Analysis

  • max time kernel
    149s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240730-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/08/2024, 03:39

General

  • Target
    4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe
  • Size 986KB
  • Sample240802-d7neystgkn
  • SHA256 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • eadzagba1.duckdns.org:4877

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-3DF634

  • 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 3 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 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe
    "C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3744
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yTDUjUzWijyB.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3400
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yTDUjUzWijyB" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFC42.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1076
    • C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe
      "C:\Users\Admin\AppData\Local\Temp\4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5072
      • 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:2040
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\yTDUjUzWijyB.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3936
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\yTDUjUzWijyB" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3709.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1676
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          PID:4192
        • 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
          PID:4944

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        remcos.exe

        • Path C:\ProgramData\Remcos\remcos.exe
        • Size 986KB
        • SHA256 4a79a8b83afd4feb2fd2e130d54f667fa9ee6c61ecf7d61efed3753ab2450775
        • 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 36d74802da9468ca43d5e36fd92c9f845747f1cb20265e08edd69920dc2d0d42
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_0jepcjnt.bx3.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0jepcjnt.bx3.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        tmpFC42.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmpFC42.tmp
        • Size 1KB
        • SHA256 5b14fd83ed80c7c50ae3d7dfcca6c5f28473425c906f4d78777083b0ef7db952
        • MD5 SHA1 SHA512

        memory/3400-74-0x0000000007400000-0x0000000007408000-memory.dmp

        memory/3400-66-0x0000000007730000-0x0000000007DAA000-memory.dmp

        memory/3400-53-0x0000000006380000-0x00000000063B2000-memory.dmp

        memory/3400-73-0x0000000007420000-0x000000000743A000-memory.dmp

        memory/3400-72-0x0000000007320000-0x0000000007334000-memory.dmp

        memory/3400-21-0x0000000005640000-0x00000000056A6000-memory.dmp

        memory/3400-18-0x00000000752A0000-0x0000000075A50000-memory.dmp

        memory/3400-71-0x0000000007310000-0x000000000731E000-memory.dmp

        memory/3400-70-0x00000000072E0000-0x00000000072F1000-memory.dmp

        memory/3400-69-0x0000000007360000-0x00000000073F6000-memory.dmp

        memory/3400-68-0x0000000007150000-0x000000000715A000-memory.dmp

        memory/3400-15-0x00000000752A0000-0x0000000075A50000-memory.dmp

        memory/3400-67-0x00000000070E0000-0x00000000070FA000-memory.dmp

        memory/3400-77-0x00000000752A0000-0x0000000075A50000-memory.dmp

        memory/3400-27-0x00000000752A0000-0x0000000075A50000-memory.dmp

        memory/3400-65-0x0000000006FB0000-0x0000000007053000-memory.dmp

        memory/3400-16-0x0000000004FA0000-0x00000000055C8000-memory.dmp

        memory/3400-64-0x0000000006360000-0x000000000637E000-memory.dmp

        memory/3400-14-0x00000000024B0000-0x00000000024E6000-memory.dmp

        memory/3400-54-0x0000000075B30000-0x0000000075B7C000-memory.dmp

        memory/3400-28-0x00000000057B0000-0x0000000005B04000-memory.dmp

        memory/3400-51-0x0000000005DC0000-0x0000000005DDE000-memory.dmp

        memory/3400-20-0x00000000055D0000-0x0000000005636000-memory.dmp

        memory/3400-19-0x0000000004EF0000-0x0000000004F12000-memory.dmp

        memory/3400-52-0x00000000060B0000-0x00000000060FC000-memory.dmp

        memory/3744-4-0x0000000005700000-0x000000000570A000-memory.dmp

        memory/3744-5-0x00000000752A0000-0x0000000075A50000-memory.dmp

        memory/3744-0-0x00000000752AE000-0x00000000752AF000-memory.dmp

        memory/3744-1-0x0000000000B60000-0x0000000000C5C000-memory.dmp

        memory/3744-2-0x0000000005B70000-0x0000000006114000-memory.dmp

        memory/3744-3-0x0000000005660000-0x00000000056F2000-memory.dmp

        memory/3744-9-0x0000000008E70000-0x0000000008F0C000-memory.dmp

        memory/3744-8-0x0000000008CB0000-0x0000000008D72000-memory.dmp

        memory/3744-7-0x00000000059A0000-0x00000000059AE000-memory.dmp

        memory/3744-6-0x0000000005850000-0x0000000005866000-memory.dmp

        memory/3744-29-0x00000000752A0000-0x0000000075A50000-memory.dmp

        memory/3936-111-0x00000000079A0000-0x00000000079B1000-memory.dmp

        memory/3936-110-0x0000000007670000-0x0000000007713000-memory.dmp

        memory/3936-100-0x0000000071A90000-0x0000000071ADC000-memory.dmp

        memory/3936-99-0x0000000006510000-0x000000000655C000-memory.dmp

        memory/3936-81-0x0000000005DF0000-0x0000000006144000-memory.dmp

        memory/4944-113-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-138-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-91-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-98-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-169-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-168-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-167-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-166-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-165-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-114-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-115-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-116-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-117-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-118-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-119-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-120-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-121-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-122-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-123-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-124-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-125-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-126-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-127-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-128-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-129-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-130-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-131-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-132-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-133-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-134-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-135-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-136-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-137-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-85-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-139-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-140-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-141-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-142-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-143-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-144-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-145-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-146-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-147-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-148-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-149-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-150-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-151-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-152-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-153-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-154-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-155-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-156-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-157-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-158-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-159-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-160-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-161-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-162-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-163-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/4944-164-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/5072-24-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/5072-23-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/5072-22-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/5072-35-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/5072-50-0x0000000000400000-0x0000000000482000-memory.dmp