Analysis

  • max time kernel
    148s
  • max time network
    159s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14-09-2021 09:21

General

  • Target

    SPT DRINGENDE BESTELLUNG _876453,pdf.exe

  • Size

    713KB

  • MD5

    6085b6626841002f150b9db8778abd79

  • SHA1

    dd0d3b976528fd3c9dbc314c91f1da20f552b8f1

  • SHA256

    345a3a6d237b412a796b28b93018e1b55a998caaa6d3f5ff0cd57e390f9ac247

  • SHA512

    0e60753341137cf2d224517d927b8ff2c58b8a5dd898664ff32cae18e626a8bec8db6a65d3a8efe08a6a463d5bb45ba8ba17a7d20c642aeaeeaf9cfc78eaf164

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

  • Remcos

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

  • suricata: ET MALWARE Remocs 3.x Unencrypted Checkin

    suricata: ET MALWARE Remocs 3.x Unencrypted Checkin

  • suricata: ET MALWARE Remocs 3.x Unencrypted Server Response

    suricata: ET MALWARE Remocs 3.x Unencrypted Server Response

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SPT DRINGENDE BESTELLUNG _876453,pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\SPT DRINGENDE BESTELLUNG _876453,pdf.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:3128
    • C:\Windows\SysWOW64\secinit.exe
      C:\Windows\System32\secinit.exe
      2⤵
        PID:3548
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Trast.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3996
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3480
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            4⤵
            • Modifies registry key
            PID:3156
          • 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:740
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
            4⤵
              PID:2244
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Public\nest.bat" "
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:988
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            3⤵
            • Modifies registry key
            PID:1084

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Defense Evasion

      Modify Registry

      2
      T1112

      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/740-121-0x0000000000000000-mapping.dmp
      • memory/988-128-0x0000000000000000-mapping.dmp
      • memory/1084-130-0x0000000000000000-mapping.dmp
      • memory/2244-122-0x0000000000000000-mapping.dmp
      • memory/3128-114-0x00000000004C0000-0x000000000060A000-memory.dmp
        Filesize

        1.3MB

      • memory/3156-120-0x0000000000000000-mapping.dmp
      • memory/3480-118-0x0000000000000000-mapping.dmp
      • memory/3548-123-0x0000000000560000-0x0000000000561000-memory.dmp
        Filesize

        4KB

      • memory/3548-125-0x0000000010590000-0x000000001060C000-memory.dmp
        Filesize

        496KB

      • memory/3548-126-0x00000000004A0000-0x00000000004A1000-memory.dmp
        Filesize

        4KB

      • memory/3548-127-0x00000000008F0000-0x0000000000969000-memory.dmp
        Filesize

        484KB

      • memory/3548-124-0x00000000005C0000-0x00000000005C1000-memory.dmp
        Filesize

        4KB

      • memory/3548-115-0x0000000000000000-mapping.dmp
      • memory/3996-116-0x0000000000000000-mapping.dmp