Analysis

  • max time kernel
    150s
  • max time network
    133s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    16/09/2026, 16:46

General

  • Target
    XClient.exe
  • Size 30KB
  • Sample260916-vae6ratamf
  • SHA256 427a4cc7d184449eb70a2c75462b3a142ab718b9d4d22d3f94b8c5923c164b35
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 3.0

C2
  • 188.52.56.123:5000

Mutex
  • A9qFI6duEDgQB152

Attributes
  • install_file

    USB.exe

aes.plain

Signatures

  • Family: Xworm

    Xworm is a remote access trojan written in C#.

  • Detect Xworm Payload 1 IoCs
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

  • Disables Task Manager via registry modification
  • Executes dropped EXE 8 IoCs
  • Adds Run key to start application 2 TTPs 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.

  • Looks up external IP address via web service 1 TTPs 4 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 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
  • Modifies registry class 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4696
    • C:\Users\Admin\AppData\Local\Temp\auioxr.exe
      "C:\Users\Admin\AppData\Local\Temp\auioxr.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:5360
      • C:\Users\Admin\AppData\Local\Temp\MBR2.exe
        "C:\Users\Admin\AppData\Local\Temp\MBR2.exe"
        3⤵
        • Executes dropped EXE
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:3440
        • C:\Windows\System32\MatrixMBR.exe
          "C:\Windows\System32\MatrixMBR.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:5036
          • C:\Users\Admin\AppData\Local\Temp\GDI.exe
            "C:\Users\Admin\AppData\Local\Temp\GDI.exe"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:904
          • C:\Users\Admin\AppData\Local\Temp\MBR.exe
            "C:\Users\Admin\AppData\Local\Temp\MBR.exe"
            5⤵
            • Executes dropped EXE
            • Writes to the Master Boot Record (MBR)
            • System Location Discovery: System Language Discovery
            PID:2292
      • C:\Users\Admin\AppData\Local\Temp\TROLL5.exe
        "C:\Users\Admin\AppData\Local\Temp\TROLL5.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4768
      • C:\Users\Admin\AppData\Local\Temp\TROLL2.exe
        "C:\Users\Admin\AppData\Local\Temp\TROLL2.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:5132
    • C:\Users\Admin\AppData\Local\Temp\ulhjjn.exe
      "C:\Users\Admin\AppData\Local\Temp\ulhjjn.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Writes to the Master Boot Record (MBR)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4976
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7B4C.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:2424
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4568
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x00000000000004E0 0x00000000000004D0
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3652
  • C:\Windows\system32\userinit.exe
    C:\Windows\system32\userinit.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1680
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:4588
  • C:\Windows\system32\userinit.exe
    C:\Windows\system32\userinit.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5052
    • C:\Windows\Explorer.EXE
      C:\Windows\Explorer.EXE
      2⤵
        PID:4288

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          GDI.exe

          • Path C:\Users\Admin\AppData\Local\Temp\GDI.exe
          • Size 11KB
          • SHA256 e153def894c867923dd56a7025b7b0b7bd3ee37c801a5957201d39f999bb28bf
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MBR.exe

          • Path C:\Users\Admin\AppData\Local\Temp\MBR.exe
          • Size 93KB
          • SHA256 acddde9514e3b9d5c40b3d1750af5f4187c99f8987b027d6da44fb6bcf79b3ca
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MBR2.exe

          • Path C:\Users\Admin\AppData\Local\Temp\MBR2.exe
          • Size 205KB
          • SHA256 c22e2419f04fe03a92255a139ca8814697962e86d191a1d4171788fd0c903f68
          • MD5 SHA1 SHA512 SSDEEP TLSH

          TROLL2.exe

          • Path C:\Users\Admin\AppData\Local\Temp\TROLL2.exe
          • Size 105KB
          • SHA256 dcdf5140bc51db27f3aec80ae9a66a57aad446a2522904d288770e8d8cde8cee
          • MD5 SHA1 SHA512 SSDEEP TLSH

          TROLL5.exe

          • Path C:\Users\Admin\AppData\Local\Temp\TROLL5.exe
          • Size 712KB
          • SHA256 79f00c7dab0891824136539fabd542c74e26cbed94b9add3f1aa7f793d653de6
          • MD5 SHA1 SHA512 SSDEEP TLSH

          auioxr.exe

          • Path C:\Users\Admin\AppData\Local\Temp\auioxr.exe
          • Size 921KB
          • SHA256 deaf30953149d0bef45a11bd89f4ef69f77115e50380c7ef3607c37ff4f40a1d
          • MD5 SHA1 SHA512 SSDEEP TLSH

          tmp7B4C.tmp.bat

          • Path C:\Users\Admin\AppData\Local\Temp\tmp7B4C.tmp.bat
          • Size 159B
          • SHA256 070c75f29228ed5b3e40066396037162db249451776691666ae0502cef8c8463
          • MD5 SHA1 SHA512 TLSH

          ulhjjn.exe

          • Path C:\Users\Admin\AppData\Local\Temp\ulhjjn.exe
          • Size 4.4MB
          • SHA256 fc1d570bcc04951b6b4dc2767d73469f67ef701eadcecdd2522915aef50c7169
          • MD5 SHA1 SHA512 SSDEEP TLSH

          MatrixMBR.exe

          • Path C:\Windows\System32\MatrixMBR.exe
          • Size 250KB
          • SHA256 339fe94164952a8454e6ec5fc75e2c38baade2c14b231e47bf41989ffbb55ee4
          • MD5 SHA1 SHA512 SSDEEP TLSH

          memory/904-88-0x0000000000830000-0x0000000000838000-memory.dmp

          memory/3440-31-0x00000000008C0000-0x00000000008FA000-memory.dmp

          memory/4696-5-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/4696-6-0x0000000001530000-0x000000000153A000-memory.dmp

          memory/4696-97-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/4696-1-0x0000000000C60000-0x0000000000C6E000-memory.dmp

          memory/4696-2-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/4696-0-0x00007FFC0AD5F000-0x00007FFC0AD60000-memory.dmp

          memory/4696-3-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/4696-4-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/4768-54-0x0000000005130000-0x000000000513A000-memory.dmp

          memory/4768-53-0x0000000005150000-0x00000000051E2000-memory.dmp

          memory/4768-51-0x00000000057D0000-0x0000000005D8A000-memory.dmp

          memory/4768-50-0x0000000000690000-0x0000000000748000-memory.dmp

          memory/4976-63-0x0000000000320000-0x000000000078A000-memory.dmp

          memory/5036-73-0x0000000000800000-0x0000000000846000-memory.dmp

          memory/5132-74-0x0000000000400000-0x000000000041D000-memory.dmp

          memory/5360-15-0x0000000000B80000-0x0000000000C6C000-memory.dmp

          memory/5360-18-0x000000001BAC0000-0x000000001BBA4000-memory.dmp

          memory/5360-52-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/5360-19-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/5360-16-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/5360-17-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/5360-23-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp

          memory/5360-20-0x00007FFC0ABD0000-0x00007FFC0B574000-memory.dmp