Analysis

  • max time kernel
    143s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/02/2024, 15:30

General

  • Target
    Purchase_Order.exe
  • Size 1.3MB
  • Sample240220-sxvtlsaf3x
  • SHA256 cae69da5307192f70fc72f4e3b59a75374ee094378c1fdc3b6eadfed2185f441
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • bonaven.duckdns.org:1970

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

    bonas

  • mouse_option

    false

  • mutex

    Rmc-D4INVW

  • 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 6 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase_Order.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase_Order.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:2604
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Public\Libraries\NzwlomnwO.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1812
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c mkdir "\\?\C:\Windows "
        3⤵
          PID:2192
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
          3⤵
            PID:4924
          • C:\Windows\SysWOW64\xcopy.exe
            xcopy "easinvoker.exe" "C:\Windows \System32\" /K /D /H /Y
            3⤵
            • Enumerates system info in registry
            PID:3568
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
            3⤵
              PID:912
            • C:\Windows\SysWOW64\xcopy.exe
              xcopy "netutils.dll" "C:\Windows \System32\" /K /D /H /Y
              3⤵
              • Enumerates system info in registry
              PID:3604
            • C:\Windows\SysWOW64\cmd.exe
              C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
              3⤵
                PID:2300
              • C:\Windows\SysWOW64\xcopy.exe
                xcopy "KDECO.bat" "C:\Windows \System32\" /K /D /H /Y
                3⤵
                • Enumerates system info in registry
                PID:5072
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /S /D /c" ECHO F"
                3⤵
                  PID:4592
                • C:\Windows\SysWOW64\xcopy.exe
                  xcopy "x.bat" "C:\Windows \System32\" /K /D /H /Y
                  3⤵
                  • Enumerates system info in registry
                  PID:4460
                • 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:2036
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\windows \system32\KDECO.bat""
                    4⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3636
                    • 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:4052
                      • 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:2508
                    • C:\Windows\system32\sc.exe
                      sc.exe create truesight binPath="C:\Users\Public\Libraries\truesight.sys" type=kernel
                      5⤵
                      • Launches sc.exe
                      PID:656
                    • C:\Windows\system32\sc.exe
                      sc.exe start truesight
                      5⤵
                      • Launches sc.exe
                      PID:2364
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c "C:\\Windows \\System32\\easinvoker.exe"
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:2728
                • C:\Windows \System32\easinvoker.exe
                  "C:\\Windows \\System32\\easinvoker.exe"
                  3⤵
                  • Executes dropped EXE
                  • Loads dropped DLL
                  PID:2576
              • C:\Windows\SysWOW64\colorcpl.exe
                C:\Windows\System32\colorcpl.exe
                2⤵
                • Suspicious use of SetThreadContext
                • Suspicious behavior: MapViewOfSection
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:716
                • C:\Windows\SysWOW64\colorcpl.exe
                  C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\tqkelzhznd"
                  3⤵
                    PID:4408
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\esqxmssablllc"
                    3⤵
                    • Accesses Microsoft Outlook accounts
                    PID:1616
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\gmvqnkcuptdqmrbh"
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2584
                  • C:\Windows\SysWOW64\colorcpl.exe
                    C:\Windows\SysWOW64\colorcpl.exe /stext "C:\Users\Admin\AppData\Local\Temp\esqxmssablllc"
                    3⤵
                      PID:968
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 716 -s 828
                      3⤵
                      • Program crash
                      PID:4988
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 716 -ip 716
                  1⤵
                    PID:1984

                  Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        logs.dat

                        • Path C:\ProgramData\bonas\logs.dat
                        • Size 144B
                        • SHA256 2ff50ef86890df944ce0020cc30fbc12b88beb30922a06496281c71e589721e4
                        • MD5 SHA1 SHA512

                        __PSScriptPolicyTest_m2u1b0md.4hl.ps1

                        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m2u1b0md.4hl.ps1
                        • Size 60B
                        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                        • MD5 SHA1 SHA512

                        tqkelzhznd

                        • Path C:\Users\Admin\AppData\Local\Temp\tqkelzhznd
                        • Size 4KB
                        • SHA256 e09a0aed9bbc43da3b7a85d30a9a10b54d11c096aa6cef81c23364bc9c4dfcc9
                        • MD5 SHA1 SHA512 SSDEEP

                        KDECO.bat

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

                        NzwlomnwO.bat

                        • Path C:\Users\Public\Libraries\NzwlomnwO.bat
                        • Size 7KB
                        • SHA256 f46e0cc2c119a32dd87edf97bfc73d985ee97d2c9dc00274b6b20d641e29deea
                        • 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 115KB
                        • SHA256 ae33f291a6f2011ca147c2b48035743aba3c507dcef86e1fa6acb4dee47cbf43
                        • MD5 SHA1 SHA512 SSDEEP

                        memory/716-56-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-58-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-67-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-106-0x0000000019180000-0x0000000019199000-memory.dmp

                        memory/716-66-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-63-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-61-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-59-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-103-0x0000000019180000-0x0000000019199000-memory.dmp

                        memory/716-75-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-74-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-51-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-54-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-55-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-107-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/716-57-0x0000000001200000-0x0000000002200000-memory.dmp

                        memory/1616-82-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/1616-88-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/1616-91-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/1616-95-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/1616-99-0x0000000000400000-0x0000000000457000-memory.dmp

                        memory/2036-27-0x00000000613C0000-0x00000000613E3000-memory.dmp

                        memory/2508-39-0x0000027DACA30000-0x0000027DACA40000-memory.dmp

                        memory/2508-40-0x0000027DACA30000-0x0000027DACA40000-memory.dmp

                        memory/2508-44-0x00007FFE33CF0000-0x00007FFE347B1000-memory.dmp

                        memory/2508-33-0x0000027D943E0000-0x0000027D94402000-memory.dmp

                        memory/2508-41-0x0000027DACA30000-0x0000027DACA40000-memory.dmp

                        memory/2508-38-0x00007FFE33CF0000-0x00007FFE347B1000-memory.dmp

                        memory/2576-49-0x00000000613C0000-0x00000000613E3000-memory.dmp

                        memory/2584-98-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2584-86-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2584-96-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2584-97-0x0000000000400000-0x0000000000424000-memory.dmp

                        memory/2604-0-0x0000000002310000-0x0000000002311000-memory.dmp

                        memory/2604-5-0x00000000736B0000-0x00000000736C2000-memory.dmp

                        memory/2604-4-0x0000000000400000-0x0000000000558000-memory.dmp

                        memory/2604-2-0x00000000049E0000-0x00000000059E0000-memory.dmp

                        memory/2604-1-0x00000000049E0000-0x00000000059E0000-memory.dmp

                        memory/4408-89-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/4408-85-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/4408-81-0x0000000000400000-0x0000000000478000-memory.dmp

                        memory/4408-101-0x0000000000400000-0x0000000000478000-memory.dmp