Malware
B0
According to Porthas, this is a ransomware written in Golang, using a time-based kill switch to limit its execution.
B0 is a Windows malware family.
Background
Porthas characterizes this as a Golang-based ransomware that incorporates a time-based kill switch to restrict how long it will run.
Source: Malpedia (Fraunhofer FKIE).