Analysis

  • max time kernel
    137s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/03/2024, 13:38

General

  • Target

    1cf1c8a6b74890f6d1913bf3b9e46a79.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 30 IoCs

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

  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 30 IoCs

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

  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 14 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\1cf1c8a6b74890f6d1913bf3b9e46a79.exe
    "C:\Users\Admin\AppData\Local\Temp\1cf1c8a6b74890f6d1913bf3b9e46a79.exe"
    1⤵
    • Checks computer location settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1080
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\BlockSurrogateagentFont\fQyg6J4g9nmbhwQ5lS61NpcW4.vbe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:3764
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\BlockSurrogateagentFont\xRLfwMVgfRAMuw596iKz87.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:5588
        • C:\BlockSurrogateagentFont\hostnet.exe
          "C:\BlockSurrogateagentFont\hostnet.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3376
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\pki5XcHhHF.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:3944
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:4780
              • C:\Recovery\WindowsRE\WaaSMedicAgent.exe
                "C:\Recovery\WindowsRE\WaaSMedicAgent.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:6096
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 5 /tr "'C:\Program Files\Internet Explorer\en-US\unsecapp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4640
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Program Files\Internet Explorer\en-US\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5776
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 5 /tr "'C:\Program Files\Internet Explorer\en-US\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5780
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\services.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5504
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5072
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2328
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 10 /tr "'C:\Program Files\Java\jre-1.8\bin\plugin2\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5612
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\Java\jre-1.8\bin\plugin2\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3780
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\Program Files\Java\jre-1.8\bin\plugin2\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1400
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 12 /tr "'C:\Windows\Cursors\SearchApp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2868
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\Cursors\SearchApp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2304
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SearchAppS" /sc MINUTE /mo 6 /tr "'C:\Windows\Cursors\SearchApp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5524
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\odt\OfficeClickToRun.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5576
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\odt\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5564
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRunO" /sc MINUTE /mo 12 /tr "'C:\odt\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:6136
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 10 /tr "'C:\Users\Default User\TextInputHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:996
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Users\Default User\TextInputHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\TextInputHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5748
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Common Files\System\en-US\backgroundTaskHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3940
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\System\en-US\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:3956
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHostb" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Common Files\System\en-US\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5876
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2864
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5880
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\sihost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2012
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 13 /tr "'C:\odt\Registry.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4584
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\odt\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:2352
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 12 /tr "'C:\odt\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4516
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WaaSMedicAgentW" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\WaaSMedicAgent.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:1404
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WaaSMedicAgent" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\WaaSMedicAgent.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:4896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WaaSMedicAgentW" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\WaaSMedicAgent.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Creates scheduled task(s)
      PID:5656
    • C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.VCLibs.140.00_8wekyb3d8bbwe
      1⤵
        PID:2056
      • C:\Windows\System32\svchost.exe
        C:\Windows\System32\svchost.exe -k UnistackSvcGroup
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3944

      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\hostnet.exe

              Filesize

              1.5MB

              MD5

              53827648303c620a8fa81a2998ae5ae5

              SHA1

              8aa7c650f061e7d7f396718e6b4d8934392b60bb

              SHA256

              b1f886a9cc761bbe9e6bb5287d414d3ba0e1402c6d1c055435985e3bcacbf652

              SHA512

              273bb61dbde98abc172e9afe83f25e1d2b93d0dcb9a5dd8ebef03f70c677499c4d3c1788a9fa9e71131847ba1a2e6d4ffcdac20c3496b472377756f112d1550d

            • C:\BlockSurrogateagentFont\xRLfwMVgfRAMuw596iKz87.bat

              Filesize

              40B

              MD5

              15611ce0ff6e3e772e3a8b7ac6cf4653

              SHA1

              75bc873877b06c9413cc8d1908106ed143cd4bf0

              SHA256

              630c1433757569b9e123313255a23d50e82a629396121ff21df67a56ebf92ae3

              SHA512

              1151ee66357bdb4946f534cfe5a509497ccc57668fb874d17977740db6a6796fbdd6893e3196c3dab0be44f9f1b4f1c0f8870593a960a384f978bd5a1813fe71

            • C:\Users\Admin\AppData\Local\Temp\pki5XcHhHF.bat

              Filesize

              205B

              MD5

              d9beaa7b00a98853c9096c9a81dd024c

              SHA1

              3137a1d447b5ca3b5b1ed5387eff84825742610d

              SHA256

              b6f184ee1e95c1ffcf7b80b42a8b1e2db1f47272f6d8279777b4a41e7ca9e544

              SHA512

              8ce8edf7bfc8e66ee9534e68d2ff540de092805bb59c615529e548e0aa84494c88b2a73677a3421d835e6856496991a6066e4082c71909739eef57a0b6638106

            • memory/3376-21-0x000000001C0B0000-0x000000001C5D8000-memory.dmp

              Filesize

              5.2MB

            • memory/3376-49-0x00007FFCBBB90000-0x00007FFCBC651000-memory.dmp

              Filesize

              10.8MB

            • memory/3376-15-0x00000000027F0000-0x00000000027FE000-memory.dmp

              Filesize

              56KB

            • memory/3376-16-0x000000001B240000-0x000000001B25C000-memory.dmp

              Filesize

              112KB

            • memory/3376-17-0x000000001B2B0000-0x000000001B300000-memory.dmp

              Filesize

              320KB

            • memory/3376-18-0x000000001B260000-0x000000001B276000-memory.dmp

              Filesize

              88KB

            • memory/3376-19-0x0000000002800000-0x0000000002810000-memory.dmp

              Filesize

              64KB

            • memory/3376-20-0x000000001B280000-0x000000001B292000-memory.dmp

              Filesize

              72KB

            • memory/3376-13-0x00007FFCBBB90000-0x00007FFCBC651000-memory.dmp

              Filesize

              10.8MB

            • memory/3376-22-0x000000001B300000-0x000000001B30E000-memory.dmp

              Filesize

              56KB

            • memory/3376-23-0x000000001B310000-0x000000001B31C000-memory.dmp

              Filesize

              48KB

            • memory/3376-14-0x000000001B330000-0x000000001B340000-memory.dmp

              Filesize

              64KB

            • memory/3376-12-0x00000000005A0000-0x0000000000722000-memory.dmp

              Filesize

              1.5MB

            • memory/3944-58-0x0000014789840000-0x0000014789850000-memory.dmp

              Filesize

              64KB

            • memory/3944-74-0x0000014789940000-0x0000014789950000-memory.dmp

              Filesize

              64KB

            • memory/3944-90-0x0000014791C70000-0x0000014791C71000-memory.dmp

              Filesize

              4KB

            • memory/3944-92-0x0000014791CA0000-0x0000014791CA1000-memory.dmp

              Filesize

              4KB

            • memory/3944-93-0x0000014791CA0000-0x0000014791CA1000-memory.dmp

              Filesize

              4KB

            • memory/3944-94-0x0000014791DB0000-0x0000014791DB1000-memory.dmp

              Filesize

              4KB

            • memory/6096-54-0x00007FFCBBB90000-0x00007FFCBC651000-memory.dmp

              Filesize

              10.8MB

            • memory/6096-55-0x000000001B100000-0x000000001B110000-memory.dmp

              Filesize

              64KB

            • memory/6096-57-0x00007FFCBBB90000-0x00007FFCBC651000-memory.dmp

              Filesize

              10.8MB