Analysis

  • max time kernel
    92s
  • max time network
    94s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    11/06/2024, 17:31

General

  • Target
    New/dggw.exe
  • Size 570KB
  • Sample240611-v35bcavdmb
  • SHA256 cfcdfdff42246ab34c0f8a8ca746dc47ddb3cb757a23dd0a4c1fda5cdbc67cd8
  • MD5 SHA1 SHA512 SSDEEP
Score
8/10

Malware Config

Signatures

  • Stops running service(s) 4 TTPs
  • Executes dropped EXE 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Windows directory 15 IoCs
  • Launches sc.exe 2 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Modifies data under HKEY_USERS 46 IoCs
  • Runs ping.exe 1 TTPs 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 54 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\New\dggw.exe
    "C:\Users\Admin\AppData\Local\Temp\New\dggw.exe"
    1⤵
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Windows\Fonts\systcm32\d.bat" "
      2⤵
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:4068
      • C:\Windows\SysWOW64\sc.exe
        sc stop SysMaln
        3⤵
        • Launches sc.exe
        PID:4008
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /f /im powershell.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:2500
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1
        3⤵
        • Runs ping.exe
        PID:2732
      • C:\Windows\Fonts\systcm32\csrss.exe
        C:\Windows\Fonts\systcm32\csrss.exe SysMaln C:\Windows\Fonts\systcm32\svchost.exe
        3⤵
        • Executes dropped EXE
        PID:1868
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1
        3⤵
        • Runs ping.exe
        PID:3456
      • C:\Windows\SysWOW64\reg.exe
        reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMaln /v Description /d "Maintains and improves system performance over time" /t reg_sz /f
        3⤵
          PID:1248
        • C:\Windows\SysWOW64\reg.exe
          reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMaln /v DisplayName /d "SysMaln" /t reg_sz /f
          3⤵
            PID:2052
          • C:\Windows\SysWOW64\reg.exe
            reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMaln\Parameters
            3⤵
              PID:2788
            • C:\Windows\SysWOW64\reg.exe
              reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMaln\Parameters /v AppDirectory /d "C:\Windows\Fonts\systcm32" /t reg_sz /f
              3⤵
                PID:688
              • C:\Windows\SysWOW64\reg.exe
                reg add HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMaln\Parameters /v Application /d ""C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "C:\Windows\Fonts\systcm32\p.ps1"" /t reg_sz /f
                3⤵
                  PID:796
                • C:\Windows\SysWOW64\PING.EXE
                  ping 127.0.0.1
                  3⤵
                  • Runs ping.exe
                  PID:3544
                • C:\Windows\SysWOW64\sc.exe
                  sc start SysMaln
                  3⤵
                  • Launches sc.exe
                  PID:1884
                • C:\Windows\SysWOW64\PING.EXE
                  ping 127.0.0.1
                  3⤵
                  • Runs ping.exe
                  PID:1952
                • C:\Windows\SysWOW64\regini.exe
                  regini 1.ini
                  3⤵
                    PID:1480
                • C:\Windows\SysWOW64\cmd.exe
                  "C:\Windows\system32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\HZ~5C39.tmp.bat"
                  2⤵
                  • Suspicious use of WriteProcessMemory
                  PID:4792
                  • C:\Windows\SysWOW64\PING.EXE
                    ping 127.0.0.1 -n 2
                    3⤵
                    • Runs ping.exe
                    PID:4544
              • C:\Windows\Fonts\systcm32\svchost.exe
                C:\Windows\Fonts\systcm32\svchost.exe
                1⤵
                • Executes dropped EXE
                • Suspicious use of WriteProcessMemory
                PID:4988
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe C:\Windows\Fonts\systcm32\p.ps1
                  2⤵
                  • Drops file in System32 directory
                  • Modifies data under HKEY_USERS
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1036

              Network

                    MITRE ATT&CK Enterprise v15

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                    Downloads

                    HZ~5C39.tmp.bat

                    • Path C:\Users\Admin\AppData\Local\Temp\HZ~5C39.tmp.bat
                    • Size 154B
                    • SHA256 a6c8dc3a38b01a8cd1d17a3d5c8217313a119134b0a7b0d328c94f0fbcdb2dec
                    • MD5 SHA1 SHA512

                    1.ini

                    • Path C:\Windows\Fonts\systcm32\1.ini
                    • Size 68B
                    • SHA256 6b012598ae7d5e1704001d0cbf3d88605a38cb440f600fee58f685ab8de6803d
                    • MD5 SHA1 SHA512

                    csrss.exe

                    • Path C:\Windows\Fonts\systcm32\csrss.exe
                    • Size 18KB
                    • SHA256 bbf4c224f9861b2c1f5a1364ee71e38728495b2709621763053b979ba88522f1
                    • MD5 SHA1 SHA512 SSDEEP

                    d.bat

                    • Path C:\Windows\Fonts\systcm32\d.bat
                    • Size 1KB
                    • SHA256 acb3afbecef952522194d0559e5c8591a7cc431d74e6b4c62d326b6b91b3b6b4
                    • MD5 SHA1 SHA512

                    p.ps1

                    • Path C:\Windows\Fonts\systcm32\p.ps1
                    • Size 17KB
                    • SHA256 13aba0939793c189c2f40dd30a4da5d0b36b18c4545edd735a6d9e3d275b8d41
                    • MD5 SHA1 SHA512 SSDEEP

                    svchost.exe

                    • Path C:\Windows\Fonts\systcm32\svchost.exe
                    • Size 8KB
                    • SHA256 abd4afd71b3c2bd3f741bbe3cec52c4fa63ac78d353101d2e7dc4de2725d1ca1
                    • MD5 SHA1 SHA512 SSDEEP

                    __PSScriptPolicyTest_00yqmglx.iv5.ps1

                    • Path C:\Windows\Temp\__PSScriptPolicyTest_00yqmglx.iv5.ps1
                    • Size 60B
                    • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                    • MD5 SHA1 SHA512

                    memory/1036-28-0x0000000004350000-0x00000000043B6000-memory.dmp

                    memory/1036-27-0x0000000003A40000-0x0000000003A62000-memory.dmp

                    memory/1036-29-0x00000000043C0000-0x0000000004426000-memory.dmp

                    memory/1036-26-0x0000000003C20000-0x000000000424A000-memory.dmp

                    memory/1036-38-0x00000000044C0000-0x0000000004817000-memory.dmp

                    memory/1036-39-0x00000000048D0000-0x00000000048EE000-memory.dmp

                    memory/1036-40-0x0000000004910000-0x000000000495C000-memory.dmp

                    memory/1036-25-0x0000000001100000-0x0000000001136000-memory.dmp

                    memory/1868-22-0x0000000000400000-0x000000000040A000-memory.dmp