Analysis

  • max time kernel
    420s
  • max time network
    421s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-10-2024 09:39

General

  • Target

    remcos_a.exe

  • Size

    469KB

  • MD5

    285656e57001e3aeafcf8a88529a3de6

  • SHA1

    c4f53e6f8ed42c1c5cda0bb79c50c1913e00d7d5

  • SHA256

    58f4cc11fbdc77c519550d82efc187dc282e2830dcb6240f7d9d118a53656d0e

  • SHA512

    7f158c9b9a8331a5fb189fa8d2115d96459e1a8f30f5bae503754874b81e67c5620a080125e420722780895c9515511f4e1fa3f016c711bc058e7a64eba336d4

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS9Gn9:uiLJbpI7I2WhQqZ7s9

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

    DllSetup.exe

  • copy_folder

    dllplugins

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    false

  • install_flag

    true

  • install_path

    %WinDir%\System32

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-AB5LV3

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • HawkEye

    HawkEye is a malware kit that has seen continuous development since at least 2013.

  • Remcos

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

  • 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
  • Drops file in System32 directory 13 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 15 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 6 IoCs

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

  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Modifies registry class 38 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos_a.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:1224
    • 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:628
      • 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:1120
    • 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:320
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\dllplugins\DllSetup.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1384
        • C:\Windows\SysWOW64\dllplugins\DllSetup.exe
          C:\Windows\SysWOW64\dllplugins\DllSetup.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:2416
          • 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:4728
            • 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:4060
          • \??\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
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2656
            • 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:832
              • 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:1528
            • C:\Windows\SysWOW64\svchost.exe
              svchost.exe
              6⤵
                PID:3464
              • C:\Windows\SysWOW64\dxdiag.exe
                "C:\Windows\System32\dxdiag.exe" /t C:\Users\Admin\AppData\Local\Temp\sysinfo.txt
                6⤵
                • Drops file in System32 directory
                • System Location Discovery: System Language Discovery
                • Checks SCSI registry key(s)
                • Modifies registry class
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of SetWindowsHookEx
                PID:1484
              • C:\Windows\SysWOW64\cmd.exe
                cmd.exe
                6⤵
                • System Location Discovery: System Language Discovery
                • Suspicious use of WriteProcessMemory
                PID:228
                • C:\Windows\SysWOW64\ipconfig.exe
                  ipconfig
                  7⤵
                  • System Location Discovery: System Language Discovery
                  • Gathers network information
                  PID:4136
              • C:\Windows\SysWOW64\WScript.exe
                "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\jcqfbglzo.vbs"
                6⤵
                • System Location Discovery: System Language Discovery
                PID:1068

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      536B

      MD5

      19523a09e476e3d57c6c545a1a18b85d

      SHA1

      b51dacc3bdcffc59aee76a8d5227030e71e96118

      SHA256

      351ff79dc392c547e1eb23371fd3e740fcb6e9d2a9ab2ab123ec0ebe7bea4517

      SHA512

      d18216d67c1195118e97a78e0a7267f680eb42ae7410d93a45fb66cca9489fb683edd2e51670df67e9d2895e9c97003a8199757d15829edaf0af5608586a2ab4

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

      Filesize

      592B

      MD5

      5452bd5af0b348c29aa820dc33c4c416

      SHA1

      5345b05bf5c2be3410725fe7ddf6d05dd2927117

      SHA256

      cd50c9a5a20a2d5b34788e77c25fb711776050900cdba7d6a4a8e8b0244dfc71

      SHA512

      1c50894a9293352634a1e70400469cfe68e30dbd730e91c1434d2cbdfc15d3ee3dec9986caf62848362582a4c610cb6a25629fa94c0bb002c2e3887cc5672bc0

    • C:\Users\Admin\AppData\Local\Temp\sysinfo.txt

      Filesize

      84KB

      MD5

      fe32130ffb58f2ab3ccd1a8709840ecb

      SHA1

      fccee928db9e06af5177d145724a1fc669d17e8c

      SHA256

      98cf84a9f0d5ab04a3681c5f16f45dad110f5e8a76c47c7f1fc483659e15bc7a

      SHA512

      f38e634a7774b3763355b33df29b9123f380cb23c6bfc4533ab1479a6f508cde19e0818c40a3ae6976043e24cbd0cece482f5c6be0cbf47c1de03b3c75112f27

    • C:\Windows\SysWOW64\dllplugins\DllSetup.exe

      Filesize

      469KB

      MD5

      285656e57001e3aeafcf8a88529a3de6

      SHA1

      c4f53e6f8ed42c1c5cda0bb79c50c1913e00d7d5

      SHA256

      58f4cc11fbdc77c519550d82efc187dc282e2830dcb6240f7d9d118a53656d0e

      SHA512

      7f158c9b9a8331a5fb189fa8d2115d96459e1a8f30f5bae503754874b81e67c5620a080125e420722780895c9515511f4e1fa3f016c711bc058e7a64eba336d4

    • memory/1484-39-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-37-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-30-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-40-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-41-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-42-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-38-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-32-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-36-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/1484-31-0x00000000026B0000-0x00000000026B1000-memory.dmp

      Filesize

      4KB

    • memory/2656-23-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-64-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-28-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-25-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-24-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-22-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-19-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-18-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-17-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-16-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-9-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-82-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-11-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-56-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-57-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-10-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-62-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-26-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-63-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-65-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-66-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-67-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-69-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-68-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-70-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-71-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-72-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-73-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-74-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-75-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-77-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-76-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/2656-78-0x0000000001200000-0x000000000127F000-memory.dmp

      Filesize

      508KB

    • memory/3464-14-0x0000000000EE0000-0x0000000000F5F000-memory.dmp

      Filesize

      508KB

    • memory/3464-15-0x0000000000EE0000-0x0000000000F5F000-memory.dmp

      Filesize

      508KB