Overview

overview

10

Static

static

10

Solara3.0.exe

windows7-x64

10

Solara3.0.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240910-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240910-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-09-2024 21:45

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General

  • Target

    Solara3.0.exe

  • Size

    469KB

  • MD5

    78cc68b05b96757337bd5cf262c00b7a

  • SHA1

    f3ecae5e0edbf728092e49f28609610c3fefec46

  • SHA256

    5cadbdb3c936e6e75c4314aa7c9b815f3507135957bac00dc95ba5a5a61abcb8

  • SHA512

    b1fa4d3621adeb59934f9c89c066510d6b04d823c23180922222e6a68796515558af763c99ca5ca8d4467896dd6546aabb3d4d682e69f53dabeb49cfa69a2b93

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSTn9:uiLJbpI7I2WhQqZ7T9

Score
10/10
remcosremotehostdiscoveryevasionpersistencerattrojan

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.

    ratremcos
  • UAC bypass 3 TTPs 2 IoCs
    evasiontrojan
  • Adds policy Run key to start application 2 TTPs 4 IoCs
    persistence
  • 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 4 IoCs
    persistence
  • Drops file in System32 directory 3 IoCs
  • Suspicious use of SetThreadContext 1 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.

    discovery
  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 2 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 25 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:4276
    • 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:4996
      • 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:3968
    • 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:724
      • 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:2200
        • 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:4612
          • 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:1744
            • 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:624
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
              PID:536

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

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

      528B

      MD5

      9fdc1fab4ac329ed44834a7107e01586

      SHA1

      31e1fdb32b2362bd4c6c763447921b79ff8356e7

      SHA256

      e451e71bcf8cfa2f5d0587427cc1d8de37f0a463504dd6c95be3fde0a70bfb94

      SHA512

      3b4d7958ec9757cd4a0e5cea025f0fb9419c058917d4772df06b271de5c48a544cf00f49dbf5d05ad7578ee97267ea4da5f83bcee223e8c01db86996fa9c3df6

      Download Submit

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

      469KB

      MD5

      78cc68b05b96757337bd5cf262c00b7a

      SHA1

      f3ecae5e0edbf728092e49f28609610c3fefec46

      SHA256

      5cadbdb3c936e6e75c4314aa7c9b815f3507135957bac00dc95ba5a5a61abcb8

      SHA512

      b1fa4d3621adeb59934f9c89c066510d6b04d823c23180922222e6a68796515558af763c99ca5ca8d4467896dd6546aabb3d4d682e69f53dabeb49cfa69a2b93

      Download Submit

    • memory/536-9-0x0000000000840000-0x00000000008BF000-memory.dmp

      Filesize

      508KB

      Download

    • memory/536-10-0x0000000000840000-0x00000000008BF000-memory.dmp

      Filesize

      508KB

      Download