Analysis

  • max time kernel
    72s
  • max time network
    70s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31-05-2024 12:42

General

  • Target

    XClient.exe

  • Size

    60KB

  • MD5

    0f803689398c092ad9ae274d5c7507d6

  • SHA1

    693161863fa62cb65e7f3102d55087a9bf816889

  • SHA256

    0c336bb9258f45ded239bfd2a721a779c3a467cfd177d9ab75841d6eb61d2a8a

  • SHA512

    1fed05b278b8243c1e45c34a1eca78492fb24d18296feac978bd54528359d2c07a783bff434921a26a96ba122a8dc9da6d00b9cdda09c6c8569910d0472080f8

  • SSDEEP

    1536:b5GHtqKStfgDGVHc08kbsXHZBgGOq+k6Z:lGNqrIDK8kbsXLOq+bZ

Malware Config

Extracted

Family

xworm

C2

91.92.241.69:5555

Attributes
  • Install_directory

    %AppData%

  • install_file

    AMD Graphics Manager.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3904
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "AMD Graphics Manager" /tr "C:\Users\Admin\AppData\Roaming\AMD Graphics Manager"
      2⤵
      • Creates scheduled task(s)
      PID:1392
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:1600
  • C:\Users\Admin\AppData\Roaming\AMD Graphics Manager
    "C:\Users\Admin\AppData\Roaming\AMD Graphics Manager"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3052

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

    Filesize

    10KB

    MD5

    18951ad4190ed728ba23e932e0c6e0db

    SHA1

    fa2d16fcbc3defd07cb8f21d8ea4793a21f261f0

    SHA256

    66607b009c345a8e70fc1e58ab8a13bbea0e370c8d75f16d2cce5b876a748915

    SHA512

    a67237089efa8615747bdc6cfe0afc977dc54cfd624a8d2e5124a441c204f1ec58ee7cfbbc105ddc2c18d4f254b9e124d71630bcdba0253d41a96890104f2fff

  • C:\Users\Admin\AppData\Roaming\AMD Graphics Manager

    Filesize

    60KB

    MD5

    0f803689398c092ad9ae274d5c7507d6

    SHA1

    693161863fa62cb65e7f3102d55087a9bf816889

    SHA256

    0c336bb9258f45ded239bfd2a721a779c3a467cfd177d9ab75841d6eb61d2a8a

    SHA512

    1fed05b278b8243c1e45c34a1eca78492fb24d18296feac978bd54528359d2c07a783bff434921a26a96ba122a8dc9da6d00b9cdda09c6c8569910d0472080f8

  • memory/3904-0-0x0000000000300000-0x0000000000316000-memory.dmp

    Filesize

    88KB

  • memory/3904-1-0x00007FF94CB73000-0x00007FF94CB75000-memory.dmp

    Filesize

    8KB

  • memory/3904-5-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

    Filesize

    10.8MB

  • memory/3904-6-0x000000001C430000-0x000000001C780000-memory.dmp

    Filesize

    3.3MB

  • memory/3904-7-0x00007FF94CB73000-0x00007FF94CB75000-memory.dmp

    Filesize

    8KB

  • memory/3904-8-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

    Filesize

    10.8MB