Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/10/2024, 09:03

General

  • Target

    15.exe

  • Size

    469KB

  • MD5

    b22ad7c19d9be804fa14370318c42ebb

  • SHA1

    70eb106c8df97eb8fb5fd6e7532c849624151ca3

  • SHA256

    7517b5d6b373982ef7e97b3480a7b6467c79c628f096a257732eb2a5ca2f0878

  • SHA512

    9c0467d165ed5d6db83ca6a9bbc02478ba68a20bdf4a41e021f4df7efcf334f8dc586ed8099997b5ce55a1466e155d9bececf225aa5d5093d7aae236ec6a901b

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSVn9:uiLJbpI7I2WhQqZ7V9

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

core-hook.gl.at.ply.gg:7242

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    scvhost.exe

  • copy_folder

    files

  • 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-UT6TD2

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    scvhost

  • 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
  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • 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
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 14 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: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\15.exe
    "C:\Users\Admin\AppData\Local\Temp\15.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:3944
    • 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:5004
      • 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:4028
    • 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:2748
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\files\scvhost.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4920
        • C:\ProgramData\files\scvhost.exe
          C:\ProgramData\files\scvhost.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: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:2856
          • 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:4656
            • 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:1180
          • \??\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
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:4032
            • 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:3244
              • 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:5072
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:1872
              • \??\c:\program files (x86)\internet explorer\iexplore.exe
                "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\vavgnzncbok"
                6⤵
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                PID:4056
              • \??\c:\program files (x86)\internet explorer\iexplore.exe
                "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\ycazorxvpwcsku"
                6⤵
                • Accesses Microsoft Outlook accounts
                • System Location Discovery: System Language Discovery
                PID:4232
              • \??\c:\program files (x86)\internet explorer\iexplore.exe
                "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\iwfkpkixdeuxvajigh"
                6⤵
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1792

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\files\scvhost.exe

      Filesize

      469KB

      MD5

      b22ad7c19d9be804fa14370318c42ebb

      SHA1

      70eb106c8df97eb8fb5fd6e7532c849624151ca3

      SHA256

      7517b5d6b373982ef7e97b3480a7b6467c79c628f096a257732eb2a5ca2f0878

      SHA512

      9c0467d165ed5d6db83ca6a9bbc02478ba68a20bdf4a41e021f4df7efcf334f8dc586ed8099997b5ce55a1466e155d9bececf225aa5d5093d7aae236ec6a901b

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

      Filesize

      502B

      MD5

      36eda1a0df3669c86bfe96d150f1562e

      SHA1

      4acb5259ab18dcf61407aab9f626038cf9ff3260

      SHA256

      56419009641e66b0c8b6a1aec38a207d4e1c42a6a96ae6f9bd2def3472bc1138

      SHA512

      4c151e3945457810db1737d49347fa96d1f7c068b3e2ef21211405cfb3db5a7bca90ed793a4f380c48c296097d931cb5b7484c99da78875c12af02ed0b445998

    • C:\Users\Admin\AppData\Local\Temp\vavgnzncbok

      Filesize

      4KB

      MD5

      17eece3240d08aa4811cf1007cfe2585

      SHA1

      6c10329f61455d1c96e041b6f89ee6260af3bd0f

      SHA256

      7cc0db44c7b23e4894fe11f0d8d84b2a82ad667eb1e3504192f3ba729f9a7903

      SHA512

      a7de8d6322410ec89f76c70a7159645e8913774f38b84aafeeeb9f90dc3b9aa74a0a280d0bb6674790c04a8ff2d059327f02ebfda6c4486778d53b7fc6da6370

    • memory/1792-27-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1792-28-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1792-30-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1872-15-0x0000000000150000-0x00000000001CF000-memory.dmp

      Filesize

      508KB

    • memory/1872-14-0x0000000000150000-0x00000000001CF000-memory.dmp

      Filesize

      508KB

    • memory/4032-17-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-10-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-20-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-19-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-22-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-45-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-44-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-43-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-16-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-40-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-11-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-18-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-42-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-41-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-9-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-37-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-38-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4032-39-0x0000000000F50000-0x0000000000FCF000-memory.dmp

      Filesize

      508KB

    • memory/4056-25-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4056-31-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4056-23-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4232-26-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/4232-29-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB

    • memory/4232-24-0x0000000000400000-0x0000000000457000-memory.dmp

      Filesize

      348KB