While stalking its target, GruesomeLarch performed credential-stuffing attacks that compromised the passwords of several accounts on a web service platform used by the organization's employees. Two-factor authentication enforced on the platform, however, prevented the attackers from compromising the accounts. So GruesomeLarch found devices in physically adjacent locations, compromised them, and used them to probe the target’s Wi-Fi network. It turned out credentials for the compromised web servi...