Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    16-02-2023 16:31

General

  • Target

    tmp.exe

  • Size

    866KB

  • MD5

    7b1f03fb9936f72548c7d006eabfc310

  • SHA1

    66aef8129896c6e6dd36b2e3abadbbce7b4d51d6

  • SHA256

    e12d85aa606d45cdbb85982f5ea17d5c0b6f030dbbb30275ec0803f37c188a5b

  • SHA512

    f20b8348e0eb82f61fbaa98ce771f260bbbd22e1cf6018a49338d457b0ab5213a853e81cb4e4760c2c167a04279c6772a5076849dc89120fe31e05bb21f8c403

  • SSDEEP

    24576:b2c2oVEmdgUwB4qM742kyxzDL/KHYAmCS:ac2osByEby5DL/Dr

Malware Config

Signatures

  • Generic Chinese Botnet

    A botnet originating from China which is currently unnamed publicly.

  • Chinese Botnet payload 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 7 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in System32 directory 4 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 33 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Loads dropped DLL
    • Enumerates connected drives
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Program Files directory
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: RenamesItself
    • Suspicious use of WriteProcessMemory
    PID:1292
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c md C:\windowss64
      2⤵
        PID:1348
      • C:\windowss64\computer.exe
        "C:\windowss64\computer.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        PID:1592
        • C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
          "C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe"
          3⤵
          • Executes dropped EXE
          • Enumerates connected drives
          • Drops file in Program Files directory
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          PID:1648
        • C:\ProgramData\Synaptics\Synaptics.exe
          "C:\ProgramData\Synaptics\Synaptics.exe" InjUpdate
          3⤵
          • Executes dropped EXE
          PID:1604
    • C:\Program Files (x86)\Microsoft Qnrddd\Ygkqiuu.exe
      "C:\Program Files (x86)\Microsoft Qnrddd\Ygkqiuu.exe"
      1⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Modifies data under HKEY_USERS
      • Suspicious use of WriteProcessMemory
      PID:1656
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c md C:\windowss64
        2⤵
          PID:568
      • C:\Program Files (x86)\Imsossm.exe
        "C:\Program Files (x86)\Imsossm.exe"
        1⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Modifies data under HKEY_USERS
        • Suspicious use of WriteProcessMemory
        PID:1680
        • C:\Program Files (x86)\Imsossm.exe
          "C:\Program Files (x86)\Imsossm.exe" Win7
          2⤵
          • Executes dropped EXE
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:1268

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      Query Registry

      2
      T1012

      Peripheral Device Discovery

      1
      T1120

      System Information Discovery

      3
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\Imsossm.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • C:\Program Files (x86)\Imsossm.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • C:\Program Files (x86)\Imsossm.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • C:\Program Files (x86)\Microsoft Qnrddd\Ygkqiuu.exe
        Filesize

        866KB

        MD5

        7b1f03fb9936f72548c7d006eabfc310

        SHA1

        66aef8129896c6e6dd36b2e3abadbbce7b4d51d6

        SHA256

        e12d85aa606d45cdbb85982f5ea17d5c0b6f030dbbb30275ec0803f37c188a5b

        SHA512

        f20b8348e0eb82f61fbaa98ce771f260bbbd22e1cf6018a49338d457b0ab5213a853e81cb4e4760c2c167a04279c6772a5076849dc89120fe31e05bb21f8c403

      • C:\Program Files (x86)\Microsoft Qnrddd\Ygkqiuu.exe
        Filesize

        866KB

        MD5

        7b1f03fb9936f72548c7d006eabfc310

        SHA1

        66aef8129896c6e6dd36b2e3abadbbce7b4d51d6

        SHA256

        e12d85aa606d45cdbb85982f5ea17d5c0b6f030dbbb30275ec0803f37c188a5b

        SHA512

        f20b8348e0eb82f61fbaa98ce771f260bbbd22e1cf6018a49338d457b0ab5213a853e81cb4e4760c2c167a04279c6772a5076849dc89120fe31e05bb21f8c403

      • C:\ProgramData\Synaptics\Synaptics.exe
        Filesize

        754KB

        MD5

        310a7ff41f6633132e6c2bc25e51e567

        SHA1

        5f687df8cc3185ed68d77d0e05502c2eb308c5c8

        SHA256

        d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab

        SHA512

        ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980

      • C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • C:\Users\Admin\AppData\Local\Temp\._cache_computer.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • C:\windowss64\computer.exe
        Filesize

        1.1MB

        MD5

        be689578752179e22bf915dbcf4f7520

        SHA1

        e798e703bfb90707a2872b51da73f32af566aedb

        SHA256

        de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

        SHA512

        89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

      • C:\windowss64\computer.exe
        Filesize

        1.1MB

        MD5

        be689578752179e22bf915dbcf4f7520

        SHA1

        e798e703bfb90707a2872b51da73f32af566aedb

        SHA256

        de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

        SHA512

        89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

      • \ProgramData\Synaptics\Synaptics.exe
        Filesize

        754KB

        MD5

        310a7ff41f6633132e6c2bc25e51e567

        SHA1

        5f687df8cc3185ed68d77d0e05502c2eb308c5c8

        SHA256

        d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab

        SHA512

        ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980

      • \ProgramData\Synaptics\Synaptics.exe
        Filesize

        754KB

        MD5

        310a7ff41f6633132e6c2bc25e51e567

        SHA1

        5f687df8cc3185ed68d77d0e05502c2eb308c5c8

        SHA256

        d1425edf482717cb64db2a36357866045b0c6306d919296591ffc9bc45d680ab

        SHA512

        ee9b3114cb37e52793bccdf20a27158f5def67ed9c7d8eb772e1deaf5d5f9a0030e847dea40bb320637f29508f1be2a49c3095460a6fd3afbc3bca196f642980

      • \Users\Admin\AppData\Local\Temp\._cache_computer.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • \Users\Admin\AppData\Local\Temp\._cache_computer.exe
        Filesize

        400KB

        MD5

        20beeb0a82adcce3a58372804acc46be

        SHA1

        c579d9017d2c8298fe075ff5c05963901330e72a

        SHA256

        d1aaa7e7d31bf648c57f0c721d6f6ee2b17395b4e09d9d89a4f6dbd5dd706a8e

        SHA512

        7636912ba6323063cefb7fac5a6cff9e44a474e452a4d5d4f77ef88968266de184c68112e3667585e02e811781f51ee020e61ce820e3f9a38dcfdf30e6d522bd

      • \windowss64\computer.exe
        Filesize

        1.1MB

        MD5

        be689578752179e22bf915dbcf4f7520

        SHA1

        e798e703bfb90707a2872b51da73f32af566aedb

        SHA256

        de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

        SHA512

        89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

      • \windowss64\computer.exe
        Filesize

        1.1MB

        MD5

        be689578752179e22bf915dbcf4f7520

        SHA1

        e798e703bfb90707a2872b51da73f32af566aedb

        SHA256

        de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

        SHA512

        89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

      • \windowss64\computer.exe
        Filesize

        1.1MB

        MD5

        be689578752179e22bf915dbcf4f7520

        SHA1

        e798e703bfb90707a2872b51da73f32af566aedb

        SHA256

        de8c1aa37dd523e0699a10be71185f7a8ac1cde972d04107068f49250ef7317e

        SHA512

        89c95b387e566dfaf3f6a4ab60ee6e24d2574dd3802458e4d8f15e4c44136ac54c5b3a53addc1d28748656320050ee735fa2e8e5c57cdfb53fbdddc6eb586da8

      • memory/568-9406-0x0000000000000000-mapping.dmp
      • memory/1268-9415-0x0000000000000000-mapping.dmp
      • memory/1292-482-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-523-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-485-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-486-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-484-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-483-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp
        Filesize

        8KB

      • memory/1292-481-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-489-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-490-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-488-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-487-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-491-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-495-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-496-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-494-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-493-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-492-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-500-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-501-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-499-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-498-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-497-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-503-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-504-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-502-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-506-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-505-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-508-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-507-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-510-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-509-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-512-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-511-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-513-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-518-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-517-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-516-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-514-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-515-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-524-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-476-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-522-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-521-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-520-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-519-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-1455-0x0000000000530000-0x0000000000630000-memory.dmp
        Filesize

        1024KB

      • memory/1292-1457-0x0000000001EA0000-0x0000000002021000-memory.dmp
        Filesize

        1.5MB

      • memory/1292-56-0x0000000076B20000-0x0000000076B67000-memory.dmp
        Filesize

        284KB

      • memory/1292-4615-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-4616-0x0000000000400000-0x0000000000525000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-4617-0x0000000000530000-0x0000000000630000-memory.dmp
        Filesize

        1024KB

      • memory/1292-477-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-463-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-478-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-480-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-479-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-462-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-475-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-471-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-472-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-473-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-474-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-466-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-470-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-468-0x0000000000400000-0x0000000000525000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-4641-0x0000000000400000-0x0000000000525000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-469-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-467-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-464-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1292-465-0x00000000021C0000-0x00000000022D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1348-4614-0x0000000000000000-mapping.dmp
      • memory/1592-4620-0x0000000000000000-mapping.dmp
      • memory/1604-4635-0x0000000000000000-mapping.dmp
      • memory/1648-4627-0x0000000000000000-mapping.dmp
      • memory/1656-6226-0x0000000001D80000-0x0000000001F01000-memory.dmp
        Filesize

        1.5MB

      • memory/1656-6224-0x0000000000240000-0x0000000000340000-memory.dmp
        Filesize

        1024KB

      • memory/1656-9404-0x00000000020C0000-0x00000000021D1000-memory.dmp
        Filesize

        1.1MB

      • memory/1656-5081-0x0000000000400000-0x0000000000525000-memory.dmp
        Filesize

        1.1MB

      • memory/1656-9407-0x0000000000400000-0x0000000000525000-memory.dmp
        Filesize

        1.1MB

      • memory/1656-9408-0x0000000000240000-0x0000000000340000-memory.dmp
        Filesize

        1024KB