Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-11-2024 06:51

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 3 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 21 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 4 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:2644
    • 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:2780
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1044
    • 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:2756
      • 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:2580
    • 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:2464
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {A6FF0921-63FD-4B3D-B471-C0CC03317CA8} S-1-5-21-3290804112-2823094203-3137964600-1000:VORHPBAB\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2152
    • 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:2352
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        3⤵
          PID:1980
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:1684
        • 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:2040
          • 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:572
        • 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:752
      • 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:948
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
          3⤵
            PID:2320
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
            3⤵
            • System Location Discovery: System Language Discovery
            PID:2088
          • 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:2076
            • 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:892
          • 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:304
        • 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:2256
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
            3⤵
              PID:1940
            • C:\Windows\SysWOW64\cmd.exe
              "cmd.exe" /C mkdir "C:\Users\Admin\AppData\Local\Temp\Gemas"
              3⤵
              • System Location Discovery: System Language Discovery
              PID:1704
            • 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:2352
              • 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:2036
            • 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:536

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          520KB

          MD5

          a012b50429830817e338ccb3ff87ee45

          SHA1

          1adc1332eea02d353fcf6e56f2ed9bfbb1bb552c

          SHA256

          2a054c380923161d18419f731c3409307f344b3a69aa1b0f3497d9f8f183da42

          SHA512

          fe23b81061276062ee997c63ea25758c845ee0de6cfba2b17d2c208b9c89170ede2a2b87d48131daeb5a9f1af372a8676934fa1670e70d9754ff5e4ebba67abe

        • memory/948-113-0x0000000000B10000-0x0000000000B96000-memory.dmp

          Filesize

          536KB

        • memory/2256-177-0x0000000001050000-0x00000000010D6000-memory.dmp

          Filesize

          536KB

        • memory/2352-39-0x0000000000B10000-0x0000000000B96000-memory.dmp

          Filesize

          536KB

        • memory/2644-0-0x0000000073EFE000-0x0000000073EFF000-memory.dmp

          Filesize

          4KB

        • memory/2644-1-0x0000000000890000-0x0000000000916000-memory.dmp

          Filesize

          536KB

        • memory/2644-2-0x0000000073EF0000-0x00000000745DE000-memory.dmp

          Filesize

          6.9MB

        • memory/2644-20-0x0000000073EF0000-0x00000000745DE000-memory.dmp

          Filesize

          6.9MB

        • memory/2780-25-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-30-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-11-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

          Filesize

          4KB

        • memory/2780-15-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-10-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-9-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-8-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-16-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-7-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-5-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-4-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-14-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-6-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-17-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-21-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-22-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-23-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-24-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-3-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-26-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-27-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-28-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-29-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-12-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-31-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-32-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-33-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-34-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-35-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-36-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-40-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-41-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-42-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-43-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-63-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-64-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-65-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-66-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-67-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-68-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-69-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-70-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-71-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-72-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2780-73-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB