Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-en
  • submitted
    09-09-2021 14:01

General

  • Target

    heimatec RFQ 4556_ DRINGEND,pdf.exe

  • Size

    832KB

  • MD5

    0fc8ba2820bc82c3f1dbebdbc31b13a9

  • SHA1

    810bdb6a806ee7ed18b49b5a0eab41114a943009

  • SHA256

    0d903cb51d86a47ea9baa01286e9a7d0c325f6412bc0e5cd48a4ba95c84e6d49

  • SHA512

    0b8591fca00cadef03b8329fab6bb5082d502f58d229b4780cc1c3f23c2af596e29ac4a3f432e17915d37eb61416f6ec7e3ddc1ec0ffd3a76e3c1f0a6fa7b17a

Malware Config

Extracted

Family

remcos

Version

3.2.1 Pro

Botnet

CELEBRATION

C2

ongod4ever.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-FCUJUB

  • 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
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\heimatec RFQ 4556_ DRINGEND,pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\heimatec RFQ 4556_ DRINGEND,pdf.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1664
    • C:\Program Files (x86)\internet explorer\ieinstal.exe
      "C:\Program Files (x86)\internet explorer\ieinstal.exe"
      2⤵
        PID:856
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Public\Trast.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:460
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:692
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            4⤵
            • Modifies registry key
            PID:2028
          • C:\Windows\SysWOW64\reg.exe
            reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\KDECO.bat reg delete hkcu\Environment /v windir /f && REM "
            4⤵
            • Modifies registry key
            PID:1820
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
            4⤵
              PID:1324
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Public\nest.bat" "
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1576
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            3⤵
            • Modifies registry key
            PID:1420

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Public\Trast.bat

        MD5

        4068c9f69fcd8a171c67f81d4a952a54

        SHA1

        4d2536a8c28cdcc17465e20d6693fb9e8e713b36

        SHA256

        24222300c78180b50ed1f8361ba63cb27316ec994c1c9079708a51b4a1a9d810

        SHA512

        a64f9319acc51fffd0491c74dcd9c9084c2783b82f95727e4bfe387a8528c6dcf68f11418e88f1e133d115daf907549c86dd7ad866b2a7938add5225fbb2811d

      • C:\Users\Public\UKO.bat

        MD5

        eaf8d967454c3bbddbf2e05a421411f8

        SHA1

        6170880409b24de75c2dc3d56a506fbff7f6622c

        SHA256

        f35f2658455a2e40f151549a7d6465a836c33fa9109e67623916f889849eac56

        SHA512

        fe5be5c673e99f70c93019d01abb0a29dd2ecf25b2d895190ff551f020c28e7d8f99f65007f440f0f76c5bcac343b2a179a94d190c938ea3b9e1197890a412e9

      • C:\Users\Public\nest.bat

        MD5

        8ada51400b7915de2124baaf75e3414c

        SHA1

        1a7b9db12184ab7fd7fce1c383f9670a00adb081

        SHA256

        45aa3957c29865260a78f03eef18ae9aebdbf7bea751ecc88be4a799f2bb46c7

        SHA512

        9afc138157a4565294ca49942579cdb6f5d8084e56f9354738de62b585f4c0fa3e7f2cbc9541827f2084e3ff36c46eed29b46f5dd2444062ffcd05c599992e68

      • memory/460-56-0x0000000000000000-mapping.dmp

      • memory/692-58-0x0000000000000000-mapping.dmp

      • memory/856-65-0x0000000000180000-0x0000000000181000-memory.dmp

        Filesize

        4KB

      • memory/856-54-0x0000000000000000-mapping.dmp

      • memory/856-63-0x00000000000D0000-0x00000000000D1000-memory.dmp

        Filesize

        4KB

      • memory/856-64-0x0000000000110000-0x0000000000111000-memory.dmp

        Filesize

        4KB

      • memory/856-66-0x0000000010590000-0x000000001060C000-memory.dmp

        Filesize

        496KB

      • memory/856-67-0x0000000000400000-0x0000000000479000-memory.dmp

        Filesize

        484KB

      • memory/1324-62-0x0000000000000000-mapping.dmp

      • memory/1420-70-0x0000000000000000-mapping.dmp

      • memory/1576-68-0x0000000000000000-mapping.dmp

      • memory/1664-52-0x0000000000230000-0x0000000000231000-memory.dmp

        Filesize

        4KB

      • memory/1664-53-0x0000000075231000-0x0000000075233000-memory.dmp

        Filesize

        8KB

      • memory/1820-61-0x0000000000000000-mapping.dmp

      • memory/2028-60-0x0000000000000000-mapping.dmp