Analysis

  • max time kernel
    148s
  • max time network
    194s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    11-08-2021 06:05

General

  • Target

    Re Confirmación de pedido-5305,pdf.exe

  • Size

    578KB

  • MD5

    38304d71a1633fc5a5b140994ab6ea77

  • SHA1

    9157f9998dd29f173612f527ec028eb75d17ca3a

  • SHA256

    c91012d41e9fa7f53370826fbeb4ddc7433026352a0d47d408f4b62ea0313d25

  • SHA512

    3300f6eee612c4ad24e8c2253220734911d7d88558f9ffe1d9664c7a055d18f214561ea1f8d29728425509c8f0eb7c262c1cc99c81c3e7b2d153df481ddaad43

Malware Config

Extracted

Family

remcos

Botnet

E sure 4 me

C2

thankyoulord4real.ddns.net:3030

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-7DDGKV

  • 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

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • 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 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Re Confirmación de pedido-5305,pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Re Confirmación de pedido-5305,pdf.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1100
    • C:\Program Files (x86)\internet explorer\ieinstal.exe
      "C:\Program Files (x86)\internet explorer\ieinstal.exe"
      2⤵
        PID:1332

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1100-59-0x0000000000230000-0x0000000000231000-memory.dmp
      Filesize

      4KB

    • memory/1100-60-0x0000000075B31000-0x0000000075B33000-memory.dmp
      Filesize

      8KB

    • memory/1332-61-0x0000000000000000-mapping.dmp
    • memory/1332-64-0x0000000000180000-0x0000000000181000-memory.dmp
      Filesize

      4KB

    • memory/1332-63-0x0000000000110000-0x0000000000111000-memory.dmp
      Filesize

      4KB

    • memory/1332-65-0x0000000010590000-0x000000001060D000-memory.dmp
      Filesize

      500KB

    • memory/1332-66-0x0000000000090000-0x0000000000091000-memory.dmp
      Filesize

      4KB

    • memory/1332-67-0x0000000000400000-0x000000000047A000-memory.dmp
      Filesize

      488KB