Overview

overview

10

Static

static

10

XClient.exe

windows7-x64

XClient.exe

windows10-2004-x64

Analysis

  • max time kernel
    129s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 08:16

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Errors

Reason
Machine shutdown

General

  • Target
    XClient.exe
  • Size 83KB
  • Sample240603-j6bmnagh4y
  • SHA256 c120bbb1b7918b280938b89b9966d2c64d85d46bb303b4c7ba6051acd9a2af8b
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
xwormexecutionpersistencerattrojan

Malware Config

Extracted

Family

  • xworm

C2

  • 127.0.0.1:8848

  • mb-each.gl.at.ply.gg:8848

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Looks up external IP address via web service 1 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

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

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Modifies data under HKEY_USERS 15 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1276
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4632
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4548
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2864
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4844
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Local\XClient.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2532
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1296
  • C:\Users\Admin\AppData\Local\XClient.exe
    C:\Users\Admin\AppData\Local\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3704
  • C:\Users\Admin\AppData\Local\XClient.exe
    C:\Users\Admin\AppData\Local\XClient.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4908
  • C:\Windows\system32\LogonUI.exe
    "LogonUI.exe" /flags:0x4 /state0:0xa396f055 /state1:0x41c64e6d
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:2120

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        XClient.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.log
        • Size 654B
        • SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
        • MD5 SHA1 SHA512
        Submit Download

        powershell.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
        • MD5 SHA1 SHA512
        Submit Download

        StartupProfileData-NonInteractive
        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c
        • MD5 SHA1 SHA512
        Submit Download

        StartupProfileData-NonInteractive
        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 e2fb83098e114084f51ed7187334f861ce670051046c39f338928296ca9a49cf
        • MD5 SHA1 SHA512
        Submit Download

        StartupProfileData-NonInteractive
        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 944B
        • SHA256 314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3
        • MD5 SHA1 SHA512
        Submit Download

        __PSScriptPolicyTest_tvxhicfe.eih.ps1
        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tvxhicfe.eih.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512
        Submit Download

        XClient.exe
        • Path C:\Users\Admin\AppData\Local\XClient.exe
        • Size 83KB
        • SHA256 c120bbb1b7918b280938b89b9966d2c64d85d46bb303b4c7ba6051acd9a2af8b
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        XClient.lnk
        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk
        • Size 962B
        • SHA256 af2d690930c54f9a36e985549a7625a6272ceafcedf7e85c963068175cfe2f87
        • MD5 SHA1 SHA512
        Submit Download

        memory/1276-68-0x000000001C570000-0x000000001C672000-memory.dmp
        Download

        memory/1276-70-0x00007FFD82D83000-0x00007FFD82D85000-memory.dmp
        Download

        memory/1276-0-0x00007FFD82D83000-0x00007FFD82D85000-memory.dmp
        Download

        memory/1276-5-0x00007FFD82D80000-0x00007FFD83841000-memory.dmp
        Download

        memory/1276-71-0x00007FFD82D80000-0x00007FFD83841000-memory.dmp
        Download

        memory/1276-89-0x00007FFD82D80000-0x00007FFD83841000-memory.dmp
        Download

        memory/1276-1-0x0000000000A10000-0x0000000000A2C000-memory.dmp
        Download

        memory/1296-15-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-9-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-10-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-11-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-12-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-13-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-14-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-2-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-3-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/1296-4-0x0000027284C00000-0x0000027284C01000-memory.dmp
        Download

        memory/4632-16-0x00000231F0170000-0x00000231F0192000-memory.dmp
        Download