Overview

overview

7

Static

static

3

fx-991ES P...00.exe

windows10-2004-x64

7

fx-991ES P...00.exe

windows11-ltsc_2024-x64

7

Analysis

  • max time kernel
    150s
  • max time network
    130s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/10/2026, 04:10

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General

  • Target
    fx-991ES PLUS C Emulator Ver.4.00.exe
  • Size 13.5MB
  • Sample261002-ert38stfjd
  • SHA256 78a5b28f586fe097571973b9adb73194f51af87d9d7f6bb51338688dcb1e3984
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
discoveryransomware

Malware Config

Signatures

  • Loads dropped DLL 4 IoCs
  • Enumerates connected drives 3 TTPs 47 IoCs

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

  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows directory 45 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

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

    discovery
  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 24 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\fx-991ES PLUS C Emulator Ver.4.00.exe
    "C:\Users\Admin\AppData\Local\Temp\fx-991ES PLUS C Emulator Ver.4.00.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:480
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe /i C:\Users\Admin\AppData\Local\Temp\MSI63E0.tmp
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SetWindowsHookEx
      PID:5116
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4688
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 3F2BCFA224045F23AFDF110A120B56CE C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      PID:4404
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4136
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 477DF18C691D7C4CFB45C0FC0E924B5A
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        PID:4144
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:1072

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e5a3cad.rbs
          • Path C:\Config.Msi\e5a3cad.rbs
          • Size 122KB
          • SHA256 e8436da5ab16eea8254acad7f2eb052bf618ff1253f26dde4e468c619ce0ec41
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          fx-991ES PLUS C Emulator.exe
          • Path C:\Program Files (x86)\CASIO\fx-ES PLUS Emulator Ver. 4\fx-991ES PLUS C Emulator\fx-991ES PLUS C Emulator.exe
          • Size 1.3MB
          • SHA256 0aea6f4ed88396a974374ebc0e0ab0cfa5b78f02c6a0961fda86c69ea15013b3
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          DLL_{5A63D248-9EAC-4C46-93CC-0D2E98AE61E0}.ini
          • Path C:\Users\Admin\AppData\Local\Temp\DLL_{5A63D248-9EAC-4C46-93CC-0D2E98AE61E0}.ini
          • Size 698B
          • SHA256 e41e1c490aab4995f603e7d35c8e2a2c368bfceda2ca8e208dcf02ade4afe8eb
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          MSI63E0.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\MSI63E0.tmp
          • Size 13.4MB
          • SHA256 98c2078cad4e01e17099b353a6a3b204adc2beead904a37b81ca4d1667227fe6
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSI6BFF.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\MSI6BFF.tmp
          • Size 217KB
          • SHA256 16adf43e64af3ecc46a9460af85926446bc2aa73dc76ba9b1d7900ef67de9bc7
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSI6E71.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\MSI6E71.tmp
          • Size 125KB
          • SHA256 b32687eaaad888410718875dcbff9f6a552e29c4d76af33e06e59859e1054081
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          NewShortcut1_36E63E01B8E5433C84B33DD3E0EC77B8.exe
          • Path C:\Windows\Installer\{5A63D248-9EAC-4C46-93CC-0D2E98AE61E0}\NewShortcut1_36E63E01B8E5433C84B33DD3E0EC77B8.exe
          • Size 332KB
          • SHA256 9b2ebb8fe919f1eecd29f5c4abe56808df5c5fb8c57bebf9fcfa183922b4d02b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          metadata-2
          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 07520deeb9fe8e4055bf8c8a4ef42f6db677ff988029a9c5e5c335070740f082
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          {e62eead2-43ed-48d8-b589-11533b2911eb}_OnDiskSnapshotProp
          • Path \??\Volume{af02990b-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{e62eead2-43ed-48d8-b589-11533b2911eb}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 cd6d2c57e0cf46d9bf87f9e74aaeb61d203609b229a67c8e1d6b550106c6bd4c
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download