That filename appears to be related to — specifically, a third-party, cracked, or modified offline client for its Zombies or Multiplayer modes (the "SP" might stand for Single Player, "MP" for Multiplayer, "ZM" for Zombies). Strings like this are often associated with pirated software , non-official private servers , or potentially malicious repacks distributed through forums, torrents, or file-sharing sites.
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