Analysis

  • max time kernel
    298s
  • max time network
    305s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-05-2024 20:05

General

  • Target

    XClient.exe

  • Size

    72KB

  • MD5

    dab9e10b713779e5a811a1c89ae6252a

  • SHA1

    fea8c8140c6b13fabdb258acb3a646c1a54e36be

  • SHA256

    e712b1e3a9313d86fce1ca310401f88e8fcda3c2b65ff9633613018bac09012f

  • SHA512

    ad6f6b0a0b1ce606964e1fa1ddd3ccef30fa2f90b1af3e57108b7a30aeb43aa02e64b407b519e1463597f4147f639eb1d09d4c0717127da8700d2998929b03fe

  • SSDEEP

    1536:XdqJfIiYkjEj1xFhI6mX1EgjbDhcb6rOFw2Uy:SlYJBjXkNjbDXOFwHy

Malware Config

Extracted

Family

xworm

C2

isbn-employee.gl.at.ply.gg:4328

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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).

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

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:2356
    • 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:1852
    • 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:2224
    • 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\Roaming\XClient.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1744
    • 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:5108

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

    Filesize

    944B

    MD5

    d28a889fd956d5cb3accfbaf1143eb6f

    SHA1

    157ba54b365341f8ff06707d996b3635da8446f7

    SHA256

    21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

    SHA512

    0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

    Filesize

    944B

    MD5

    4c513fe7261cbb0fd7ec5d03873693d6

    SHA1

    360d69bf9f5ba328d5f039f4802b2546ac346c4b

    SHA256

    4dc40c8efd2b217c5552937c9fd2b7ac00bc30ac50a81526ab6655278c5a4dc9

    SHA512

    8c0fbffdfc5003e06c7ae0b53052b3478fbd7e2e1b9028db12248383535d04dcfeb80069295e48c5e0ec60504f45610b7bd944b8852cada005a590660caa04d5

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

    Filesize

    944B

    MD5

    96e3b86880fedd5afc001d108732a3e5

    SHA1

    8fc17b39d744a9590a6d5897012da5e6757439a3

    SHA256

    c3077e4cadb4ed246c02abe55aa6cf832fee4c2546b7addb7d22cd1c7c8c1294

    SHA512

    909b1968f7204fa7029109b02232d8cc5438f6b4dc7c9044e4e47c59fcee538199b13029e36592b12ed573d48a308dd4822d2ced4129ab08d4111897e02be55d

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1sdyxu0z.54c.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/1852-8-0x000001B62B0B0000-0x000001B62B0D2000-memory.dmp

    Filesize

    136KB

  • memory/1852-14-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

    Filesize

    10.8MB

  • memory/1852-15-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

    Filesize

    10.8MB

  • memory/1852-18-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

    Filesize

    10.8MB

  • memory/1852-13-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

    Filesize

    10.8MB

  • memory/2356-0-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

    Filesize

    8KB

  • memory/2356-2-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

    Filesize

    10.8MB

  • memory/2356-1-0x0000000000EE0000-0x0000000000EF8000-memory.dmp

    Filesize

    96KB

  • memory/2356-57-0x00007FFFBA453000-0x00007FFFBA455000-memory.dmp

    Filesize

    8KB

  • memory/2356-58-0x00007FFFBA450000-0x00007FFFBAF11000-memory.dmp

    Filesize

    10.8MB