variety of gameplay changes, ranging from new blocks, items, and mobs to entire arrays of mechanisms. The modding community is responsible for a substantial supply of mods from ones that enhance gameplay, such as minimaps, waypoints, and durability counters, to ones that add to the game elements from other video games and media. While a variety of mod frameworks were independently developed by reverse engineering the code, Mojang has also enhanced vanilla Minecraft with official frameworks for modification, allowing the production of community-created resource packs, which alter certain game elements including textures and sounds. Players can also create their own "maps" (custom world save files) which often contain specific rules, challenges, puzzles and quests, and share them for others to play. Mojang added an adventure mode in August 2012 and "command blocks" in October 2012, which were created specially for custom maps in Java Edition. Data packs, introduced in version 1.13 of the Java Edition, allow further customization, including the ability to add new advancements, dimensions, functions, loot tables, predicates, recipes, structures, tags, world generation settings, and biomes‌. The Xbox 360 Edition supports downloadable content, which is available to purchase via the Xbox Games Store; these content packs usually contain additional character skins. It later received support for texture packs in its twelfth title update while introducing "mash-up packs", which combines texture packs with skin packs and changes to the game's sounds, music and user interface. The first mash-up pack (and by extension, the first texture pack) for the Xbox 360 Edition was released on 4 September 2013, and was themed after the Mass Effect franchise. Unlike Java Edition, however, the Xbox 360 Edition does not support player-made mods or custom maps. A cross-promotional resource pack based on the Super Mario franchise by Nintendo was released for the Wii U Edition worldwide on 17 May 2016. A mash-up pack based on Fallout was announced for release on the Wii U Edition. In April 2018, malware was discovered in several downloadable user-made Minecraft skins for use with the Java Edition of the game. Avast stated that nearly 50,000 accounts were infected, and when activated, the malware would attempt to reformat the user's hard drive. Mojang promptly patched the issue, and released a statement stating that "the code would not be run or read by the game itself", and would only run when the image containing the skin itself was opened. In