M4B004 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
L8Y012 manifest for SAS Threaded Kernel Core Routines 9.4_M8
M4A004 manifest for SAS/SECURE 9.41_M5
L9M003 manifest for Threaded Kernel IOM 9.4_M8