Malware
VBREVSHELL
According to Mandiant, VBREVSHELL is a VBA macro that spawns a reverse shell relying exclusively on Windows API calls.
VBREVSHELL is a VBScript malware family.
Background
Mandiant reports that VBREVSHELL is a VBA macro that creates a reverse shell using nothing but Windows API calls.
Source: Malpedia (Fraunhofer FKIE).