Analysis

  • max time kernel
    148s
  • max time network
    155s
  • 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, 08:59

General

  • Target

    20.exe

  • Size

    469KB

  • MD5

    da31b3ac7c6dbdc7cff96b4a1e3184b6

  • SHA1

    4dc91cbb417c7ede59aef8cd7b160b0e1859a8ef

  • SHA256

    f5087001c6a93bb8ee4871dab150715e4e5050ea6b4b39e201d9944f598a4549

  • SHA512

    3364db57258bc63da9eea0d1592f387935eae74d69fb0d8f278868484e60af36ab5535d292ec492311119e20df0a1515d879444781ed96148fca26284a595d93

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS7n9:uiLJbpI7I2WhQqZ779

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-WMI44A

  • 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 15 IoCs

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

  • Modifies registry class 2 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 56 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\20.exe
    "C:\Users\Admin\AppData\Local\Temp\20.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:3908
    • 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:2472
      • 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:3980
    • 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:4948
      • 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:1524
        • 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:4504
          • 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:1324
            • 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:3952
          • \??\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: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:4088
            • 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:2056
              • 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:4412
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:660
              • \??\c:\program files (x86)\internet explorer\iexplore.exe
                "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fxvmipwrahhf"
                6⤵
                  PID:224
                • \??\c:\program files (x86)\internet explorer\iexplore.exe
                  "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fxvmipwrahhf"
                  6⤵
                    PID:4176
                  • \??\c:\program files (x86)\internet explorer\iexplore.exe
                    "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\fxvmipwrahhf"
                    6⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious behavior: EnumeratesProcesses
                    PID:796
                  • \??\c:\program files (x86)\internet explorer\iexplore.exe
                    "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\psbxjhhlopzkmxbf"
                    6⤵
                    • Accesses Microsoft Outlook accounts
                    • System Location Discovery: System Language Discovery
                    PID:4248
                  • \??\c:\program files (x86)\internet explorer\iexplore.exe
                    "c:\program files (x86)\internet explorer\iexplore.exe" /stext "C:\Users\Admin\AppData\Local\Temp\rugpjasmcxrpoeprxqf"
                    6⤵
                    • System Location Discovery: System Language Discovery
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2948
                  • C:\Windows\SysWOW64\WScript.exe
                    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\plomfpvycnbziqcjv.vbs"
                    6⤵
                    • System Location Discovery: System Language Discovery
                    PID:408

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\files\scvhost.exe

          Filesize

          469KB

          MD5

          da31b3ac7c6dbdc7cff96b4a1e3184b6

          SHA1

          4dc91cbb417c7ede59aef8cd7b160b0e1859a8ef

          SHA256

          f5087001c6a93bb8ee4871dab150715e4e5050ea6b4b39e201d9944f598a4549

          SHA512

          3364db57258bc63da9eea0d1592f387935eae74d69fb0d8f278868484e60af36ab5535d292ec492311119e20df0a1515d879444781ed96148fca26284a595d93

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

          Filesize

          4KB

          MD5

          17eece3240d08aa4811cf1007cfe2585

          SHA1

          6c10329f61455d1c96e041b6f89ee6260af3bd0f

          SHA256

          7cc0db44c7b23e4894fe11f0d8d84b2a82ad667eb1e3504192f3ba729f9a7903

          SHA512

          a7de8d6322410ec89f76c70a7159645e8913774f38b84aafeeeb9f90dc3b9aa74a0a280d0bb6674790c04a8ff2d059327f02ebfda6c4486778d53b7fc6da6370

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

          Filesize

          502B

          MD5

          b7815a869322588f698d6e86512f23d8

          SHA1

          4dc9f8526a60e74a34a585b441d96d92f8964652

          SHA256

          df8487ab6568d9400d7ba903eaeb0291d80313b617553ceb5f64306fb61e87b1

          SHA512

          c2b7933cb82d7a234390ccbb853fec0bd32d6bbadb9686c1b1e90146106235d6dbb3390342d1566f204d7cef741e7cdbde7d7a2e6dd040eaab1dc58007c4c458

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

          Filesize

          528B

          MD5

          3478bb3d9b1528548baa4ee1de04d269

          SHA1

          92c19b97cd135f38d5964bc079df412a20358927

          SHA256

          684029bc6616d1014d596ca182bc3d6c27973544ea918fc5bf9e174b5333015a

          SHA512

          84f2ce197098abbbfc9f8a8524271f29a693be7e16ca968241c3152276ae72596979f643476d73dc005b7765b90657b2ae47c5946463163a710b682f7772f239

        • memory/660-14-0x0000000000A00000-0x0000000000A7F000-memory.dmp

          Filesize

          508KB

        • memory/660-15-0x0000000000A00000-0x0000000000A7F000-memory.dmp

          Filesize

          508KB

        • memory/796-23-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/796-30-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/796-31-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2948-27-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2948-29-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2948-25-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/4088-17-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-42-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-9-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-20-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-19-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-50-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-46-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-18-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-16-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-11-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-10-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-37-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-39-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-38-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-40-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-41-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-22-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-43-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-44-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4088-45-0x00000000005C0000-0x000000000063F000-memory.dmp

          Filesize

          508KB

        • memory/4248-28-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/4248-26-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/4248-24-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB