Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/11/2024, 15:18

General

  • Target
    7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe
  • Size 925KB
  • Sample241105-spk97sspgv
  • SHA256 7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 206.189.218.238:4782

  • 206.189.218.238:2286

  • 206.189.218.238:3363

  • 206.189.218.238:3386

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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-NJK093

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Remcos family
  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • 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 7 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 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 19 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 60 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe
    "C:\Users\Admin\AppData\Local\Temp\7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4424
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HOfyiGfs.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2888
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HOfyiGfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp17C9.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3528
    • C:\Users\Admin\AppData\Local\Temp\7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe
      "C:\Users\Admin\AppData\Local\Temp\7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe"
      2⤵
        PID:4644
      • C:\Users\Admin\AppData\Local\Temp\7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe
        "C:\Users\Admin\AppData\Local\Temp\7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf.exe"
        2⤵
        • Checks computer location settings
        • Adds Run key to start application
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3280
        • 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:1088
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HOfyiGfs.exe"
            4⤵
            • Command and Scripting Interpreter: PowerShell
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4312
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HOfyiGfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7896.tmp"
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4748
          • C:\ProgramData\Remcos\remcos.exe
            "C:\ProgramData\Remcos\remcos.exe"
            4⤵
            • Executes dropped EXE
            PID:4304
          • C:\ProgramData\Remcos\remcos.exe
            "C:\ProgramData\Remcos\remcos.exe"
            4⤵
            • 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 SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:3284
            • C:\ProgramData\Remcos\remcos.exe
              C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dnoeqgf"
              5⤵
              • Executes dropped EXE
              PID:4752
            • C:\ProgramData\Remcos\remcos.exe
              C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dnoeqgf"
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              PID:4472
            • C:\ProgramData\Remcos\remcos.exe
              C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\nhtwqzqczg"
              5⤵
              • Executes dropped EXE
              • Accesses Microsoft Outlook accounts
              • System Location Discovery: System Language Discovery
              PID:3908
            • C:\ProgramData\Remcos\remcos.exe
              C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\xkypjravnoduu"
              5⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:1644

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          logs.dat

          • Path C:\ProgramData\Remcos\logs.dat
          • Size 144B
          • SHA256 3a3c07189ab6e4c953bba9a9a92ad8aed4fb4410118cd88b4c7d1bf72eff0f1f
          • MD5 SHA1 SHA512

          remcos.exe

          • Path C:\ProgramData\Remcos\remcos.exe
          • Size 925KB
          • SHA256 7fef9fc48835f5ad1c726a78a1feac7e7f9049267155bb452a476af6d2694fbf
          • 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 0078636b61dcd147e12486d6af534be22f3833bc34be76e1c778f491cb3ec7da
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_ljx4txoi.ecc.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ljx4txoi.ecc.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          dnoeqgf

          • Path C:\Users\Admin\AppData\Local\Temp\dnoeqgf
          • Size 4KB
          • SHA256 7cc0db44c7b23e4894fe11f0d8d84b2a82ad667eb1e3504192f3ba729f9a7903
          • MD5 SHA1 SHA512 SSDEEP

          tmp17C9.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp17C9.tmp
          • Size 1KB
          • SHA256 1b6bb6d4508f497cb308ce5463f8e35bc6f3c269ac78c14d90e88fd04399635f
          • MD5 SHA1 SHA512

          memory/1644-133-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1644-136-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1644-137-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/2888-74-0x0000000007360000-0x000000000737A000-memory.dmp

          memory/2888-55-0x000000006F960000-0x000000006F9AC000-memory.dmp

          memory/2888-16-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/2888-15-0x00000000023F0000-0x0000000002426000-memory.dmp

          memory/2888-17-0x00000000050B0000-0x00000000056D8000-memory.dmp

          memory/2888-20-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/2888-21-0x0000000004ED0000-0x0000000004F36000-memory.dmp

          memory/2888-22-0x0000000005040000-0x00000000050A6000-memory.dmp

          memory/2888-71-0x0000000007220000-0x0000000007231000-memory.dmp

          memory/2888-70-0x00000000072A0000-0x0000000007336000-memory.dmp

          memory/2888-69-0x0000000007090000-0x000000000709A000-memory.dmp

          memory/2888-39-0x0000000005710000-0x0000000005A64000-memory.dmp

          memory/2888-78-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/2888-75-0x0000000007340000-0x0000000007348000-memory.dmp

          memory/2888-68-0x0000000007020000-0x000000000703A000-memory.dmp

          memory/2888-51-0x0000000005CD0000-0x0000000005CEE000-memory.dmp

          memory/2888-73-0x0000000007260000-0x0000000007274000-memory.dmp

          memory/2888-53-0x0000000006270000-0x00000000062BC000-memory.dmp

          memory/2888-67-0x0000000007680000-0x0000000007CFA000-memory.dmp

          memory/2888-23-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/2888-19-0x0000000004E30000-0x0000000004E52000-memory.dmp

          memory/2888-54-0x0000000006D10000-0x0000000006D42000-memory.dmp

          memory/2888-72-0x0000000007250000-0x000000000725E000-memory.dmp

          memory/2888-65-0x00000000062C0000-0x00000000062DE000-memory.dmp

          memory/2888-66-0x0000000006F50000-0x0000000006FF3000-memory.dmp

          memory/3280-30-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3280-50-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3280-37-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3280-36-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3280-24-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-90-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-125-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-175-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-174-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-167-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-166-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-91-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-158-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-157-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-86-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-152-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-84-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-151-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3284-150-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3284-147-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3284-126-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-120-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-119-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-121-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-122-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3284-124-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3908-135-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/3908-131-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/3908-138-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/4312-117-0x0000000007810000-0x0000000007824000-memory.dmp

          memory/4312-93-0x0000000005C10000-0x0000000005F64000-memory.dmp

          memory/4312-105-0x00000000067B0000-0x00000000067FC000-memory.dmp

          memory/4312-106-0x0000000075750000-0x000000007579C000-memory.dmp

          memory/4312-116-0x00000000077C0000-0x00000000077D1000-memory.dmp

          memory/4424-6-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/4424-52-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/4424-3-0x0000000005250000-0x00000000052E2000-memory.dmp

          memory/4424-2-0x0000000005720000-0x0000000005CC4000-memory.dmp

          memory/4424-5-0x0000000005510000-0x00000000055AC000-memory.dmp

          memory/4424-0-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

          memory/4424-8-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

          memory/4424-4-0x0000000005240000-0x000000000524A000-memory.dmp

          memory/4424-1-0x0000000000890000-0x000000000097E000-memory.dmp

          memory/4424-9-0x0000000074EC0000-0x0000000075670000-memory.dmp

          memory/4424-10-0x00000000092F0000-0x00000000093B0000-memory.dmp

          memory/4424-7-0x00000000055D0000-0x00000000055EE000-memory.dmp

          memory/4472-129-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4472-140-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4472-139-0x0000000000400000-0x0000000000478000-memory.dmp