| | | KasperAgent | [] | win.kasperagent | [] | 2017-07-11 | | | |
| | | Katz Stealer | [] | win.katz_stealer | [] | 2025-12-30 | | | |
| | | Kazuar | [] | win.kazuar | ['Turla'] | 2026-09-22 | | | |
| | | KazyLoader | [] | win.kazyloader | [] | 2022-03-08 | | | |
| | | KDC Sponge | [] | win.kdcsponge | [] | 2021-12-07 | | | |
| | | Kegotip | [] | win.kegotip | [] | 2022-02-14 | | | |
| | | Kelihos | [] | win.kelihos | [] | 2021-07-02 | | | |
| | | KerrDown | [] | win.kerrdown | ['APT32'] | 2021-02-25 | | | |
| | | Ketrican | [] | win.ketrican | ['Mirage'] | 2021-02-25 | | | |
| | | Ketrum | [] | win.ketrum | ['Mirage'] | 2020-08-12 | | | |
| | | KeyBoy | ['TSSL'] | win.keyboy | ['Pirate Panda'] | 2020-06-18 | | | |
| | | Keyhole | [] | win.keyhole | [] | 2025-12-11 | | | |
| | | APT3 Keylogger | [] | win.keylogger_apt3 | ['UPS'] | 2023-05-15 | | | |
| | | KEYMARBLE | [] | win.keymarble | ['Lazarus Group'] | 2024-11-29 | | | |
| | | KGH_SPY | [] | win.kgh_spy | [] | 2021-07-20 | | | |
| | | KHRAT | [] | win.khrat | ['DragonOK'] | 2022-11-15 | | | |
| | | Kikothac | [] | win.kikothac | [] | 2018-09-06 | | | |
| | | killada | [] | win.killada | [] | 2026-05-05 | | | |
| | | KillAV | ['BURNTCIGAR'] | win.killav | [] | 2026-09-22 | | | |
| | | KillDisk | [] | win.killdisk | ['Sandworm', 'TeleBots'] | 2026-09-24 | | | |
| | | Kimsuky | [] | win.kimsuky | ['Kimsuki', 'Kimsuky'] | 2025-08-15 | | | |
| | | Kingminer | [] | win.kingminer | [] | 2024-09-06 | | | |
| | | KINS | ['Kasper Internet Non-Security', 'Maple'] | win.kins | [] | 2018-11-08 | | | |
| | | KIVARS | [] | win.kivars | [] | 2021-04-06 | | | |
| | | KiwiStealer | [] | win.kiwistealer | ['HAZY TIGER'] | 2025-06-05 | | | |
| | | kkRAT | [] | win.kk_rat | [] | 2025-09-17 | | | |
| | | KleptoParasite Stealer | ['Joglog', 'Parasite'] | win.kleptoparasite_stealer | [] | 2020-02-16 | | | |
| | | KLRD | [] | win.klrd | ['Anunak'] | 2019-03-05 | | | |
| | | Knight | ['Cyclops'] | win.knight | [] | 2024-09-06 | | | |
| | | Knot | [] | win.knot | [] | 2021-01-04 | | | |
| | | MedusaLocker | ['AKO Ransomware', 'AKO Doxware', 'MedusaReborn'] | win.medusalocker | [] | 2026-05-27 | | | |
| | | MedusaHTTP | [] | win.medusa_http | [] | 2026-01-12 | | | |
| | | MegaCortex | [] | win.megacortex | [] | 2023-01-06 | | | |
| | | MeguminTrojan | [] | win.megumin | [] | 2022-08-28 | | | |
| | | MeltingClaw | [] | win.meltingclaw | [] | 2026-03-12 | | | |
| | | Meow | [] | win.meow | [] | 2023-05-26 | | | |
| | | Merdoor | [] | win.merdoor | [] | 2023-08-28 | | | |
| | | Mespinoza | ['pysa'] | win.mespinoza | [] | 2026-02-25 | | | |
| | | MetadataBin | ['Ransomware32'] | win.metadatabin | [] | 2020-10-29 | | | |
| | | Metaencryptor | [] | win.metaencryptor | [] | 2026-06-02 | | | |
| | | MetaStealer | [] | win.metastealer | ['UNC5537'] | 2026-07-31 | | | |
| | | Meterpreter | [] | win.meterpreter | [] | 2025-11-13 | | | |
| | | Mewsei | [] | win.mewsei | [] | 2016-04-19 | | | |
| | | MgBot | ['BLame', 'MgmBot', 'POCOSTICK'] | win.mgbot | [] | 2024-10-29 | | | |
| | | Miancha | [] | win.miancha | [] | 2017-05-21 | | | |
| | | Micrass | [] | win.micrass | [] | 2018-04-13 | | | |
| | | MicroBackdoor | [] | win.microbackdoor | ['Ghostwriter'] | 2022-08-05 | | | |
| | | Microcin | [] | win.microcin | [] | 2022-08-26 | | | |
| | | Mikoponi | [] | win.mikoponi | [] | 2019-10-13 | | | |
| | | MILKMAID | [] | win.milkmaid | ['APT 30'] | 2018-04-26 | | | |
| | | Milum | [] | win.milum | [] | 2021-07-09 | | | |
| | | mim221 | [] | win.mim221 | ['Operation Soft Cell'] | 2023-03-27 | | | |
| | | Mimic Ransomware | [] | win.mimic | [] | 2025-05-21 | | | |
| | | Mindware | [] | win.mindware | [] | 2022-06-09 | | | |
| | | MiniASP | [] | win.miniasp | ['Comment Crew'] | 2018-02-10 | | | |
| | | MINIBIKE | [] | win.minibike | [] | 2026-01-19 | | | |
| | | miniBlindingCan | ['AIRDRY.V2', 'EventHorizon'] | win.miniblindingcan | ['Lazarus Group'] | 2025-09-15 | | | |
| | | MiniBrowse | [] | win.minibrowse | [] | 2025-12-15 | | | |
| | | MINIBUS | [] | win.minibus | [] | 2024-04-29 | | | |
| | | MiniFast | [] | win.minifast | ['UNC1549'] | 2026-06-02 | | | |
| | | MiniPocket | [] | win.minipocket | ['Turla'] | 2024-12-09 | | | |
| | | miniTypeFrame | [] | win.minitypeframe | ['Lazarus Group'] | 2023-12-11 | | | |
| | | Mirage | [] | win.mirage | ['Mirage'] | 2020-10-02 | | | |
| | | MirageFox | [] | win.miragefox | ['Mirage'] | 2018-06-19 | | | |
| | | Mirai | [] | win.mirai | [] | 2026-09-22 | | | |
| | | MirrorKey | [] | win.mirrorkey | [] | 2023-02-17 | | | |
| | | Misfox | ['Dromedan', 'MixFox', 'ModPack'] | win.misfox | [] | 2024-06-05 | | | |
| | | Misha | [] | win.misha | [] | 2022-11-28 | | | |
| | | MISTCLOAK | ['HIUPAN'] | win.mistcloak | [] | 2023-09-08 | | | |
| | | MISTPEN | [] | win.mistpen | ['UNC2970'] | 2026-09-24 | | | |
| | | Miuref | [] | win.miuref | [] | 2016-04-19 | | | |
| | | MiyaRAT | [] | win.miya_rat | ['HAZY TIGER'] | 2025-06-05 | | | |
| | | MLTBackdoor | [] | win.mltbackdoor | [] | 2026-06-25 | | | |
| | | MMON | ['Kaptoxa'] | win.mmon | [] | 2022-01-05 | | | |
| | | MM Core | [] | win.mm_core | [] | 2017-04-06 | | | |
| | | Mocton | [] | win.mocton | [] | 2016-04-19 | | | |
| | | Mofksys | [] | win.mofksys | [] | 2021-06-16 | | | |
| | | Moker | [] | win.moker | [] | 2017-05-01 | | | |
| | | Mokes | [] | win.mokes | [] | 2020-03-09 | | | |
| | | Mole | [] | win.mole | [] | 2017-12-13 | | | |
| | | Molerat Loader | [] | win.molerat_loader | ['Molerats'] | 2022-02-09 | | | |
| | | Monero Miner | ['CoinMiner'] | win.monero_miner | [] | 2026-09-14 | | | |
| | | mongall | [] | win.mongall | ['Aoqin Dragon'] | 2025-09-01 | | | |
| | | MontysThree | ['MT3'] | win.montysthree | [] | 2020-10-12 | | | |
| | | MoonBounce | [] | win.moonbounce | ['APT41'] | 2022-05-29 | | | |
| | | MOONTAG | [] | win.moontag | [] | 2024-10-25 | | | |
| | | MoonWalk | ['CurveLast', 'SneakCross'] | win.moonwalk | ['APT41'] | 2024-11-04 | | | |
| | | MoonWind | [] | win.moonwind | [] | 2017-04-05 | | | |
| | | MoriAgent | [] | win.moriagent | ['MuddyWater'] | 2023-06-19 | | | |
| | | Moriya | [] | win.moriya | [] | 2025-05-22 | | | |
| | | Morpheus | ['HellCat'] | win.morpheus | [] | 2026-03-11 | | | |
| | | MortalKombat | [] | win.mortalkombat | [] | 2023-02-15 | | | |
| | | Mortis | [] | win.mortis | [] | 2024-02-05 | | | |
| | | Morto | [] | win.morto | [] | 2018-06-28 | | | |
| | | MosaicRegressor | [] | win.mosaic_regressor | [] | 2024-11-25 | | | |
| | | Mosquito | [] | win.mosquito | ['Turla'] | 2023-01-19 | | | |
| | | Mount Locker | ['DagonLocker', 'MountLocker', 'QuantumLocker'] | win.mount_locker | ['Vanilla Tempest'] | 2025-07-28 | | | |
| | | Moure | [] | win.moure | [] | 2016-04-19 | | | |
| | | mozart | [] | win.mozart | [] | 2023-05-26 | | | |
| | | MPKBot | ['MPK'] | win.mpkbot | ['Magic Hound', 'Rocket Kitten'] | 2019-02-17 | | | |