Resubmissions

25-11-2024 10:00

241125-l129jaxlhr 10

25-11-2024 09:58

241125-lzk9ma1kg1 10

25-11-2024 09:56

241125-lyt55s1kew 10

25-11-2024 09:46

241125-lrsnqswral 10

Analysis

  • max time kernel
    1797s
  • max time network
    1800s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    25-11-2024 10:00

General

  • Target

    EXECUTOR METEOR .exe

  • Size

    1.1MB

  • MD5

    e5be94d6e847bb7656e80201cacf67fb

  • SHA1

    cc1ce69eea609b5fc9ff18f09407b934690bcff3

  • SHA256

    be5c49fa94be78520ee83ed6230a80aaf0ae9dd4bb2d6053aa8f843131f2f506

  • SHA512

    306c26f1e72a32c479b8d9112e2e0c5d22fd0e46b02ae5fa7ffff51191c9d79a52a2dbe7d200e0dc9cccf0919cba3693905c8b2dc6c6fc8f3d7eaf883e388100

  • SSDEEP

    24576:U2G/nvxW3Ww0tiUfTyqyg1hIZ9XWp7wJO:UbA30L+ixx

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 15 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.

  • Executes dropped EXE 21 IoCs
  • Drops file in Program Files directory 4 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 15 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 21 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\EXECUTOR METEOR .exe
    "C:\Users\Admin\AppData\Local\Temp\EXECUTOR METEOR .exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\comReviewrefPerf\Elw8H.vbe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2780
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\comReviewrefPerf\8WD994.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:868
        • C:\comReviewrefPerf\surrogateRuntime.exe
          "C:\comReviewrefPerf\surrogateRuntime.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Modifies registry class
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4056
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\50Na293GUV.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:236
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:1032
              • C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe
                "C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                PID:4980
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4728
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1204
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2764
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Program Files\Uninstall Information\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:676
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3892
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\Program Files\Uninstall Information\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1104
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 13 /tr "'C:\comReviewrefPerf\SppExtComObj.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4604
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\comReviewrefPerf\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1792
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\comReviewrefPerf\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:904
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3832
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1128
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3824
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "surrogateRuntimes" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\surrogateRuntime.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:252
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "surrogateRuntime" /sc ONLOGON /tr "'C:\Users\All Users\surrogateRuntime.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:812
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "surrogateRuntimes" /sc MINUTE /mo 5 /tr "'C:\Users\All Users\surrogateRuntime.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2348
    • C:\Users\All Users\surrogateRuntime.exe
      "C:\Users\All Users\surrogateRuntime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1336
    • C:\Program Files\Uninstall Information\smss.exe
      "C:\Program Files\Uninstall Information\smss.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3664
    • C:\comReviewrefPerf\SppExtComObj.exe
      C:\comReviewrefPerf\SppExtComObj.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4764
    • C:\Users\All Users\surrogateRuntime.exe
      "C:\Users\All Users\surrogateRuntime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4776
    • C:\Recovery\WindowsRE\unsecapp.exe
      C:\Recovery\WindowsRE\unsecapp.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1592
    • C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe
      "C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1112
    • C:\Program Files\Uninstall Information\smss.exe
      "C:\Program Files\Uninstall Information\smss.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3148
    • C:\Users\All Users\surrogateRuntime.exe
      "C:\Users\All Users\surrogateRuntime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3400
    • C:\comReviewrefPerf\SppExtComObj.exe
      C:\comReviewrefPerf\SppExtComObj.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2136
    • C:\Program Files\Uninstall Information\smss.exe
      "C:\Program Files\Uninstall Information\smss.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1556
    • C:\Users\All Users\surrogateRuntime.exe
      "C:\Users\All Users\surrogateRuntime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4620
    • C:\Recovery\WindowsRE\unsecapp.exe
      C:\Recovery\WindowsRE\unsecapp.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2852
    • C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe
      "C:\Program Files\Windows Photo Viewer\ja-JP\spoolsv.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2136
    • C:\Program Files\Uninstall Information\smss.exe
      "C:\Program Files\Uninstall Information\smss.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:1208
    • C:\comReviewrefPerf\SppExtComObj.exe
      C:\comReviewrefPerf\SppExtComObj.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4004
    • C:\Users\All Users\surrogateRuntime.exe
      "C:\Users\All Users\surrogateRuntime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2248
    • C:\Users\All Users\surrogateRuntime.exe
      "C:\Users\All Users\surrogateRuntime.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2604
    • C:\Recovery\WindowsRE\unsecapp.exe
      C:\Recovery\WindowsRE\unsecapp.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4536
    • C:\Program Files\Uninstall Information\smss.exe
      "C:\Program Files\Uninstall Information\smss.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4316

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\smss.exe.log

      Filesize

      1KB

      MD5

      b4e91d2e5f40d5e2586a86cf3bb4df24

      SHA1

      31920b3a41aa4400d4a0230a7622848789b38672

      SHA256

      5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210

      SHA512

      968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\surrogateRuntime.exe.log

      Filesize

      1KB

      MD5

      400b532c938aca538f01c5616cf318cd

      SHA1

      598a59a9434e51a6416f91a4c83bd02505ecb846

      SHA256

      28e57db6d7535775b5e65c90ab208c7fe392e373056db5d35e76854270ecd05d

      SHA512

      b15583323c457d389b873eb31b8e59fef450c0c0e684b0f797231e8d0abace9227b15d4e45b45f4c79ad044a28cc3d79f9f7c2a81bd38e43b0c09f07aaa95b73

    • C:\Users\Admin\AppData\Local\Temp\50Na293GUV.bat

      Filesize

      220B

      MD5

      d1f6a85270930d161e14ba9af92e030d

      SHA1

      9711085aef902e5bdf380e3f00ad8fb0c42e517e

      SHA256

      64c3b0f04049d5c6dc8aafd0a7d80c9aac85bbdd5d5830bfa27b4e1206dac5c5

      SHA512

      3374b8f5983da84f3fbefaac495a1c475464c48ed22a933bdb2394cb107120fbcb307c936dea9757e3608f36fbf106bae9656104576a03698979eba803f080b2

    • C:\comReviewrefPerf\8WD994.bat

      Filesize

      42B

      MD5

      ff1d6e65d0b458accf2d7e9cf078f012

      SHA1

      4a7a0831b061ce2c72dfe5dbb8d3e06ef48fb9c4

      SHA256

      2a3d5e93e6c1c94626f81d252cf9e831a94337a8fc871efa3560fbe966e35580

      SHA512

      1888c69ad30ab13f71aee80de86aaebb04c1ee7b08bc4f8f5e41dc325399cdc1c3bb956d9401ea6c51b425305d2835fffcae60fc4b8644fab255c03f37431d15

    • C:\comReviewrefPerf\Elw8H.vbe

      Filesize

      200B

      MD5

      a44fada9f313e0d6008aef960aeae861

      SHA1

      9217e79ff49d67baca484f5a5e9418cca3fb9b2e

      SHA256

      1e5c949fd2059fda331f7cd178a359f2ac4d4dd8cdae76543f21493b2ffb9d44

      SHA512

      800052e7c0cd62433bde0084b94ac3b44ddece5adc144c8e02a2e7dc8629b683ac3a94c6218bf61a595731d2dc1adf596c5bf101fc2d9c3723c3a099d2c853f7

    • C:\comReviewrefPerf\surrogateRuntime.exe

      Filesize

      828KB

      MD5

      422e6efd4d4c62a97c78be894b85a535

      SHA1

      6de90977b41153d67fdca7a9119edf382d7e5414

      SHA256

      fddbbd909aeb6e9466e3c926f7773f23f84d392604a2619caa3f5a4c9d63eb8c

      SHA512

      1c545785df5e6be6b1142adb94cc6779020d409fddd429743eb69646b35a7acafadb2445218445bbc7e5c02171f1b531d9a7c623d834c18dd49161708529d388

    • memory/4056-12-0x00007FFC462F3000-0x00007FFC462F5000-memory.dmp

      Filesize

      8KB

    • memory/4056-13-0x0000000000210000-0x00000000002E6000-memory.dmp

      Filesize

      856KB

    • memory/4980-35-0x000000001BC10000-0x000000001BC1D000-memory.dmp

      Filesize

      52KB

    • memory/4980-36-0x000000001BC20000-0x000000001BC3E000-memory.dmp

      Filesize

      120KB

    • memory/4980-33-0x000000001BB90000-0x000000001BBD6000-memory.dmp

      Filesize

      280KB

    • memory/4980-37-0x000000001BC40000-0x000000001BC4B000-memory.dmp

      Filesize

      44KB

    • memory/4980-34-0x000000001BBE0000-0x000000001BBE9000-memory.dmp

      Filesize

      36KB