Analysis

  • max time kernel
    148s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/04/2024, 01:02

General

  • Target
    49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe
  • Size 1.1MB
  • Sample240422-bdxenadc56
  • SHA256 49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • nessn.duckdns.org:1984

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

    nnws

  • mouse_option

    false

  • mutex

    Rmc-D1LYYC

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • Remcos

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

  • ModiLoader Second Stage 1 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 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 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Script User-Agent 2 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe
    "C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3476
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\GophjwfkO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1400
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
        3⤵
          PID:3568
        • C:\Windows\SysWOW64\xcopy.exe
          xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
          3⤵
          • Enumerates system info in registry
          PID:2556
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:1064
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "Aaa.bat" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:4040
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:800
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:5116
            • C:\Windows \System32\easinvoker.exe
              "C:\Windows \System32\easinvoker.exe"
              3⤵
              • Executes dropped EXE
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:4724
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\windows \system32\aaa.bat""
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:2688
                • C:\Windows\System32\extrac32.exe
                  C:\\Windows\\System32\\extrac32.exe /C /Y C:\\Windows\\System32\\cmd.exe C:\\Users\\Public\\alpha.exe
                  5⤵
                    PID:4800
                  • C:\Users\Public\alpha.exe
                    C:\\Users\\Public\\alpha /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                    5⤵
                    • Executes dropped EXE
                    • Suspicious use of WriteProcessMemory
                    PID:2492
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                      powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                      6⤵
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:864
            • C:\Windows\SysWOW64\extrac32.exe
              C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe C:\\Users\\Public\\Libraries\\Gophjwfk.PIF
              2⤵
                PID:2424
              • C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe
                C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe /stext "C:\Users\Admin\AppData\Local\Temp\zjchj"
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                PID:3832
              • C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe
                C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe /stext "C:\Users\Admin\AppData\Local\Temp\bdhajnco"
                2⤵
                • Accesses Microsoft Outlook accounts
                PID:2988
              • C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe
                C:\Users\Admin\AppData\Local\Temp\49a98a42ff6fff1b7dae074cb3c325ba9df2183dceb69feae6c0e7322ac94eb2.exe /stext "C:\Users\Admin\AppData\Local\Temp\lxukkxnqpzfk"
                2⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:4452

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  logs.dat

                  • Path C:\ProgramData\nnws\logs.dat
                  • Size 144B
                  • SHA256 8e0d5cc7b13e44e8802ed8449f64fe8c9f86980506332824ab73256b4fb217f4
                  • MD5 SHA1 SHA512

                  __PSScriptPolicyTest_04zi3dqo.kdy.ps1

                  • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_04zi3dqo.kdy.ps1
                  • Size 60B
                  • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                  • MD5 SHA1 SHA512

                  zjchj

                  • Path C:\Users\Admin\AppData\Local\Temp\zjchj
                  • Size 4KB
                  • SHA256 6c73d4e220894399c0a8b9e901e9e1183f86658e05e59118112418b53805f995
                  • MD5 SHA1 SHA512 SSDEEP

                  GophjwfkO.bat

                  • Path C:\Users\Public\Libraries\GophjwfkO.bat
                  • Size 29KB
                  • SHA256 abac4a967800f5da708572ec42441ec373cd52459a83a8a382d6b8579482789d
                  • MD5 SHA1 SHA512 SSDEEP

                  aaa.bat

                  • Path C:\Users\Public\Libraries\aaa.bat
                  • Size 3KB
                  • SHA256 11c20fabf677cd77e8a354b520f6ffca09cac37ce15c9932550e749e49efe08a
                  • MD5 SHA1 SHA512

                  easinvoker.exe

                  • Path C:\Users\Public\Libraries\easinvoker.exe
                  • Size 128KB
                  • SHA256 30951db8bfc21640645aa9144cfeaa294bb7c6980ef236d28552b6f4f3f92a96
                  • MD5 SHA1 SHA512 SSDEEP

                  netutils.dll

                  • Path C:\Users\Public\Libraries\netutils.dll
                  • Size 114KB
                  • SHA256 a692d4305b95e57e2cfc871d53a41a5bfc9e306cb1a86ca1159db4f469598714
                  • MD5 SHA1 SHA512 SSDEEP

                  alpha.exe

                  • Path C:\Users\Public\alpha.exe
                  • Size 283KB
                  • SHA256 b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450
                  • MD5 SHA1 SHA512 SSDEEP

                  memory/864-41-0x00007FFFF8A80000-0x00007FFFF9541000-memory.dmp

                  memory/864-45-0x00007FFFF8A80000-0x00007FFFF9541000-memory.dmp

                  memory/864-42-0x00000236EAF70000-0x00000236EAF80000-memory.dmp

                  memory/864-31-0x00000236EAFB0000-0x00000236EAFD2000-memory.dmp

                  memory/2988-72-0x0000000000400000-0x0000000000462000-memory.dmp

                  memory/2988-66-0x0000000000400000-0x0000000000462000-memory.dmp

                  memory/2988-76-0x0000000000400000-0x0000000000462000-memory.dmp

                  memory/2988-85-0x0000000000400000-0x0000000000462000-memory.dmp

                  memory/2988-81-0x0000000000470000-0x0000000000539000-memory.dmp

                  memory/2988-79-0x0000000000400000-0x0000000000462000-memory.dmp

                  memory/3476-98-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-126-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-57-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-58-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-59-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-60-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-61-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-63-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-1-0x0000000004020000-0x0000000005020000-memory.dmp

                  memory/3476-55-0x0000000000B40000-0x0000000000B41000-memory.dmp

                  memory/3476-104-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-0-0x0000000000B40000-0x0000000000B41000-memory.dmp

                  memory/3476-137-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-103-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-53-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-136-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-52-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-114-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-50-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-56-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-125-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3476-4-0x0000000000400000-0x000000000051F000-memory.dmp

                  memory/3476-99-0x0000000034880000-0x0000000034899000-memory.dmp

                  memory/3476-96-0x0000000034880000-0x0000000034899000-memory.dmp

                  memory/3476-95-0x0000000034880000-0x0000000034899000-memory.dmp

                  memory/3476-92-0x0000000034880000-0x0000000034899000-memory.dmp

                  memory/3476-97-0x0000000034880000-0x0000000034899000-memory.dmp

                  memory/3476-2-0x0000000004020000-0x0000000005020000-memory.dmp

                  memory/3476-115-0x00000000163E0000-0x00000000173E0000-memory.dmp

                  memory/3832-88-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/3832-73-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/3832-68-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/3832-65-0x0000000000400000-0x0000000000478000-memory.dmp

                  memory/4452-86-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/4452-82-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/4452-83-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/4452-80-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/4452-70-0x0000000000400000-0x0000000000424000-memory.dmp

                  memory/4724-24-0x00000000613C0000-0x00000000613E3000-memory.dmp