Overview

overview

10

Static

static

10

remcos.exe

windows7-x64

10

remcos.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-11-2024 17:23

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General

  • Target

    remcos.exe

  • Size

    469KB

  • MD5

    e0a193382a236af12dfaf3d1914c6ec5

  • SHA1

    1931c500aead108e6c9b3626c456ff283af87b55

  • SHA256

    036d32579d1986bae981d1a1259c6911c4014d18c04687f5c607597cc13703ab

  • SHA512

    09c3d300b15d4e7f94943a741eda611f10764ebbdbad649052093974f427bce5cbad4ef1cdca6784b7bb6e7a9b4f5abbf5f6b46b3deab55786e2c8d615b85511

  • SSDEEP

    12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSOn9:uiLJbpI7I2WhQqZ7O9

Score
10/10
remcosremotehostdiscoveryevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

lesbian-failures.gl.at.ply.gg:11241

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    SecurityHealthSystray.exe

  • copy_folder

    SecurityHealthSystray

  • 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-FGMZB0

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    SecurityHealthSystray.exe

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

    ratremcos
  • Remcos family
    remcos
  • 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
  • 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\remcos.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos.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:1996
    • 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:3268
      • 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:3252
    • 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:116
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:736
        • C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.exe
          C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.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:4052
          • 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:1012
            • 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:4328
          • \??\c:\program files (x86)\internet explorer\iexplore.exe
            "c:\program files (x86)\internet explorer\iexplore.exe"
            5⤵
              PID:4876

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

    • C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.exe
      Filesize

      469KB

      MD5

      e0a193382a236af12dfaf3d1914c6ec5

      SHA1

      1931c500aead108e6c9b3626c456ff283af87b55

      SHA256

      036d32579d1986bae981d1a1259c6911c4014d18c04687f5c607597cc13703ab

      SHA512

      09c3d300b15d4e7f94943a741eda611f10764ebbdbad649052093974f427bce5cbad4ef1cdca6784b7bb6e7a9b4f5abbf5f6b46b3deab55786e2c8d615b85511

      Download Submit

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

      570B

      MD5

      75c64d16d4ce64e11e0919abe80b8b5b

      SHA1

      bfb672540cdc1314bcddaf1ca45aa3e84c81e7be

      SHA256

      b5300b5bc44eb79035d4d8b3fc0c80dd9ffaec219bae20897fb2606c79137b98

      SHA512

      f4a835e9e66bdc00c112a365677022045554d4ab5052e1c0d88c329018b68316232a575a3ee15a5807bd73c4f51a261c976696f710a4300f99bbd6a6a716327e

      Download Submit

    • memory/4876-9-0x0000000000B50000-0x0000000000BCF000-memory.dmp

      Filesize

      508KB

      Download

    • memory/4876-10-0x0000000000B50000-0x0000000000BCF000-memory.dmp

      Filesize

      508KB

      Download