From The Jargon File (version 4.4.7, 29 Dec 2003) :
some random X adj. Used to indicate a member of class X, with the implication that Xs are interchangeable. ?I think some random cracker tripped over the guest timeout last night.? See also J. Random.From The Free On-line Dictionary of Computing (30 December 2018) :
some random XUsed to indicate a member of class X, with the implication that Xs are interchangeable. "I think some random cracker tripped over the guest timeout last night." See also J. Random. [{Jargon File] (1995-03-03)