Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/09/2024, 21:37

General

  • Target

    Solara3.0.exe

  • Size

    469KB

  • MD5

    78cc68b05b96757337bd5cf262c00b7a

  • SHA1

    f3ecae5e0edbf728092e49f28609610c3fefec46

  • SHA256

    5cadbdb3c936e6e75c4314aa7c9b815f3507135957bac00dc95ba5a5a61abcb8

  • SHA512

    b1fa4d3621adeb59934f9c89c066510d6b04d823c23180922222e6a68796515558af763c99ca5ca8d4467896dd6546aabb3d4d682e69f53dabeb49cfa69a2b93

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSTn9:uiLJbpI7I2WhQqZ7T9

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

accessories-retrieve.gl.at.ply.gg:13970

192.168.1.56:13970

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Solara2.exe

  • copy_folder

    Health

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%\System32

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    filer32

  • keylog_path

    %WinDir%\System32

  • mouse_option

    false

  • mutex

    Rmc-VK27G6

  • screenshot_crypt

    true

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %WinDir%\System32

  • screenshot_time

    10

  • startup_value

    WindowsHealth

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 3 IoCs
  • Adds policy Run key to start application 2 TTPs 6 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Drops file in System32 directory 6 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 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 11 IoCs

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

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Solara3.0.exe
    "C:\Users\Admin\AppData\Local\Temp\Solara3.0.exe"
    1⤵
    • Adds policy Run key to start application
    • Checks computer location settings
    • Adds Run key to start application
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4744
      • C:\Windows\SysWOW64\reg.exe
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • UAC bypass
        • System Location Discovery: System Language Discovery
        • Modifies registry key
        PID:3112
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:468
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Health\Solara2.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1900
        • C:\Windows\SysWOW64\Health\Solara2.exe
          C:\Windows\SysWOW64\Health\Solara2.exe
          4⤵
          • Adds policy Run key to start application
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:4772
          • C:\Windows\SysWOW64\cmd.exe
            /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:2152
            • C:\Windows\SysWOW64\reg.exe
              C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • UAC bypass
              • System Location Discovery: System Language Discovery
              • Modifies registry key
              PID:4856
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
            • Adds policy Run key to start application
            • Adds Run key to start application
            • Drops file in System32 directory
            • Sets desktop wallpaper using registry
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SendNotifyMessage
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3972
            • C:\Windows\SysWOW64\cmd.exe
              /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
              6⤵
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:1772
              • C:\Windows\SysWOW64\reg.exe
                C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
                7⤵
                • UAC bypass
                • System Location Discovery: System Language Discovery
                • Modifies registry key
                PID:392
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:2832

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\638212528946203815.png

      Filesize

      32KB

      MD5

      4baefc9083a6e68e1cec28edaf5c32dc

      SHA1

      018e647235d38003fe446d5cc0fcd4ad54d68b7e

      SHA256

      437d48501551725b3e13c33f0a2fa0cf2b3b6c766f8570ef587e70e083a75b4e

      SHA512

      83704d109a2b03ed75cde5c33628baec0f93dba03a2b6cd449dc2876916dabf50d22e867f0b6020787fc1dd8ab7de9326d68e6091881fd3bb4b03a30b63308ba

    • C:\Users\Admin\AppData\Local\Temp\install.vbs

      Filesize

      528B

      MD5

      9fdc1fab4ac329ed44834a7107e01586

      SHA1

      31e1fdb32b2362bd4c6c763447921b79ff8356e7

      SHA256

      e451e71bcf8cfa2f5d0587427cc1d8de37f0a463504dd6c95be3fde0a70bfb94

      SHA512

      3b4d7958ec9757cd4a0e5cea025f0fb9419c058917d4772df06b271de5c48a544cf00f49dbf5d05ad7578ee97267ea4da5f83bcee223e8c01db86996fa9c3df6

    • C:\Windows\SysWOW64\Health\Solara2.exe

      Filesize

      469KB

      MD5

      78cc68b05b96757337bd5cf262c00b7a

      SHA1

      f3ecae5e0edbf728092e49f28609610c3fefec46

      SHA256

      5cadbdb3c936e6e75c4314aa7c9b815f3507135957bac00dc95ba5a5a61abcb8

      SHA512

      b1fa4d3621adeb59934f9c89c066510d6b04d823c23180922222e6a68796515558af763c99ca5ca8d4467896dd6546aabb3d4d682e69f53dabeb49cfa69a2b93

    • C:\Windows\SysWOW64\filer32\logs.dat

      Filesize

      346B

      MD5

      f6310a0e4119a87850471a2ff1f94d69

      SHA1

      23c0e3492f425bcf865ce7efd30f2adb12ad3373

      SHA256

      a6cb3c98db2fbd8d94aae644cebcb4d5822123d874400e5bc04ab142971f6952

      SHA512

      32ebf24caa9b1a8fc6d9c10788a08dc92b2f8e2d0eddb165905f35acb3448e100b5c6efa41aa7da057c88c7f602abff175ffb3e2ab05b93d0577b1e5d1e52a98

    • memory/2832-19-0x00000000010C0000-0x000000000113F000-memory.dmp

      Filesize

      508KB

    • memory/2832-20-0x00000000010C0000-0x000000000113F000-memory.dmp

      Filesize

      508KB

    • memory/3972-51-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-58-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-16-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-21-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-23-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-24-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-25-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-35-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-36-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-37-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-38-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-11-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-42-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-46-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-49-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-50-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-10-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-53-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-55-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-12-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-9-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-64-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-63-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-66-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-67-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-68-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-70-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-73-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-74-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-81-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-82-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-87-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-90-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-91-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-97-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-96-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-98-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB

    • memory/3972-99-0x0000000000E00000-0x0000000000E7F000-memory.dmp

      Filesize

      508KB