Resubmissions

10/09/2026, 19:43

260910-yfc55avfnf7

10/09/2026, 19:38

260910-ycqxtaveng10

Analysis

  • user interaction
    yes
  • max time kernel
    132s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    10/09/2026, 19:43

General

  • Target
    RustLuma.msi
  • Size 245.3MB
  • Sample260910-yfc55avfnf
  • SHA256 e768d15f6f364c7a2bfa7daa2348b5438cfa7c932fea4f6d0f5f5da3031337ce
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Executes dropped EXE 2 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 Windows directory 8 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Checks SCSI registry key(s) 3 TTPs 8 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 59 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 9 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\RustLuma.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:3612
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2676
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:2492
      • C:\Windows\system32\cmd.exe
        cmd.exe /c start /b svchost.exe
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:5692
        • C:\Users\Admin\AppData\Local\SystemService_6135\svchost.exe
          svchost.exe
          3⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:3348
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            powershell -Command " $member = '[DllImport(\"user32.dll\")] public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);'; $type = Add-Type -MemberDefinition $member -Name \"Win32ShowWindow\" -Namespace Win32 -PassThru; $hwnd = (Get-Process -Id 3348).MainWindowHandle; if ($hwnd -ne [IntPtr]::Zero) { $type::ShowWindow($hwnd, 0); } "
            4⤵
            • Command and Scripting Interpreter: PowerShell
            PID:468
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /d /s /c "reg add "HKCU\Environment" /v "UserInitMprLogonScript" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\PowerShell\powershell_core.exe" /f"
            4⤵
            • Executes a command shell one-liner
            PID:4688
          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\PowerShell\powershell_core.exe
            C:\Users\Admin\AppData\Roaming\Microsoft\Windows\PowerShell\powershell_core.exe
            4⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:5268
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              powershell -Command " $member = '[DllImport(\"user32.dll\")] public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);'; $type = Add-Type -MemberDefinition $member -Name \"Win32ShowWindow\" -Namespace Win32 -PassThru; $hwnd = (Get-Process -Id 5268).MainWindowHandle; if ($hwnd -ne [IntPtr]::Zero) { $type::ShowWindow($hwnd, 0); } "
              5⤵
              • Command and Scripting Interpreter: PowerShell
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of WriteProcessMemory
              PID:772
              • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
                "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\xv2iq4lt\xv2iq4lt.cmdline"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:2376
                • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
                  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESC53F.tmp" "c:\Users\Admin\AppData\Local\Temp\xv2iq4lt\CSC9CE4B29653E46B0955541B23C61CCC.TMP"
                  7⤵
                    PID:1032
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Checks SCSI registry key(s)
        • Suspicious use of AdjustPrivilegeToken
        PID:5168
      • C:\Windows\system32\taskmgr.exe
        "C:\Windows\system32\taskmgr.exe" /4
        1⤵
        • Checks SCSI registry key(s)
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:4964
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k SDRSVC
        1⤵
          PID:1716
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:1984
          • C:\Windows\System32\s0ygao.exe
            "C:\Windows\System32\s0ygao.exe"
            1⤵
              PID:5148
            • C:\Windows\System32\s0ygao.exe
              "C:\Windows\System32\s0ygao.exe"
              1⤵
                PID:1236
              • C:\Windows\System32\s0ygao.exe
                "C:\Windows\System32\s0ygao.exe"
                1⤵
                  PID:5900

                Network

                      MITRE ATT&CK Enterprise v16

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      e587d3b.rbs

                      • Path C:\Config.Msi\e587d3b.rbs
                      • Size 8KB
                      • SHA256 d835a35f66e8b966b027165f8e463e811ef4a6f7e0847412f1852a5b1c657a1a
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      .system

                      • Path C:\Users\Admin\.system
                      • Size 14B
                      • SHA256 ca92d528b506d4f2bda0fc384f0bfa580fd0081c8706f482cb608146a6703773
                      • MD5 SHA1 SHA512

                      svchost.exe

                      • Path C:\Users\Admin\AppData\Local\SystemService_6135\svchost.exe
                      • Size 44.9MB
                      • SHA256 c823547f1d226b0d9b95444e89adacf2eeec728d9ecb8720785b6320b28b03e0
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      RESC53F.tmp

                      • Path C:\Users\Admin\AppData\Local\Temp\RESC53F.tmp
                      • Size 1KB
                      • SHA256 a4306bf743f38788426ba35ca5ec9ea27e61dfcf38a033df36500b2c351f0ed8
                      • MD5 SHA1 SHA512 TLSH

                      __PSScriptPolicyTest_oxnu405l.nyn.ps1

                      • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oxnu405l.nyn.ps1
                      • Size 60B
                      • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                      • MD5 SHA1 SHA512 TLSH

                      xv2iq4lt.dll

                      • Path C:\Users\Admin\AppData\Local\Temp\xv2iq4lt\xv2iq4lt.dll
                      • Size 3KB
                      • SHA256 6b20bdca26dc1c47800b37e7234b348f6efdb8ef0f28ac36a5d2d85ff6650071
                      • MD5 SHA1 SHA512 TLSH

                      metadata-2

                      • Path \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2
                      • Size 24.1MB
                      • SHA256 26e257adb322673817d12f8aeb11a6d615e854f51df7e32d5abbc4375739ac97
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      {fbe9d840-e421-42a4-87f9-a718c99542e3}_OnDiskSnapshotProp

                      • Path \??\Volume{12d9ef41-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{fbe9d840-e421-42a4-87f9-a718c99542e3}_OnDiskSnapshotProp
                      • Size 6KB
                      • SHA256 f108d6cd150bddb575b90b5afa91b030cff85ae03e39b9022c87f4d82a181f24
                      • MD5 SHA1 SHA512 SSDEEP TLSH

                      CSC9CE4B29653E46B0955541B23C61CCC.TMP

                      • Path \??\c:\Users\Admin\AppData\Local\Temp\xv2iq4lt\CSC9CE4B29653E46B0955541B23C61CCC.TMP
                      • Size 652B
                      • SHA256 7960d57dc3348470160924a0d4c031665872c771882f399820dee692eaa4ebc4
                      • MD5 SHA1 SHA512 TLSH

                      xv2iq4lt.0.cs

                      • Path \??\c:\Users\Admin\AppData\Local\Temp\xv2iq4lt\xv2iq4lt.0.cs
                      • Size 218B
                      • SHA256 531c21f32b41b8651df1f844f1a6485b19926699ff33c80de4fc70a44882394c
                      • MD5 SHA1 SHA512 TLSH

                      xv2iq4lt.cmdline

                      • Path \??\c:\Users\Admin\AppData\Local\Temp\xv2iq4lt\xv2iq4lt.cmdline
                      • Size 369B
                      • SHA256 185746e70dc831bd631e7a18f94f53aacba7912300afb7aa8131f04f3bd9826b
                      • MD5 SHA1 SHA512 TLSH

                      memory/772-55-0x0000026674880000-0x0000026674888000-memory.dmp

                      memory/772-35-0x0000026674850000-0x0000026674872000-memory.dmp

                      memory/4964-68-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-60-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-59-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-70-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-69-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-58-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-67-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-66-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-65-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-64-0x000001771B400000-0x000001771B401000-memory.dmp

                      memory/4964-77-0x000001771A000000-0x000001771A010000-memory.dmp

                      memory/4964-71-0x0000017719FA0000-0x0000017719FB0000-memory.dmp