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Resubmissions

09/01/2025, 18:14

250109-wvn5tsypak 10

26/09/2024, 07:17

240926-h4renaxbrg 10

Analysis

  • max time kernel
    149s
  • max time network
    140s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241211-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    09/01/2025, 18:14

General

  • Target

    TNT invoice 9.26.2024 .exe

  • Size

    881KB

  • MD5

    7afd5be4b77090388ddecb8169cf0bc3

  • SHA1

    d3b6ba2e53aed1471c12196c577b7be56d14cf2f

  • SHA256

    68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

  • SHA512

    2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

  • SSDEEP

    24576:VE8AE9lxicGLP0CDyB/1FNlUcDos713jb:VExsxiTVe1F/UcDosVb

Malware Config

Extracted

Family

remcos

Botnet

IRN

C2

irnserv1.ddns.net:4424

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-CA8761

  • 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
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 8 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
    "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:60
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2828
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF6A4.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:5100
    • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
      "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
      2⤵
        PID:4192
      • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
        "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
        2⤵
          PID:4136
        • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
          "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
          2⤵
            PID:2388
          • C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe
            "C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"
            2⤵
            • Checks computer location settings
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:4216
            • C:\ProgramData\Remcos\remcos.exe
              "C:\ProgramData\Remcos\remcos.exe"
              3⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:1572
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
                4⤵
                • Command and Scripting Interpreter: PowerShell
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1888
              • C:\Windows\SysWOW64\schtasks.exe
                "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2D74.tmp"
                4⤵
                • System Location Discovery: System Language Discovery
                • Scheduled Task/Job: Scheduled Task
                PID:3812
              • C:\ProgramData\Remcos\remcos.exe
                "C:\ProgramData\Remcos\remcos.exe"
                4⤵
                • Executes dropped EXE
                • Adds Run key to start application
                • System Location Discovery: System Language Discovery
                • Suspicious use of SetWindowsHookEx
                PID:3344

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\Remcos\logs.dat

          Filesize

          144B

          MD5

          434ad60812b2cb1d325cfee0ded9f6b4

          SHA1

          adcd8390170d94e0d1d9dec1326a0d78b3ef3e42

          SHA256

          8a70b1e70798253580946064bbb204a913ccd3b123a5205bf16f1176c80f1ebf

          SHA512

          56241385a1e14a95f45ff774b36a36d7328d7efd750494153a61f8379190c57b60b7a0b60f5c90ac86db0d044065bb7e7010b9bb65733e8bfb16fd1e1a96319a

        • C:\ProgramData\Remcos\remcos.exe

          Filesize

          881KB

          MD5

          7afd5be4b77090388ddecb8169cf0bc3

          SHA1

          d3b6ba2e53aed1471c12196c577b7be56d14cf2f

          SHA256

          68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

          SHA512

          2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

          Filesize

          2KB

          MD5

          f9349064c7c8f8467cc12d78a462e5f9

          SHA1

          5e1d27fc64751cd8c0e9448ee47741da588b3484

          SHA256

          883481fe331cb89fb6061e76b43acd4dd638c16f499b10088b261036c6d0547b

          SHA512

          3229668491b5e4068e743b31f2896b30b1842faf96aff09fad01b08771c2f11eb8d8f02a3b76e31f0d6ad650c2894c5ac1822204e132c03d9c2b8df6ca4cd7cf

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          21KB

          MD5

          bed47656915cd7ff7ba11120b5bbb195

          SHA1

          ec415f01efcc1751984e7564ad95dd422aae27ef

          SHA256

          5bbfd8fb7cb002c0c55897ed8055dccc44e2d4024f69c88daa4ee0387db2aa71

          SHA512

          c7dc292d610526fab71717c417d15cefb1ae5239425e0e7f1da82f9307066431d0ef6e47d641acf17bfdb2cad8af38fd9bafed03e23ea8013c3d7d7926aed8ee

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1k5votfi.ubr.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\tmpF6A4.tmp

          Filesize

          1KB

          MD5

          99ea069363cc8a6198962c359d662ac9

          SHA1

          88153c7f272c85e62cdd00aabb4328dc4e0fe5df

          SHA256

          358ec15f1cd292e738b2c9a4ddd1975f06320b8faf407cb97b0656c5888b18b8

          SHA512

          834cce5e350c9a77f85d5d75270df1d72f7623f1ec6da1dde6f5fec4f9631b779589ec1aa2bf79f1c4c8b4e81553f52954200dd71d834b739f01d413e973af7a

        • memory/60-10-0x0000000009DE0000-0x0000000009E7C000-memory.dmp

          Filesize

          624KB

        • memory/60-4-0x0000000005190000-0x000000000519A000-memory.dmp

          Filesize

          40KB

        • memory/60-8-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/60-9-0x00000000076A0000-0x0000000007760000-memory.dmp

          Filesize

          768KB

        • memory/60-0-0x00000000751DE000-0x00000000751DF000-memory.dmp

          Filesize

          4KB

        • memory/60-6-0x00000000071F0000-0x0000000007200000-memory.dmp

          Filesize

          64KB

        • memory/60-5-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/60-23-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/60-1-0x00000000006F0000-0x00000000007D2000-memory.dmp

          Filesize

          904KB

        • memory/60-2-0x0000000005790000-0x0000000005D36000-memory.dmp

          Filesize

          5.6MB

        • memory/60-7-0x00000000751DE000-0x00000000751DF000-memory.dmp

          Filesize

          4KB

        • memory/60-3-0x00000000051E0000-0x0000000005272000-memory.dmp

          Filesize

          584KB

        • memory/1888-81-0x0000000005C40000-0x0000000005F97000-memory.dmp

          Filesize

          3.3MB

        • memory/1888-83-0x0000000006350000-0x000000000639C000-memory.dmp

          Filesize

          304KB

        • memory/1888-84-0x0000000072890000-0x00000000728DC000-memory.dmp

          Filesize

          304KB

        • memory/1888-94-0x00000000073B0000-0x0000000007453000-memory.dmp

          Filesize

          652KB

        • memory/2828-26-0x0000000005810000-0x0000000005876000-memory.dmp

          Filesize

          408KB

        • memory/2828-55-0x00000000071B0000-0x00000000071CA000-memory.dmp

          Filesize

          104KB

        • memory/2828-25-0x0000000005010000-0x0000000005076000-memory.dmp

          Filesize

          408KB

        • memory/2828-12-0x00000000024A0000-0x00000000024D6000-memory.dmp

          Filesize

          216KB

        • memory/2828-36-0x0000000005880000-0x0000000005BD7000-memory.dmp

          Filesize

          3.3MB

        • memory/2828-14-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/2828-15-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/2828-40-0x0000000005E90000-0x0000000005EDC000-memory.dmp

          Filesize

          304KB

        • memory/2828-39-0x0000000005E40000-0x0000000005E5E000-memory.dmp

          Filesize

          120KB

        • memory/2828-42-0x0000000072880000-0x00000000728CC000-memory.dmp

          Filesize

          304KB

        • memory/2828-52-0x0000000007020000-0x000000000703E000-memory.dmp

          Filesize

          120KB

        • memory/2828-41-0x0000000007040000-0x0000000007072000-memory.dmp

          Filesize

          200KB

        • memory/2828-53-0x0000000007080000-0x0000000007123000-memory.dmp

          Filesize

          652KB

        • memory/2828-24-0x0000000004F70000-0x0000000004F92000-memory.dmp

          Filesize

          136KB

        • memory/2828-54-0x00000000077F0000-0x0000000007E6A000-memory.dmp

          Filesize

          6.5MB

        • memory/2828-56-0x0000000007210000-0x000000000721A000-memory.dmp

          Filesize

          40KB

        • memory/2828-57-0x0000000007420000-0x00000000074B6000-memory.dmp

          Filesize

          600KB

        • memory/2828-60-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/2828-17-0x00000000751D0000-0x0000000075981000-memory.dmp

          Filesize

          7.7MB

        • memory/2828-16-0x0000000005090000-0x000000000575A000-memory.dmp

          Filesize

          6.8MB

        • memory/3344-69-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/3344-66-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/3344-71-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4216-18-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4216-19-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4216-38-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4216-21-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4216-22-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB