Analysis

  • user interaction
    yes
  • max time kernel
    402s
  • max time network
    535s
  • 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, 16:04

General

  • Target
    XClient.exe
  • Size 30KB
  • Sample260916-th1a8a1tfw
  • SHA256 2a56fdd8703e111c685d912ca9c3c5de500c0d8efaf9b774b4cb840f91916f87
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • xworm

Version
  • 3.0

C2
  • 188.52.56.123:5000

Mutex
  • u2cUG7ZWVKzCHixq

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 17 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Contacts third-party web service commonly abused for C2 1 TTPs 4 IoCs

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

  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Looks up external IP address via web service 1 TTPs 7 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 6 IoCs

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

  • Drops file in System32 directory 4 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 5 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 Internet Explorer settings 1 TTPs 1 IoCs
  • Modifies registry class 14 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 19 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:4756
    • C:\Users\Admin\AppData\Local\Temp\syvien.exe
      "C:\Users\Admin\AppData\Local\Temp\syvien.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:2528
    • C:\Users\Admin\AppData\Local\Temp\jwysng.exe
      "C:\Users\Admin\AppData\Local\Temp\jwysng.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:1472
    • C:\Users\Admin\AppData\Local\Temp\yygefu.exe
      "C:\Users\Admin\AppData\Local\Temp\yygefu.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:3028
    • C:\Users\Admin\AppData\Local\Temp\twzsou.exe
      "C:\Users\Admin\AppData\Local\Temp\twzsou.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:3932
    • C:\Users\Admin\AppData\Local\Temp\isibmk.exe
      "C:\Users\Admin\AppData\Local\Temp\isibmk.exe"
      2⤵
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      PID:3700
    • C:\Users\Admin\AppData\Local\Temp\djjjck.exe
      "C:\Users\Admin\AppData\Local\Temp\djjjck.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:5556
      • 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:5708
        • C:\Windows\System32\MatrixMBR.exe
          "C:\Windows\System32\MatrixMBR.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:3600
          • 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:1116
          • 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:3892
      • 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:4384
      • 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:5684
    • C:\Users\Admin\AppData\Local\Temp\ajhuit.exe
      "C:\Users\Admin\AppData\Local\Temp\ajhuit.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2980
      • 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:940
        • C:\Windows\System32\MatrixMBR.exe
          "C:\Windows\System32\MatrixMBR.exe"
          4⤵
          • Executes dropped EXE
          PID:3488
          • C:\Users\Admin\AppData\Local\Temp\GDI.exe
            "C:\Users\Admin\AppData\Local\Temp\GDI.exe"
            5⤵
              PID:1072
            • C:\Users\Admin\AppData\Local\Temp\MBR.exe
              "C:\Users\Admin\AppData\Local\Temp\MBR.exe"
              5⤵
                PID:5620
          • 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:4616
          • C:\Users\Admin\AppData\Local\Temp\TROLL2.exe
            "C:\Users\Admin\AppData\Local\Temp\TROLL2.exe"
            3⤵
            • Executes dropped EXE
            PID:4324
        • C:\Users\Admin\AppData\Local\Temp\uoodny.exe
          "C:\Users\Admin\AppData\Local\Temp\uoodny.exe"
          2⤵
            PID:4820
            • C:\Users\Admin\AppData\Local\Temp\MBR2.exe
              "C:\Users\Admin\AppData\Local\Temp\MBR2.exe"
              3⤵
                PID:2032
                • C:\Windows\System32\MatrixMBR.exe
                  "C:\Windows\System32\MatrixMBR.exe"
                  4⤵
                    PID:3304
                    • C:\Users\Admin\AppData\Local\Temp\GDI.exe
                      "C:\Users\Admin\AppData\Local\Temp\GDI.exe"
                      5⤵
                        PID:3692
                      • C:\Users\Admin\AppData\Local\Temp\MBR.exe
                        "C:\Users\Admin\AppData\Local\Temp\MBR.exe"
                        5⤵
                          PID:3576
                    • C:\Users\Admin\AppData\Local\Temp\TROLL5.exe
                      "C:\Users\Admin\AppData\Local\Temp\TROLL5.exe"
                      3⤵
                        PID:5072
                      • C:\Users\Admin\AppData\Local\Temp\TROLL2.exe
                        "C:\Users\Admin\AppData\Local\Temp\TROLL2.exe"
                        3⤵
                          PID:5308
                      • C:\Windows\system32\cmd.exe
                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDC6F.tmp.bat""
                        2⤵
                        • Executes a command shell one-liner
                        PID:808
                        • C:\Windows\system32\timeout.exe
                          timeout 3
                          3⤵
                          • Delays execution with timeout.exe
                          PID:4688
                    • C:\Windows\system32\userinit.exe
                      C:\Windows\system32\userinit.exe
                      1⤵
                      • Suspicious use of WriteProcessMemory
                      PID:1044
                      • C:\Windows\Explorer.EXE
                        C:\Windows\Explorer.EXE
                        2⤵
                        • Boot or Logon Autostart Execution: Active Setup
                        • Enumerates connected drives
                        • Modifies Internet Explorer settings
                        • Modifies registry class
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of FindShellTrayWindow
                        • Suspicious use of SendNotifyMessage
                        PID:476
                    • C:\Windows\system32\userinit.exe
                      C:\Windows\system32\userinit.exe
                      1⤵
                      • Suspicious use of WriteProcessMemory
                      PID:6084
                      • C:\Windows\Explorer.EXE
                        C:\Windows\Explorer.EXE
                        2⤵
                          PID:1904
                      • C:\Windows\system32\AUDIODG.EXE
                        C:\Windows\system32\AUDIODG.EXE 0x00000000000004E0 0x00000000000004EC
                        1⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:1068
                      • C:\Windows\system32\sihost.exe
                        sihost.exe
                        1⤵
                          PID:2712
                          • C:\Windows\explorer.exe
                            explorer.exe /LOADSAVEDWINDOWS
                            2⤵
                              PID:3532
                          • C:\Windows\system32\sihost.exe
                            sihost.exe
                            1⤵
                              PID:2900
                              • C:\Windows\explorer.exe
                                explorer.exe /LOADSAVEDWINDOWS
                                2⤵
                                  PID:2356
                              • C:\Windows\system32\svchost.exe
                                C:\Windows\system32\svchost.exe -k GPSvcGroup
                                1⤵
                                  PID:4592
                                • C:\Windows\System32\SecurityHealthHost.exe
                                  \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
                                  1⤵
                                    PID:3008

                                  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

                                        djjjck.exe

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

                                        isibmk.exe

                                        • Path C:\Users\Admin\AppData\Local\Temp\isibmk.exe
                                        • Size 802KB
                                        • SHA256 68a2b9da01ab0d8999c490f680d3e3fa7f12c0ec80a5c1ecae51af6047663cf4
                                        • MD5 SHA1 SHA512 SSDEEP TLSH

                                        syvien.exe

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

                                        tmpDC6F.tmp.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\tmpDC6F.tmp.bat
                                        • Size 159B
                                        • SHA256 954dee246fa11efccdf233aea5a3c223b5383d20a5c27cb8f361aeb32e00ad9a
                                        • MD5 SHA1 SHA512 TLSH

                                        MatrixMBR.exe

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

                                        memory/1116-132-0x0000000000150000-0x0000000000158000-memory.dmp

                                        memory/2528-55-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-14-0x0000000000190000-0x00000000005FA000-memory.dmp

                                        memory/2528-20-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-21-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-22-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-23-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-40-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-41-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-42-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-43-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-45-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-46-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-53-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-15-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-19-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-61-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-16-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-18-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/2528-17-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/3600-117-0x00000000000A0000-0x00000000000E6000-memory.dmp

                                        memory/3700-65-0x000001B76C3C0000-0x000001B76C48E000-memory.dmp

                                        memory/4324-163-0x0000000000400000-0x000000000041D000-memory.dmp

                                        memory/4384-106-0x0000000005340000-0x00000000053D2000-memory.dmp

                                        memory/4384-107-0x0000000005300000-0x000000000530A000-memory.dmp

                                        memory/4384-101-0x0000000000870000-0x0000000000928000-memory.dmp

                                        memory/4384-105-0x0000000005A10000-0x0000000005FCA000-memory.dmp

                                        memory/4756-5-0x00000000010E0000-0x00000000010EA000-memory.dmp

                                        memory/4756-4-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/4756-3-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/4756-2-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/4756-1-0x00000000009E0000-0x00000000009EE000-memory.dmp

                                        memory/4756-0-0x00007FFF2DDCF000-0x00007FFF2DDD0000-memory.dmp

                                        memory/4756-188-0x00007FFF2DC40000-0x00007FFF2E5E4000-memory.dmp

                                        memory/5308-183-0x0000000000400000-0x000000000041D000-memory.dmp

                                        memory/5556-75-0x000000001AF30000-0x000000001B014000-memory.dmp

                                        memory/5556-74-0x0000000000200000-0x00000000002EC000-memory.dmp

                                        memory/5684-118-0x0000000000400000-0x000000000041D000-memory.dmp

                                        memory/5708-85-0x0000000000820000-0x000000000085A000-memory.dmp