Resubmissions

04/08/2026, 16:42

260804-t7ze8avflh

04/08/2026, 16:39

260804-t6ednaam6z8

Analysis

  • max time kernel
    164s
  • max time network
    163s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    04/08/2026, 16:39

General

  • Target
    winiso.exe
  • Size 6.7MB
  • Sample260804-t6ednaam6z
  • SHA256 338c439af0954b42d3cfd92811f06b5a639e3086b75d78d62c902d17595374a6
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 64 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 57 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 10 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\winiso.exe
    "C:\Users\Admin\AppData\Local\Temp\winiso.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:5524
    • C:\Program Files (x86)\WinISO Computing\WinISO\bin\mnt\wmnt.exe
      "C:\Program Files (x86)\WinISO Computing\WinISO\bin\mnt\wmnt.exe" /install
      2⤵
      • Drops file in Drivers directory
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4696
    • C:\Program Files (x86)\WinISO Computing\WinISO\bin\winiso.exe
      "C:\Program Files (x86)\WinISO Computing\WinISO\bin\winiso.exe" -install
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:2944
  • C:\Windows\system32\drivers\WinisoCDBus.sys
    system32\drivers\WinisoCDBus.sys
    1⤵
    • Executes dropped EXE
    PID:4348
  • C:\Program Files (x86)\WinISO Computing\WinISO\bin\winiso.exe
    "C:\Program Files (x86)\WinISO Computing\WinISO\bin\winiso.exe"
    1⤵
    • Executes dropped EXE
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1276
    • C:\Users\Admin\AppData\Local\WinISO Computing\WinISO\update_2318\bin\updater.exe
      "C:\Users\Admin\AppData\Local\WinISO Computing\WinISO\update_2318\bin\updater.exe" winavi_upd_20834
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:3544

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        aff.dat

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\Resources\aff.dat
        • Size 312B
        • SHA256 b4ae553a177904eaec83abc7856c20f0b3c7f272395de4817a3c97bb769fb5aa
        • MD5 SHA1 SHA512 TLSH

        meta.dat

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\Resources\meta.dat
        • Size 514B
        • SHA256 3715896ba56dc28de3c60cf74d3b6399cff342021c70f7bbc49e91f46fcf9046
        • MD5 SHA1 SHA512 TLSH

        LIBEAY32.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\LIBEAY32.dll
        • Size 1.1MB
        • SHA256 ec796c58fa7c46d51eb0e81039cff02ea62c381cbc0477ae283e0da6c3ca0046
        • MD5 SHA1 SHA512 SSDEEP TLSH

        MSVCP100.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\MSVCP100.dll
        • Size 411KB
        • SHA256 b2ad109c15eaa92079582787b7772ba0a2f034f7d075907ff87028df0eaea671
        • MD5 SHA1 SHA512 SSDEEP TLSH

        QtCore4.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\QtCore4.dll
        • Size 2.5MB
        • SHA256 74ae26018084791df388f702063519cdaec65b22675cf57c96281eb95b63d119
        • MD5 SHA1 SHA512 SSDEEP TLSH

        QtGui4.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\QtGui4.dll
        • Size 8.2MB
        • SHA256 76b3292006d9e9f0adb21eda44de5a10d76833162a138cdade2a2fad8e4d60f3
        • MD5 SHA1 SHA512 SSDEEP TLSH

        QtNetwork4.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\QtNetwork4.dll
        • Size 1.0MB
        • SHA256 d8d16f347d54333e74a5dc7ee64af89010251605f1968de1d2ef7c5983892e76
        • MD5 SHA1 SHA512 SSDEEP TLSH

        baseio.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\baseio.dll
        • Size 48KB
        • SHA256 5d1242a1ef8e05946ea60f838e221ddc2a4d504bc33fa13d44704fc43a0f33ce
        • MD5 SHA1 SHA512 SSDEEP TLSH

        core.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\core\core.dll
        • Size 119KB
        • SHA256 c2d495fd8b2f1a7f5bc25b9a592880b5ef728b43fea8f6bd8e23278f8f7a9733
        • MD5 SHA1 SHA512 SSDEEP TLSH

        cdfs.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\filesystem\cdfs.dll
        • Size 84KB
        • SHA256 892ae7bdadd0f1172f0c61e8715faf05e6aa0b0b8d3c4414999a01ed891b0961
        • MD5 SHA1 SHA512 SSDEEP TLSH

        hfsplus.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\filesystem\hfsplus.dll
        • Size 50KB
        • SHA256 23f599058e32ed2fa906155ca0d5b3866943bb25eb32d384ddf4d71901980740
        • MD5 SHA1 SHA512 SSDEEP TLSH

        udf.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\filesystem\udf.dll
        • Size 61KB
        • SHA256 33d5e877f0a354bdebf9e1bbdbb14be3a20dc0c864408ca8cd4e1e8ac6fe4b3d
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ccd.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\format\ccd.dll
        • Size 33KB
        • SHA256 edfeb462b279dc221aaa11f10f97c504470fa9e527ad563c2faf645ece81f4e4
        • MD5 SHA1 SHA512 SSDEEP TLSH

        cue.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\format\cue.dll
        • Size 26KB
        • SHA256 469c8683066865c1715ce9e6675afece8e06abfc87edb5ac83fe89d22d3a9c77
        • MD5 SHA1 SHA512 SSDEEP TLSH

        drive.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\format\drive.dll
        • Size 24KB
        • SHA256 8971be20966f83f1a011fceae010bb2ff33713ed15fe1bf112dd981f0569d1ec
        • MD5 SHA1 SHA512 SSDEEP TLSH

        iso.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\format\iso.dll
        • Size 14KB
        • SHA256 cbf2b2d80fcda644914449d6f9dde64827d70988724f2631f6e51a12cd06b4cb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        mds.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\format\mds.dll
        • Size 29KB
        • SHA256 99a36a6b4772b138f141e8cdedb124f63fda57376c44b1ba0c94034df3560ef9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        nrg.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\format\nrg.dll
        • Size 22KB
        • SHA256 b43916e92710d3006b98da2a5684c68fd528e1bb498ffa750941465266dc0834
        • MD5 SHA1 SHA512 SSDEEP TLSH

        WinisoCDBus64.sys

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\mnt\WinisoCDBus64.sys
        • Size 199KB
        • SHA256 ff4725171c6d4bde6b258fd19949c7d624f1f8693a26ab1e2e04103fc46484cb
        • MD5 SHA1 SHA512 SSDEEP TLSH

        wmnt.exe

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\mnt\wmnt.exe
        • Size 101KB
        • SHA256 549fa43526e6ad5327af7e2643beb30fc3c42427cdcade103ec29bb3aad33fee
        • MD5 SHA1 SHA512 SSDEEP TLSH

        msvcr100.dll

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\msvcr100.dll
        • Size 755KB
        • SHA256 8793353461826fbd48f25ea8b835be204b758ce7510db2af631b28850355bd18
        • MD5 SHA1 SHA512 SSDEEP TLSH

        winiso.exe

        • Path C:\Program Files (x86)\WinISO Computing\WinISO\bin\winiso.exe
        • Size 1.1MB
        • SHA256 fb1446cbaa1d0d423f0834ae1f39b4287943907266a652b41d54b236015cbcdf
        • MD5 SHA1 SHA512 SSDEEP TLSH

        ShellExecAsUser.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsmAD2F.tmp\ShellExecAsUser.dll
        • Size 8KB
        • SHA256 fd16be229c013ba83d757b88974f9c1f01834eb8158e32f68c8042bdd156077a
        • MD5 SHA1 SHA512 SSDEEP TLSH

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsmAD2F.tmp\System.dll
        • Size 11KB
        • SHA256 03cd57ab00236c753e7ddeee8ee1c10839ace7c426769982365531042e1f6f8b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        nsDialogs.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsmAD2F.tmp\nsDialogs.dll
        • Size 9KB
        • SHA256 2bee549b2816ba29f81c47778d9e299c3a364b81769e43d5255310c2bd146d6e
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4348-182-0x0000000140000000-0x0000000140036000-memory.dmp