Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    25/01/2022, 11:46

General

  • Target
    IMG_8100034200035389923.exe
  • Size 779KB
  • Sample220125-nxbcrafccm
  • SHA256 5508d3fe5c41c4dec4a7570f0d60af3b6ba8cb9251ee1eae91e8fc061c3f58ef
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • remcos

Version
  • 3.3.2 Pro

Botnet
  • RemoteHost

C2
  • proprapra90.ddns.net:8810

  • storeyman7109.duckdns.org:8810

Attributes
  • audio_folder

    MicRecords

  • audio_path

    %AppData%

  • 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

  • install_path

    %AppData%

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    morethan-CJ2X2C

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

  • take_screenshot_title

    notepad;solitaire;

Signatures

  • Remcos

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\IMG_8100034200035389923.exe
    "C:\Users\Admin\AppData\Local\Temp\IMG_8100034200035389923.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Windows\SysWOW64\DpiScaling.exe
      C:\Windows\System32\DpiScaling.exe
      2⤵
        PID:1096

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          memory/1096-228-0x0000000000B80000-0x0000000000B81000-memory.dmp

          memory/1096-230-0x0000000000BB0000-0x0000000000BB1000-memory.dmp

          memory/1096-229-0x0000000000E40000-0x0000000000E41000-memory.dmp

          memory/1096-231-0x0000000074200000-0x000000007427E000-memory.dmp

          memory/1096-232-0x0000000000E50000-0x0000000000ECB000-memory.dmp

          memory/2468-118-0x0000000002220000-0x00000000023D0000-memory.dmp