and from the comments on that blog:
> The code your referring to .. the unknown c++ looks like the older IBM compilers found in OS400 SYS38 and the oldest sys36.
> The C++ code was used to write the tcp/ip stack for the operating system and all of the communications. The protocols used were the following x.21(async) all modes, Sync SDLC, x.25 Vbiss5 10 15 and 25. CICS. RSR232. This was a very small and powerful communications framework. The IBM system 36 had only 300MB hard drive and one megabyte of memory,the operating system came on diskettes.
> This would be very useful in this virus. It can track and monitor all types of communications. It can connect to everything and anything.