Overview

overview

10

Static

static

1

_b6b534476...678.js

windows10-2004-x64

10

_b6b534476...678.js

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    121s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260706-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260706-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    07/07/2026, 10:28

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General

  • Target
    _b6b53447639ba3cabf6a16e27263c58ede0bef19706e2753bad2500d4f882678.js
  • Size 4.3MB
  • Sample260707-mhtecacz2k
  • SHA256 b6b53447639ba3cabf6a16e27263c58ede0bef19706e2753bad2500d4f882678
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwareremotehostexecutiondonutloaderremcosloaderpersistenceratspywaresuricata

Malware Config

Extracted

Family

  • remcos

Version

  • 7.2.6 Pro

Botnet

  • RemoteHost

C2

  • 185.149.24.6:2406

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-OMF5I9

  • 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 37 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 40 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 39 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\wscript.exe
    wscript.exe C:\Users\Admin\AppData\Local\Temp\_b6b53447639ba3cabf6a16e27263c58ede0bef19706e2753bad2500d4f882678.js
    1⤵
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:4220
    • C:\Users\Admin\Documents\ASQKBYIQQFQEZIEW.PIF
      "C:\Users\Admin\Documents\ASQKBYIQQFQEZIEW.PIF" C:\Users\Admin\Documents\ASQKBYIQQFQEZIEW.ttf
      2⤵
      • Suricata alert: REMCOS RAT Malware Inbound C2 Communication
      • Suricata alert: REMCOS RAT Malware Outbound C2 Communication
      • Executes dropped EXE
      PID:4712
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:1664
    • 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:6112
  • 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:5320
  • 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:2724

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 595B
        • SHA256 d4e60617c2afab8263febabe7f14f18595715078d71307a8cefe0707dae76dee
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        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

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

        ASQKBYIQQFQEZIEW.ttf
        • Path C:\Users\Admin\Documents\ASQKBYIQQFQEZIEW.ttf
        • Size 977KB
        • SHA256 086b02abeb68274c230ff358ef11ba4a18f92936c1f0c90b8848bfc80dfec136
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/4712-10-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-9-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-11-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-12-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-16-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-18-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-22-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-21-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-20-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-19-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-17-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-15-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-14-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-13-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-27-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-26-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-25-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-24-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-23-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-28-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-29-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-30-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-33-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-32-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-51-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-50-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-49-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-48-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-47-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-46-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-45-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-44-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-43-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-42-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-41-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-40-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-39-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-38-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-37-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-36-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-35-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-31-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-34-0x000000002A4F0000-0x000000002A500000-memory.dmp
        Download

        memory/4712-53-0x0000000016290000-0x0000000016335000-memory.dmp
        Download

        memory/4712-52-0x0000000016290000-0x0000000017290000-memory.dmp
        Download

        memory/4712-54-0x0000000002D30000-0x0000000002DDB000-memory.dmp
        Download

        memory/4712-58-0x0000000180000000-0x000000018012D000-memory.dmp
        Download

        memory/4712-57-0x0000000180000000-0x000000018012D000-memory.dmp
        Download

        memory/4712-59-0x0000000000400000-0x000000000047B000-memory.dmp
        Download

        memory/4712-60-0x0000000180000000-0x000000018012D000-memory.dmp
        Download

        memory/5320-63-0x000002C600100000-0x000002C600200000-memory.dmp
        Download

        memory/5320-94-0x000002C614560000-0x000002C614580000-memory.dmp
        Download

        memory/5320-76-0x000002C613D50000-0x000002C613E50000-memory.dmp
        Download

        memory/5320-82-0x000002C603B70000-0x000002C603B90000-memory.dmp
        Download

        memory/5320-74-0x000002C603920000-0x000002C603940000-memory.dmp
        Download

        memory/6112-245-0x000000000E760000-0x000000000EFDB000-memory.dmp
        Download