No, it's a shell intrinsic command. 
[D:\Program Files\4nt]rename /?
Rename files or subdirectories.

RENAME [/A:[[-]rhsda] /E /I"text" /NPQST] old_name... new_name
        /A:(ttribute select)    /P(rompt)
        /E (no error messages)  /Q(uiet)
        /I (match description)  /S(ubdirectory)
        /N(othing)              /T(otal)

[D:\Program Files\4nt]

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In reply to Re: Re: Re: changing file extensions by John M. Dlugosz
in thread changing file extensions by Anonymous Monk

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