Center (SOC) is currently detecting an ongoing DDoS attack against your network's file server. A cybersecurity analyst has identified forty internal workstations on the network conducting the attack against your network's file server. The cybersecurity analyst believes these internal workstations are infected with malware and places them into a quarantined network area. The analyst then submits a service desk ticket to have the workstations scanned and cleaned of the infection. What type of malware was the workstation likely a victim of based on the scenario provided?