Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/10/2024, 05:57

General

  • Target
    673d693b0c8b68503d64ed15fd863d61.exe
  • Size 1017KB
  • Sample241004-gnlnsssand
  • SHA256 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • IRN

C2
  • irnserv1.ddns.net:4424

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

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-CA8761

  • 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.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 4 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 8 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe
    "C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4552
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1400
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA3B2.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3404
    • C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe
      "C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3580
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:648
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4264
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDA33.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:3000
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:5100
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:860
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:2104

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        logs.dat

        • Path C:\ProgramData\Remcos\logs.dat
        • Size 144B
        • SHA256 637dc4c4921b1d86033120731403a82c28e87d52da489bb90e2878cb4ad488d7
        • MD5 SHA1 SHA512

        remcos.exe

        • Path C:\ProgramData\Remcos\remcos.exe
        • Size 1017KB
        • SHA256 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
        • MD5 SHA1 SHA512 SSDEEP

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 18KB
        • SHA256 10d262e304d623da125dda0cb5f50ddab1cfdfbf563a96f32a1d89a212dc72d0
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_dqht01o5.uwr.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dqht01o5.uwr.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        tmpA3B2.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmpA3B2.tmp
        • Size 1KB
        • SHA256 ca98d5fb297391398486d4ebdde189d0fe72e4ab1806120556f5db67987a6d20
        • MD5 SHA1 SHA512

        memory/1400-73-0x0000000007480000-0x0000000007494000-memory.dmp

        memory/1400-66-0x0000000007110000-0x00000000071B3000-memory.dmp

        memory/1400-72-0x0000000007470000-0x000000000747E000-memory.dmp

        memory/1400-71-0x0000000007440000-0x0000000007451000-memory.dmp

        memory/1400-70-0x00000000074C0000-0x0000000007556000-memory.dmp

        memory/1400-15-0x00000000048F0000-0x0000000004926000-memory.dmp

        memory/1400-74-0x0000000007580000-0x000000000759A000-memory.dmp

        memory/1400-18-0x0000000004FB0000-0x00000000055D8000-memory.dmp

        memory/1400-17-0x0000000075180000-0x0000000075930000-memory.dmp

        memory/1400-19-0x0000000075180000-0x0000000075930000-memory.dmp

        memory/1400-69-0x00000000072B0000-0x00000000072BA000-memory.dmp

        memory/1400-67-0x0000000007880000-0x0000000007EFA000-memory.dmp

        memory/1400-68-0x0000000007240000-0x000000000725A000-memory.dmp

        memory/1400-55-0x0000000073C30000-0x0000000073C7C000-memory.dmp

        memory/1400-30-0x0000000005870000-0x0000000005BC4000-memory.dmp

        memory/1400-75-0x0000000007560000-0x0000000007568000-memory.dmp

        memory/1400-65-0x00000000064D0000-0x00000000064EE000-memory.dmp

        memory/1400-27-0x0000000075180000-0x0000000075930000-memory.dmp

        memory/1400-26-0x0000000005720000-0x0000000005786000-memory.dmp

        memory/1400-25-0x00000000056B0000-0x0000000005716000-memory.dmp

        memory/1400-23-0x0000000005610000-0x0000000005632000-memory.dmp

        memory/1400-78-0x0000000075180000-0x0000000075930000-memory.dmp

        memory/1400-54-0x00000000070D0000-0x0000000007102000-memory.dmp

        memory/1400-52-0x0000000005F00000-0x0000000005F1E000-memory.dmp

        memory/1400-53-0x0000000005F90000-0x0000000005FDC000-memory.dmp

        memory/2104-150-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-160-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-183-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-182-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-180-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-179-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-178-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-177-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-176-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-174-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-173-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-172-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-171-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-170-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-168-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-92-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-167-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-96-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-93-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-102-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-166-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-165-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-105-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-163-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-162-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-161-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-159-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-119-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-121-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-122-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-123-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-125-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-126-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-127-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-129-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-130-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-131-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-132-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-133-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-135-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-136-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-137-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-138-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-139-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-141-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-142-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-143-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-144-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-145-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-157-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-147-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-148-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-149-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-156-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-151-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-153-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-154-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2104-155-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/3580-20-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/3580-29-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/3580-50-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/3580-21-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/3580-22-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4264-118-0x0000000007D20000-0x0000000007D34000-memory.dmp

        memory/4264-117-0x0000000007CE0000-0x0000000007CF1000-memory.dmp

        memory/4264-116-0x0000000007A00000-0x0000000007AA3000-memory.dmp

        memory/4264-106-0x0000000072860000-0x00000000728AC000-memory.dmp

        memory/4264-104-0x00000000067F0000-0x000000000683C000-memory.dmp

        memory/4264-97-0x0000000006120000-0x0000000006474000-memory.dmp

        memory/4552-3-0x00000000053E0000-0x0000000005472000-memory.dmp

        memory/4552-4-0x0000000075180000-0x0000000075930000-memory.dmp

        memory/4552-6-0x0000000006A40000-0x0000000006A5E000-memory.dmp

        memory/4552-7-0x000000007518E000-0x000000007518F000-memory.dmp

        memory/4552-8-0x0000000075180000-0x0000000075930000-memory.dmp

        memory/4552-9-0x0000000009460000-0x0000000009520000-memory.dmp

        memory/4552-10-0x000000000B520000-0x000000000B5BC000-memory.dmp

        memory/4552-5-0x00000000054A0000-0x00000000054AA000-memory.dmp

        memory/4552-0-0x000000007518E000-0x000000007518F000-memory.dmp

        memory/4552-2-0x00000000058F0000-0x0000000005E94000-memory.dmp

        memory/4552-1-0x00000000008E0000-0x00000000009E4000-memory.dmp

        memory/4552-31-0x0000000075180000-0x0000000075930000-memory.dmp