Analysis

  • max time kernel
    69s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    07/11/2022, 23:18

General

  • Target
    image2021042GFREDS12322ERDQ1DOC03027382DOC202205.exe
  • Size 999KB
  • Sample221107-299b7secb3
  • SHA256 da7ce792ea58fe4b0920be78435d44fef2ef1025cfac8abb0b43a9878d26c6c3
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • BACK-UP-DOMAIN

C2
  • www.arkern-tr.com:2404

Attributes
  • audio_folder

    MicRecords

  • 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

    Rec

  • mouse_option

    false

  • mutex

    Rmc-W3LVOT

  • 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

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.

  • ModiLoader Second Stage 29 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Program crash 1 IoCs
  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\image2021042GFREDS12322ERDQ1DOC03027382DOC202205.exe
    "C:\Users\Admin\AppData\Local\Temp\image2021042GFREDS12322ERDQ1DOC03027382DOC202205.exe"
    1⤵
    • Adds Run key to start application
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Windows\SysWOW64\wscript.exe
      C:\Windows\System32\wscript.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:240
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 240 -s 376
        3⤵
        • Program crash
        PID:1180

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/240-93-0x0000000001E40000-0x0000000001EBB000-memory.dmp

        memory/240-92-0x0000000010590000-0x000000001060E000-memory.dmp

        memory/240-66-0x0000000010590000-0x000000001060E000-memory.dmp

        memory/1608-75-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-77-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-57-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-64-0x0000000010590000-0x000000001060E000-memory.dmp

        memory/1608-65-0x0000000010590000-0x000000001060E000-memory.dmp

        memory/1608-58-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-68-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-69-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-70-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-71-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-72-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-73-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-74-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-54-0x0000000075A91000-0x0000000075A93000-memory.dmp

        memory/1608-76-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-61-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-78-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-79-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-80-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-83-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-84-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-82-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-81-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-87-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-88-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-86-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-85-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-60-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-90-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-89-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-59-0x0000000000290000-0x00000000002BB000-memory.dmp

        memory/1608-55-0x0000000000290000-0x00000000002BB000-memory.dmp