Malware
SoundBill
According to Cisco Talos, this is a customized shellcode loader that has been observed to stage Mimikatz and CobaltStrike.
SoundBill is a Windows malware family.
Background
Cisco Talos describes SoundBill as a tailored shellcode loader that has been seen deploying Mimikatz and CobaltStrike.
Source: Malpedia (Fraunhofer FKIE).