Overview

overview

10

Static

static

10

3.exe

windows10-2004-x64

10

3.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    05/11/2026, 04:33

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General

  • Target
    3.exe
  • Size 644KB
  • Sample261105-e6k4wafx3t
  • SHA256 771b7a82cc28db768c6c941a58877dda5d2aa290ce3a60a9308ab142ccc4642a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
au88discoveryremcospersistencerat

Malware Config

Extracted

Family

  • remcos

Version

  • 7.3.1 Pro

Botnet

  • au88

C2

  • au88au88.online:80

  • www.au88au88.online:80

  • c2.au88au88.online:8443

  • api.au88au88.online:2404

  • au88au88.online:8443

  • au88au88.online:443

Attributes
  • audio_folder

    au88

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    App.exe

  • copy_folder

    au88

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-PUC7JN

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Family: Remcos

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

    ratremcos
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

    discovery
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3.exe
    "C:\Users\Admin\AppData\Local\Temp\3.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:5972
    • C:\ProgramData\au88\App.exe
      "C:\ProgramData\au88\App.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Reads the TCP/IP host and domain name from the registry
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:6072
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x00000000000004C0 0x00000000000004B8
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4292

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        App.exe
        • Path C:\ProgramData\au88\App.exe
        • Size 644KB
        • SHA256 771b7a82cc28db768c6c941a58877dda5d2aa290ce3a60a9308ab142ccc4642a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        logs.dat
        • Path C:\ProgramData\remcos\logs.dat
        • Size 208B
        • SHA256 94a121cb0495da49a0c0af35c32e60d8a7140db543173044c223aeb5143608f9
        • MD5 SHA1 SHA512 TLSH
        Submit Download