Analysis

  • max time kernel
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    07/11/2026, 21:49

General

  • Target
    BrowserTamer-6.3.2-win64.msi
  • Size 1.9MB
  • Sample261107-1pcbasf16j
  • SHA256 e4876eb35671376aa3a40db056563f6ca6c22b2d64b6afdcf8204100acba3c7c
  • MD5 SHA1 SHA512 SSDEEP TLSH

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.

  • Drops file in Windows directory 12 IoCs
  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Modifies registry class 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\BrowserTamer-6.3.2-win64.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    PID:4700
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:5292
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2492
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:3056

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          e59bec3.rbs

          • Path C:\Config.Msi\e59bec3.rbs
          • Size 12KB
          • SHA256 70ff000b966ebf1fde4c06775160f95d9a034bd34015819ca268b5c8cbf5ca4e
          • MD5 SHA1 SHA512 SSDEEP TLSH

          e59bec4.msi

          • Path C:\Windows\Installer\e59bec4.msi
          • Size 1.9MB
          • SHA256 e4876eb35671376aa3a40db056563f6ca6c22b2d64b6afdcf8204100acba3c7c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          metadata-2

          • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
          • Size 26.1MB
          • SHA256 6883533a118dab926864f4d063c0126c9992d85b87170b75157c2cb621df06d3
          • MD5 SHA1 SHA512 SSDEEP TLSH

          {6691dd72-7d7e-465b-aa1c-a5605ee59ea4}_OnDiskSnapshotProp

          • Path \??\Volume{9cfaea72-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{6691dd72-7d7e-465b-aa1c-a5605ee59ea4}_OnDiskSnapshotProp
          • Size 6KB
          • SHA256 add3448abaf605493acd5804f7a1e45bd52066e621ffc5818052355bfea61b37
          • MD5 SHA1 SHA512 SSDEEP TLSH