Analysis

  • max time kernel
    299s
  • max time network
    301s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-11-2024 06:41

General

  • Target

    eCertificate_of_Creditable_Tax.exe

  • Size

    520KB

  • MD5

    a012b50429830817e338ccb3ff87ee45

  • SHA1

    1adc1332eea02d353fcf6e56f2ed9bfbb1bb552c

  • SHA256

    2a054c380923161d18419f731c3409307f344b3a69aa1b0f3497d9f8f183da42

  • SHA512

    fe23b81061276062ee997c63ea25758c845ee0de6cfba2b17d2c208b9c89170ede2a2b87d48131daeb5a9f1af372a8676934fa1670e70d9754ff5e4ebba67abe

  • SSDEEP

    12288:MguY0rIobzV2KOPxGkYh+BppwW1xErml3PM5I6SWTmCxr3B9jS:IYDcBrkvr71xEofOIBw9jS

Malware Config

Extracted

Family

remcos

Botnet

HOPE21

C2

uettw81jsq.freedynamicdns.net:6609

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

    remcos

  • mouse_option

    false

  • mutex

    Rmc-EF1FKW

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Remcos family
  • Executes dropped EXE 5 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 6 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 31 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\eCertificate_of_Creditable_Tax.exe
    "C:\Users\Admin\AppData\Local\Temp\eCertificate_of_Creditable_Tax.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2600
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1868
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1796
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1920
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2608
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\eCertificate_of_Creditable_Tax.exe" "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2392
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {458C9925-1CA3-4BD9-AEC2-6F024E66D7E8} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2776
    • C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
      C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2660
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        3⤵
          PID:2568
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:3032
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2516
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:1148
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe" "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:2736
      • C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
        C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        PID:2160
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
          3⤵
            PID:1144
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
            3⤵
            • System Location Discovery: System Language Discovery
            PID:1844
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
            3⤵
            • System Location Discovery: System Language Discovery
            PID:1472
            • C:\Windows\SysWOW64\schtasks.exe
              schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
              4⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1480
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe" "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe"
            3⤵
            • System Location Discovery: System Language Discovery
            PID:916
        • C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
          C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
          2⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          PID:2528
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
            3⤵
              PID:1888
            • C:\Windows\SysWOW64\cmd.exe
              "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
              3⤵
              • System Location Discovery: System Language Discovery
              PID:2380
            • C:\Windows\SysWOW64\cmd.exe
              "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
              3⤵
              • System Location Discovery: System Language Discovery
              PID:3060
              • C:\Windows\SysWOW64\schtasks.exe
                schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
                4⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:1856
            • C:\Windows\SysWOW64\cmd.exe
              "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe" "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe"
              3⤵
              • System Location Discovery: System Language Discovery
              PID:2848
          • C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
            C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
            2⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            PID:1636
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
              3⤵
                PID:1844
              • C:\Windows\SysWOW64\cmd.exe
                "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
                3⤵
                • System Location Discovery: System Language Discovery
                PID:2436
              • C:\Windows\SysWOW64\cmd.exe
                "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
                3⤵
                • System Location Discovery: System Language Discovery
                PID:1428
                • C:\Windows\SysWOW64\schtasks.exe
                  schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
                  4⤵
                  • System Location Discovery: System Language Discovery
                  • Scheduled Task/Job: Scheduled Task
                  PID:2520
              • C:\Windows\SysWOW64\cmd.exe
                "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe" "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe"
                3⤵
                • System Location Discovery: System Language Discovery
                PID:1924
            • C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
              C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe
              2⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              PID:1928
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
                "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
                3⤵
                  PID:1552
                • C:\Windows\SysWOW64\cmd.exe
                  "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  PID:2260
                • C:\Windows\SysWOW64\cmd.exe
                  "cmd.exe" /C schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
                  3⤵
                  • System Location Discovery: System Language Discovery
                  PID:2332
                  • C:\Windows\SysWOW64\schtasks.exe
                    schtasks /create /sc minute /mo 1 /tn "Nafifas" /tr "'C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe'" /f
                    4⤵
                    • System Location Discovery: System Language Discovery
                    • Scheduled Task/Job: Scheduled Task
                    PID:1736
                • C:\Windows\SysWOW64\cmd.exe
                  "cmd.exe" /C copy "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe" "C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe"
                  3⤵
                  • System Location Discovery: System Language Discovery
                  PID:2872

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\Gemas\Gemas.exe

              Filesize

              520KB

              MD5

              a012b50429830817e338ccb3ff87ee45

              SHA1

              1adc1332eea02d353fcf6e56f2ed9bfbb1bb552c

              SHA256

              2a054c380923161d18419f731c3409307f344b3a69aa1b0f3497d9f8f183da42

              SHA512

              fe23b81061276062ee997c63ea25758c845ee0de6cfba2b17d2c208b9c89170ede2a2b87d48131daeb5a9f1af372a8676934fa1670e70d9754ff5e4ebba67abe

            • memory/1636-247-0x00000000010A0000-0x0000000001126000-memory.dmp

              Filesize

              536KB

            • memory/1868-64-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-31-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-5-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-18-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-20-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-17-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

              Filesize

              4KB

            • memory/1868-13-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-11-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-9-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-7-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-3-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-15-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-21-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-22-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-53-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-68-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-72-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-29-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-30-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-69-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-32-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-33-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-54-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-4-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-71-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-55-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-56-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-57-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-58-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-59-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-60-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-61-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-62-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-63-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-70-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-65-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-66-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/1868-67-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2160-103-0x0000000000120000-0x00000000001A6000-memory.dmp

              Filesize

              536KB

            • memory/2528-175-0x00000000010A0000-0x0000000001126000-memory.dmp

              Filesize

              536KB

            • memory/2568-50-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

              Filesize

              4KB

            • memory/2600-0-0x0000000073EFE000-0x0000000073EFF000-memory.dmp

              Filesize

              4KB

            • memory/2600-2-0x0000000073EF0000-0x00000000745DE000-memory.dmp

              Filesize

              6.9MB

            • memory/2600-25-0x0000000073EF0000-0x00000000745DE000-memory.dmp

              Filesize

              6.9MB

            • memory/2600-1-0x00000000012A0000-0x0000000001326000-memory.dmp

              Filesize

              536KB

            • memory/2660-28-0x0000000000110000-0x0000000000196000-memory.dmp

              Filesize

              536KB