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Overview

overview

10

Static

static

10

Solara2.0.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    433s
  • max time network
    438s
  • 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, 21:36

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General

  • Target

    Solara2.0.exe

  • Size

    469KB

  • MD5

    48f4a8f633bf5535811c23a81d8d8506

  • SHA1

    c2a98525bfda82421cb8670db223b19acef31f23

  • SHA256

    9ec9c4c81c67d6628d141981a7020bb7ded83b4c40ff693870cd98eaebf74912

  • SHA512

    7903c322d886bcffc06a9310ba451b0f0eac53d2acedf45b544548ae3656ef477b5a03a86d54452d65461957df4c643082338119bdeb0f2303f528daf0642e29

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSOn9:uiLJbpI7I2WhQqZ7O9

Score
10/10
remcosremotehostdiscoveryevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.168.1.56:13970

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Windows32.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-36XJ31

  • 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\Solara2.0.exe
    "C:\Users\Admin\AppData\Local\Temp\Solara2.0.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:4660
    • 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:2796
      • 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:3608
    • 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:2288
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Health\Windows32.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3604
        • C:\Windows\SysWOW64\Health\Windows32.exe
          C:\Windows\SysWOW64\Health\Windows32.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:3572
          • 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:2656
            • 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:4248
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
              PID:2848

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      532B

      MD5

      54092daa1c86c0bb88b02c6c785c3f56

      SHA1

      b18d571d5ae2661afcec864164dcdf504d5f8aa9

      SHA256

      e04f8f0d847b43ce378eb5732fb167cbb18956fa8f0a56d7ccbe1bd3ef66d3ae

      SHA512

      e9ab8db402092945eed036f9c91e2571337d4f68810d3ab7233d90b57b80d4900294ab30310003e006473f9314baf2caa658038b97c7d77a87f431b4f9df771e

      Download Submit

    • C:\Windows\SysWOW64\Health\Windows32.exe
      Filesize

      469KB

      MD5

      48f4a8f633bf5535811c23a81d8d8506

      SHA1

      c2a98525bfda82421cb8670db223b19acef31f23

      SHA256

      9ec9c4c81c67d6628d141981a7020bb7ded83b4c40ff693870cd98eaebf74912

      SHA512

      7903c322d886bcffc06a9310ba451b0f0eac53d2acedf45b544548ae3656ef477b5a03a86d54452d65461957df4c643082338119bdeb0f2303f528daf0642e29

      Download Submit

    • memory/2848-10-0x0000000000C00000-0x0000000000C7F000-memory.dmp

      Filesize

      508KB

      Download

    • memory/2848-9-0x0000000000C00000-0x0000000000C7F000-memory.dmp

      Filesize

      508KB

      Download