I took a look at Guy's diary entry from yesterday. This malicious document contains macros that launch a PowerShell command.
Like it is often the case with such documents, the PowerShell command will download and execute an executable: MD5 e2d5d1bf5d69a942d99c8ea45fe28ac2.
The PowerShell command is encoded and stored in Form1 objects:
Feb 26th 2017
2 years ago