Analysis

  • max time kernel
    149s
  • max time network
    132s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 15:13

General

  • Target
    Inventory-List.exe
  • Size 957KB
  • Sample240528-slqeraaa2w
  • SHA256 d25edbacc13d37548e17b535ffe3d88dc1f9419f2c541c9a2dc1b8215cdfb096
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 45.141.215.89:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-UCTP97

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Windows security modification 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Inventory-List.exe
    "C:\Users\Admin\AppData\Local\Temp\Inventory-List.exe"
    1⤵
    • UAC bypass
    • Windows security bypass
    • Checks computer location settings
    • Windows security modification
    • Checks whether UAC is enabled
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:404
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Inventory-List.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:540
    • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
      "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
      2⤵
      • Suspicious use of SetWindowsHookEx
      PID:2648
    • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
      "C:\Program Files (x86)\Windows Media Player\wmplayer.exe"
      2⤵
        PID:4952

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          logs.dat

          • Path C:\ProgramData\remcos\logs.dat
          • Size 144B
          • SHA256 3bb9e54234c76492630de471c5a0606189a7f73839649c7c40e495319ffb3205
          • MD5 SHA1 SHA512

          __PSScriptPolicyTest_qoojzwzs.bcu.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qoojzwzs.bcu.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          memory/404-0-0x000001ED9B030000-0x000001ED9B056000-memory.dmp

          memory/404-3-0x000001ED9CD10000-0x000001ED9CD16000-memory.dmp

          memory/404-4-0x000001EDB57C0000-0x000001EDB5892000-memory.dmp

          memory/404-2-0x00007FFFD8E40000-0x00007FFFD9901000-memory.dmp

          memory/404-30-0x00007FFFD8E40000-0x00007FFFD9901000-memory.dmp

          memory/404-1-0x00007FFFD8E43000-0x00007FFFD8E45000-memory.dmp

          memory/540-25-0x0000023D484A0000-0x0000023D484C2000-memory.dmp

          memory/540-29-0x00007FFFD8E40000-0x00007FFFD9901000-memory.dmp

          memory/540-26-0x00007FFFD8E40000-0x00007FFFD9901000-memory.dmp

          memory/540-14-0x00007FFFD8E43000-0x00007FFFD8E45000-memory.dmp

          memory/540-15-0x00007FFFD8E40000-0x00007FFFD9901000-memory.dmp

          memory/2648-6-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-11-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-13-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-12-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-7-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-34-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-5-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-44-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-45-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-58-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2648-59-0x0000000000400000-0x0000000000482000-memory.dmp