Analysis

  • max time kernel
    139s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    12/04/2022, 15:03

General

  • Target
    Documento de entrega de envío DHL227024.exe
  • Size 639KB
  • Sample220412-se1bdafhh7
  • SHA256 6a41331a44711da6d020c1909dafabdca5a68357d56f1a3b702ec39fd69afda7
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • boysgoblow.hopto.org:7838

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

    Remcos-K11KTM

  • 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.

  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Documento de entrega de envío DHL227024.exe
    "C:\Users\Admin\AppData\Local\Temp\Documento de entrega de envío DHL227024.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1928
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
        PID:2348
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2348 -s 496
          3⤵
          • Program crash
          PID:456
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2348 -ip 2348
      1⤵
        PID:4812

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            memory/1928-130-0x0000000000DF0000-0x0000000000E96000-memory.dmp

            memory/1928-131-0x0000000005E30000-0x00000000063D4000-memory.dmp

            memory/1928-132-0x0000000005880000-0x0000000005912000-memory.dmp

            memory/2348-135-0x0000000001100000-0x0000000001179000-memory.dmp

            memory/2348-140-0x0000000001100000-0x0000000001179000-memory.dmp

            memory/2348-145-0x0000000001100000-0x0000000001179000-memory.dmp