Analysis

  • max time kernel
    430s
  • max time network
    432s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-11-2024 10:31

General

  • Target

    stub.exe

  • Size

    469KB

  • MD5

    e7be6cad5e537ccd392c2a1aefa60ee7

  • SHA1

    324b9688a5d8c39f5e96e41f451cfc9a225d48d2

  • SHA256

    8c7a4657ea68a69f364c8acb1881aa6e0f8140d3aba9a917f484ba6ec705db21

  • SHA512

    0fc526f228ace907e580433d7e85e170ebfdc1eae24cf21d2e35568007f30abf517de2c215b1718ed31787e0ebfdafd89f11e6214f09f01492f75fe209c09037

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS0n9:uiLJbpI7I2WhQqZ709

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

else-directors.gl.at.ply.gg:56448

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    Bitdefender.exe

  • copy_folder

    Bitdefender

  • delete_file

    true

  • hide_file

    true

  • 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-XTM51M

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    VisualStudioServer

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Remcos family
  • 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
  • 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 12 IoCs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies registry class 2 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 34 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\stub.exe
    "C:\Users\Admin\AppData\Local\Temp\stub.exe"
    1⤵
    • Adds policy Run key to start application
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1784
    • 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:4908
      • 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:3508
    • 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:1544
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Bitdefender\Bitdefender.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1952
        • C:\ProgramData\Bitdefender\Bitdefender.exe
          C:\ProgramData\Bitdefender\Bitdefender.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:2360
          • 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:1292
            • 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:1596
          • \??\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
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2452
            • 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:4964
              • 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:3284
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:2008
              • C:\Windows\SysWOW64\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\fpnoktasayirroucczubhkoyp.vbs"
                6⤵
                • System Location Discovery: System Language Discovery
                PID:2164
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /4
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:320

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\Bitdefender\Bitdefender.exe

      Filesize

      469KB

      MD5

      e7be6cad5e537ccd392c2a1aefa60ee7

      SHA1

      324b9688a5d8c39f5e96e41f451cfc9a225d48d2

      SHA256

      8c7a4657ea68a69f364c8acb1881aa6e0f8140d3aba9a917f484ba6ec705db21

      SHA512

      0fc526f228ace907e580433d7e85e170ebfdc1eae24cf21d2e35568007f30abf517de2c215b1718ed31787e0ebfdafd89f11e6214f09f01492f75fe209c09037

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

      Filesize

      580B

      MD5

      3acb59fed7a8eb82ab2dafe7964abe36

      SHA1

      a18fe9a9e10edc38c8f326a254f643892d24e2d4

      SHA256

      e01b68ba47caab4271202c88172dfd0f3917c9c034a8f0188430388e1c6f9dde

      SHA512

      c483d1f9cb129d3b99af543a888133c98a779332a522fb0860255c34782f97bb0028153195b39c9300d00ff5b6e93b4aa57aef820dad3a63ed52be930a052ef5

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

      Filesize

      526B

      MD5

      97c3d0c687f8fce413698cb3cd93a436

      SHA1

      457bdaecd0ed1a105efa42d31ba7737e5f71d76d

      SHA256

      d133a68455e1837b70a85cce64e82d69f9cf8b04554c84b592bfe1fd97f98860

      SHA512

      1a417f68919258c14f5f467533af7f84fdd42bbf5005ba5a1fe744cd08298c2b818f3362f4dacedc23da991f931caceccdfadab978d1b916a03906669276cfe3

    • memory/320-34-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-31-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-32-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-33-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-28-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-30-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-29-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-22-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-24-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/320-23-0x000001BCD3F30000-0x000001BCD3F31000-memory.dmp

      Filesize

      4KB

    • memory/2008-14-0x0000000000C30000-0x0000000000CAF000-memory.dmp

      Filesize

      508KB

    • memory/2008-15-0x0000000000C30000-0x0000000000CAF000-memory.dmp

      Filesize

      508KB

    • memory/2452-19-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-41-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-18-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-17-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-16-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-11-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-10-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-35-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-36-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-37-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-38-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-39-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-40-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-21-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-42-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-43-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-44-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-45-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-46-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-47-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-48-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-49-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-50-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-51-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-52-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-53-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-57-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2452-9-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB