Analysis

  • max time kernel
    121s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    26/03/2024, 01:30

General

  • Target

    6efee44acf580c370d19926398438acb40a8c63120bad4e2502d8a847e011239.exe

  • Size

    1.7MB

  • MD5

    1cf1c8a6b74890f6d1913bf3b9e46a79

  • SHA1

    3baa803148359d5ecd3afac11352e8ecab90ceee

  • SHA256

    6efee44acf580c370d19926398438acb40a8c63120bad4e2502d8a847e011239

  • SHA512

    6903889c69d4b6c13c768592abff2aa20b3f8c689381d4814f27c4647023bcfdbd20e99d98913e1d8ec19751d2eb1dbc5a8ca3e0a48be3acdcbd9a644ea5cc70

  • SSDEEP

    24576:J2G/nvxW3WAAJElP9nCWgiFzoJNkvnw28BAc1eThSQFdO5q+4OvqLqzvXrJhtZ:JbA3Qa4h527ceSQFdOo+HqLqHfP

Score
10/10

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 27 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • DCRat payload 4 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 27 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\6efee44acf580c370d19926398438acb40a8c63120bad4e2502d8a847e011239.exe
    "C:\Users\Admin\AppData\Local\Temp\6efee44acf580c370d19926398438acb40a8c63120bad4e2502d8a847e011239.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2440
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\BlockSurrogateagentFont\fQyg6J4g9nmbhwQ5lS61NpcW4.vbe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2992
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\BlockSurrogateagentFont\xRLfwMVgfRAMuw596iKz87.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2576
        • C:\BlockSurrogateagentFont\hostnet.exe
          "C:\BlockSurrogateagentFont\hostnet.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2560
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\NXbjsV5dMk.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2932
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:896
              • C:\BlockSurrogateagentFont\cmd.exe
                "C:\BlockSurrogateagentFont\cmd.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1456
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\Videos\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2392
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Admin\Videos\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2484
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Videos\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2636
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1028
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 10 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1428
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Program Files\Microsoft Games\FreeCell\de-DE\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:844
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files\Microsoft Games\FreeCell\de-DE\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1272
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Program Files\Microsoft Games\FreeCell\de-DE\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1632
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\Microsoft\NetFramework\BreadcrumbStore\dwm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2428
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\All Users\Microsoft\NetFramework\BreadcrumbStore\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2664
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Users\All Users\Microsoft\NetFramework\BreadcrumbStore\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 10 /tr "'C:\BlockSurrogateagentFont\cmd.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2988
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\BlockSurrogateagentFont\cmd.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 9 /tr "'C:\BlockSurrogateagentFont\cmd.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2336
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:940
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1928
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:540
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 14 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\cmd.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:804
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\cmd.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2152
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 13 /tr "'C:\Recovery\8f9e55a2-d10b-11ee-8d36-fdfbfcab7b96\cmd.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2332
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Windows\PLA\Templates\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1244
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\PLA\Templates\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1356
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Windows\PLA\Templates\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1704
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\Templates\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2012
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Admin\Templates\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1208
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\Templates\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2720

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\BlockSurrogateagentFont\fQyg6J4g9nmbhwQ5lS61NpcW4.vbe

            Filesize

            223B

            MD5

            277c7ccc3313d83f51d594cba0ae300d

            SHA1

            48531a959a24846841b8fda471c5fea259f2ca38

            SHA256

            175078a008fd8a809b77f11c51933d1a9e5181282523819875e7afea24c52b96

            SHA512

            311e654150ad8bf4bf9b38a7b876f205cf5a450be4b6a9ced8a7e3e15ca1137a4f1dbfac0dce058031a616b4621ec592592db17e10f1753f739f710b1f54c5ac

          • C:\BlockSurrogateagentFont\xRLfwMVgfRAMuw596iKz87.bat

            Filesize

            40B

            MD5

            15611ce0ff6e3e772e3a8b7ac6cf4653

            SHA1

            75bc873877b06c9413cc8d1908106ed143cd4bf0

            SHA256

            630c1433757569b9e123313255a23d50e82a629396121ff21df67a56ebf92ae3

            SHA512

            1151ee66357bdb4946f534cfe5a509497ccc57668fb874d17977740db6a6796fbdd6893e3196c3dab0be44f9f1b4f1c0f8870593a960a384f978bd5a1813fe71

          • C:\Users\Admin\AppData\Local\Temp\NXbjsV5dMk.bat

            Filesize

            199B

            MD5

            4ddf41f54a28bbab15b116a41ba10aa3

            SHA1

            a372c0af8639fe3dd969f00eaf309ed191736a44

            SHA256

            7240a04aa44c6e80a13e74b71022faac563b073e64a82a50bfd44ba6b862013f

            SHA512

            af48c461fccd74822ad659fb1df9e1aaee3ea56abdd5eee909c5b143d05b8203c98a4c736af09c8497db073d42d5e03fca4cf23b9b5dff1c48743bfb474326f3

          • \BlockSurrogateagentFont\hostnet.exe

            Filesize

            1.5MB

            MD5

            53827648303c620a8fa81a2998ae5ae5

            SHA1

            8aa7c650f061e7d7f396718e6b4d8934392b60bb

            SHA256

            b1f886a9cc761bbe9e6bb5287d414d3ba0e1402c6d1c055435985e3bcacbf652

            SHA512

            273bb61dbde98abc172e9afe83f25e1d2b93d0dcb9a5dd8ebef03f70c677499c4d3c1788a9fa9e71131847ba1a2e6d4ffcdac20c3496b472377756f112d1550d

          • memory/1456-53-0x000007FEF5080000-0x000007FEF5A6C000-memory.dmp

            Filesize

            9.9MB

          • memory/1456-52-0x000000001B050000-0x000000001B0D0000-memory.dmp

            Filesize

            512KB

          • memory/1456-51-0x0000000000E30000-0x0000000000FB2000-memory.dmp

            Filesize

            1.5MB

          • memory/1456-50-0x000007FEF5080000-0x000007FEF5A6C000-memory.dmp

            Filesize

            9.9MB

          • memory/2560-19-0x0000000000710000-0x0000000000726000-memory.dmp

            Filesize

            88KB

          • memory/2560-20-0x0000000000500000-0x0000000000510000-memory.dmp

            Filesize

            64KB

          • memory/2560-21-0x0000000000730000-0x0000000000742000-memory.dmp

            Filesize

            72KB

          • memory/2560-22-0x0000000000760000-0x000000000076E000-memory.dmp

            Filesize

            56KB

          • memory/2560-23-0x0000000000AA0000-0x0000000000AAC000-memory.dmp

            Filesize

            48KB

          • memory/2560-18-0x00000000004E0000-0x00000000004FC000-memory.dmp

            Filesize

            112KB

          • memory/2560-47-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

            Filesize

            9.9MB

          • memory/2560-17-0x00000000004D0000-0x00000000004DE000-memory.dmp

            Filesize

            56KB

          • memory/2560-16-0x000000001B020000-0x000000001B0A0000-memory.dmp

            Filesize

            512KB

          • memory/2560-15-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

            Filesize

            9.9MB

          • memory/2560-14-0x0000000000B90000-0x0000000000D12000-memory.dmp

            Filesize

            1.5MB