Overview

overview

6

Static

static

1

WIN_STB-5....OD.exe

windows10-2004-x64

6

WIN_STB-5....OD.exe

windows11-21h2-x64

6

Analysis

  • max time kernel
    898s
  • max time network
    402s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    05/06/2026, 03:39

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General

  • Target
    WIN_STB-5.4.442.0.exe_PROD.exe
  • Size 93.8MB
  • Sample260605-d7neysay3v
  • SHA256 b7847398eaea7ac1be2a9c234dfd6ecf07543c76813668a8fac77957605c3cd0
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
6/10
defense_evasiondiscoveryransomware

Malware Config

Signatures

  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

    defense_evasion
  • Drops file in Program Files directory 29 IoCs
  • Drops file in Windows directory 18 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 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 36 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 6 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\WIN_STB-5.4.442.0.exe_PROD.exe
    "C:\Users\Admin\AppData\Local\Temp\WIN_STB-5.4.442.0.exe_PROD.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4276
    • C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\WIN_STB-5.4.442.0.exe_PROD.exe
      C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\WIN_STB-5.4.442.0.exe_PROD.exe /q"C:\Users\Admin\AppData\Local\Temp\WIN_STB-5.4.442.0.exe_PROD.exe" /tempdisk1folder"C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}" /IS_temp
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4504
      • C:\Windows\SysWOW64\MSIEXEC.EXE
        "C:\Windows\system32\MSIEXEC.EXE" /i "C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\NWEA Secure Testing Browser.msi" /l*v C:\Users\Admin\AppData\Local\Temp\LockdownBrowser.log SETUPEXEDIR="C:\Users\Admin\AppData\Local\Temp" SETUPEXENAME="WIN_STB-5.4.442.0.exe_PROD.exe"
        3⤵
        • Enumerates connected drives
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        PID:1476
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rmdir /s /q "C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}"
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2084
  • 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 WriteProcessMemory
    PID:4892
    • C:\Windows\syswow64\MsiExec.exe
      C:\Windows\syswow64\MsiExec.exe -Embedding 561510B38A65AAE0070FA944A1FDE16F C
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:1016
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4412
      • C:\Windows\syswow64\MsiExec.exe
        C:\Windows\syswow64\MsiExec.exe -Embedding 5A250A9FDF1DC22F578A7CE51D3AAE8D
        2⤵
        • System Location Discovery: System Language Discovery
        PID:732
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      PID:892

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e58967f.rbs
          • Path C:\Config.Msi\e58967f.rbs
          • Size 15KB
          • SHA256 b35a3fc96948448348516422f02d885736f1b8fa7dfe1553f5b2143b13a518db
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          NWEA Secure Testing Browser.exe
          • Path C:\Program Files (x86)\NWEA\NWEA Secure Testing Browser\NWEA Secure Testing Browser.exe
          • Size 309KB
          • SHA256 3baf19269b2c5bbe514a55dc2b030924365bc7103e545f00e29b095ca4877acd
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          LockdownBrowser.log
          • Path C:\Users\Admin\AppData\Local\Temp\LockdownBrowser.log
          • Size 89KB
          • SHA256 a2e4c950cfd30dd821b17154bed39034e23243ae3fc0c987bdeefee102f83b1c
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          MSI435D.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\MSI435D.tmp
          • Size 166KB
          • SHA256 c30c8a461175ae3240c7a835c9a4946a913a54e55f4b87f42b729c685a40448a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          0x0409.ini
          • Path C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\0x0409.ini
          • Size 21KB
          • SHA256 8b76df0ffc9a226b532b60936765b852b89780c6e475c152f7c320e085e43948
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          _ISMSIDEL.INI
          • Path C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\_ISMSIDEL.INI
          • Size 756B
          • SHA256 a76155050cfaa38cf2babf9ce18a946a696bc3445fcb9df4335a3b51b6bd3ec3
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          _ISMSIDEL.INI
          • Path C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\_ISMSIDEL.INI
          • Size 20B
          • SHA256 0a33c5dffabcf31a1f6802026e9e2eef4b285e57fd79d52fdcd98d6502d14b13
          • MD5 SHA1 SHA512
          Submit Download

          _ISMSIDEL.INI
          • Path C:\Users\Admin\AppData\Local\Temp\{B45FBC3B-1401-4FC7-B683-B82EE059458C}\_ISMSIDEL.INI
          • Size 676B
          • SHA256 17409592eb90afc8a9d5ab9261461d45c1059bbf60a02f9afaa76ce3e9b04e14
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          ~2CAB.tmp
          • Path C:\Users\Admin\AppData\Local\Temp\~2CAB.tmp
          • Size 5KB
          • SHA256 aabd6f7803cc8f65b2f16cf4a20b3d864e41efcb52b1c0222ee24bc104accd2b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          NewShortcut2_D49D4F2A42E745149F646DD045FA6CEE.exe
          • Path C:\Windows\Installer\{ff694045-5446-402f-8128-1462e26a7e6e}\NewShortcut2_D49D4F2A42E745149F646DD045FA6CEE.exe
          • Size 60KB
          • SHA256 07549d4c2306360c9a4146bbb5bf500d2d49e9850e7829f153dadb62e99e5026
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          metadata-2
          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 24.6MB
          • SHA256 5940d7f482bd3a7c560c1608d3f9c84a11cb34b69ecf478a9897c023906224bb
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          {27c9896f-28bb-45cf-ad4d-768a0be0a101}_OnDiskSnapshotProp
          • Path \??\Volume{b99e3a64-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{27c9896f-28bb-45cf-ad4d-768a0be0a101}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 6d30ce9b303cbddca8e260df3c8d1efad0cdc1be1cfdd6762f4ba38dda6ea2a8
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download