Overview

overview

10

Static

static

1

_67aa3033a...770.js

windows10-2004-x64

10

_67aa3033a...770.js

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    143s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/07/2026, 18:03

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    _67aa3033ac68dadc36096277895080e9de3191d75541a884d761f4d38bd4a770.js
  • Size 4.5MB
  • Sample260702-wm7bfabv2v
  • SHA256 67aa3033ac68dadc36096277895080e9de3191d75541a884d761f4d38bd4a770
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwareduntokexecutiondonutloaderremcosloaderpersistenceransomwareratspywaresuricata

Malware Config

Extracted

Family

  • remcos

Version

  • 7.2.6 Pro

Botnet

  • Duntok

C2

  • yom.mefound.com:2444

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-OB4JKF

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Family: DonutLoader

    DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

    loaderdonutloader
  • Family: Remcos

    Remcos is a closed-source remote control and surveillance software.

    ratremcos
  • Suricata alert: REMCOS RAT Malware Inbound C2 Communication 3 IoCs

    Network activity triggered a Suricata alert

    suricataremcos
  • Suricata alert: REMCOS RAT Malware Outbound C2 Communication 5 IoCs

    Network activity triggered a Suricata alert

    suricataremcos
  • Detects DonutLoader 2 IoCs
    loader
  • 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.

    persistence
  • Executes dropped EXE 1 IoCs
  • Enumerates connected drives 3 TTPs 2 IoCs

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

  • Command and Scripting Interpreter: JavaScript 1 TTPs
    execution
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 42 IoCs
  • Suspicious use of SetWindowsHookEx 3 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.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\_67aa3033ac68dadc36096277895080e9de3191d75541a884d761f4d38bd4a770.js
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3256
    • C:\Users\Admin\Documents\FRJIRJQZPCOUVPGB.PIF
      "C:\Users\Admin\Documents\FRJIRJQZPCOUVPGB.PIF" C:\Users\Admin\Documents\FRJIRJQZPCOUVPGB.ttf
      2⤵
      • Suricata alert: REMCOS RAT Malware Inbound C2 Communication
      • Suricata alert: REMCOS RAT Malware Outbound C2 Communication
      • Executes dropped EXE
      PID:5128
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:1252
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:4472
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:616
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2352

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        prep_Activatable Class_Hermes_perf.cache
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 599B
        • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        FRJIRJQZPCOUVPGB.PIF
        • Path C:\Users\Admin\Documents\FRJIRJQZPCOUVPGB.PIF
        • Size 467KB
        • SHA256 52f0c0230b580e2fdf53a378b5c6d0db9829af900dae43e0df8f18635cd9f0c1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        FRJIRJQZPCOUVPGB.ttf
        • Path C:\Users\Admin\Documents\FRJIRJQZPCOUVPGB.ttf
        • Size 977KB
        • SHA256 f9e95b0161df5b2328aa32a3fb33dc31b656add357d0565dc9fcca9d62740c87
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/616-250-0x0000026A00230000-0x0000026A00664000-memory.dmp
        Download

        memory/2352-109-0x000001EE140D0000-0x000001EE140F0000-memory.dmp
        Download

        memory/2352-95-0x000001EE03B50000-0x000001EE03B70000-memory.dmp
        Download

        memory/2352-65-0x000001EE000A0000-0x000001EE001A0000-memory.dmp
        Download

        memory/2352-75-0x000001EE03800000-0x000001EE03820000-memory.dmp
        Download

        memory/2352-76-0x000001EE13D50000-0x000001EE13E50000-memory.dmp
        Download

        memory/5128-33-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-47-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-16-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-15-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-14-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-13-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-17-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-18-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-22-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-19-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-21-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-20-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-26-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-28-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-27-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-25-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-24-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-23-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-29-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-30-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-31-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-11-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-52-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-51-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-48-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-12-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-46-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-45-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-44-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-43-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-42-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-41-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-40-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-39-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-38-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-37-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-36-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-35-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-32-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-50-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-49-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-34-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-54-0x0000000016250000-0x00000000162F5000-memory.dmp
        Download

        memory/5128-53-0x0000000016250000-0x0000000017250000-memory.dmp
        Download

        memory/5128-10-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-9-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/5128-55-0x0000000002C50000-0x0000000002CFB000-memory.dmp
        Download

        memory/5128-59-0x0000000180000000-0x000000018012D000-memory.dmp
        Download

        memory/5128-56-0x0000000180000000-0x000000018012D000-memory.dmp
        Download

        memory/5128-60-0x0000000000400000-0x000000000047B000-memory.dmp
        Download

        memory/5128-61-0x0000000180000000-0x000000018012D000-memory.dmp
        Download