Analysis

  • max time kernel
    142s
  • 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
    24-11-2024 02:28

General

  • Target

    8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82.exe

  • Size

    2.1MB

  • MD5

    f4620c0afa8e21897509b2e7215097f5

  • SHA1

    af216ca6105e271a3fb45a23c10ee7cf3158b7e1

  • SHA256

    8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82

  • SHA512

    68b875acc06d9c3796f49377b5b25a5e8b9a380221eea59e4274249ca7d2bff10c3fc5edf50eae5da726afea882e0e777af86af25be7b57c8fbfd70448d8d7dd

  • SSDEEP

    49152:IBJz3c6UY0hj8eu32ILwfhNE5I6OrLCXLdsN6:yh3cvY0Z8pGWwfhyxOrUsN6

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.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 5 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 WriteProcessMemory 16 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\8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82.exe
    "C:\Users\Admin\AppData\Local\Temp\8daf7dcdf256d7de40d33e5550dc5e8bbf887b8c4b7f49c79a15c96dad867f82.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1208
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Medal\LziQ5Qlyzu0f0C5NtfHJq0w.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:516
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Medal\Fua65ZRdZNJ5OJAqSXb7513NtPonCq4dK3Ubpg1B.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4040
        • C:\Medal\Medal.exe
          "C:\Medal/Medal.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:4376
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\G6ZntJDyPq.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2560
            • C:\Windows\system32\chcp.com
              chcp 65001
              6⤵
                PID:2280
              • C:\Windows\system32\w32tm.exe
                w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                6⤵
                  PID:5056
                • C:\Medal\Medal.exe
                  "C:\Medal\Medal.exe"
                  6⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious behavior: GetForegroundWindowSpam
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2416
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Mail\smss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3644
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Windows Mail\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1836
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Mail\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1688
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 13 /tr "'C:\Users\Default User\taskhostw.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2216
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Users\Default User\taskhostw.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3724
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\taskhostw.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1520
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Windows\Offline Web Pages\sihost.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:960
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Windows\Offline Web Pages\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1556
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 14 /tr "'C:\Windows\Offline Web Pages\sihost.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1420
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 14 /tr "'C:\Medal\services.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1696
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Medal\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2076
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "servicess" /sc MINUTE /mo 7 /tr "'C:\Medal\services.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3476
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 6 /tr "'C:\Windows\IdentityCRL\INT\unsecapp.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3300
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\IdentityCRL\INT\unsecapp.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3232
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 9 /tr "'C:\Windows\IdentityCRL\INT\unsecapp.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3636
      • 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:4108
      • 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:2504
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "MedalM" /sc MINUTE /mo 6 /tr "'C:\Medal\Medal.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4060

      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\Microsoft\CLR_v4.0\UsageLogs\Medal.exe.log

        Filesize

        1KB

        MD5

        af6acd95d59de87c04642509c30e81c1

        SHA1

        f9549ae93fdb0a5861a79a08f60aa81c4b32377b

        SHA256

        7521ee2d065a78efcab55a194fbd78492f84b70595f139263875f4ea92b194d6

        SHA512

        93ab99bcf588fde553de3240e0d2b0cbd4e4bc5ef5e99d53f45a267d7ff30103a80b5a7aa1c52d6eff1e070af0ec82d2c0b8aafb7099742aa16810edc1815c3a

      • C:\Users\Admin\AppData\Local\Temp\G6ZntJDyPq.bat

        Filesize

        194B

        MD5

        e0348884ec3285ab518e50caedd5f4c8

        SHA1

        b12f99fe32ab8a0d88c3f3e94beea4a9892b7348

        SHA256

        2d0c995989da008637693efa0b6912fd8a7293d93d1fd9dbe693e6c8096e8cd8

        SHA512

        bdefc2c86d8e0e32560b87ec01a1f8cf7c3bd84bf2ce12cb2717f1bd7db4432ab51071ffa2124dd4709f5c5743688633ba9ffa92b4af3803e1fc4cc671ba77ee

      • memory/4376-12-0x00007FFEA9743000-0x00007FFEA9745000-memory.dmp

        Filesize

        8KB

      • memory/4376-13-0x0000000000F00000-0x00000000010DE000-memory.dmp

        Filesize

        1.9MB

      • memory/4376-15-0x00000000030A0000-0x00000000030AE000-memory.dmp

        Filesize

        56KB

      • memory/4376-17-0x0000000003110000-0x000000000312C000-memory.dmp

        Filesize

        112KB

      • memory/4376-18-0x000000001BCB0000-0x000000001BD00000-memory.dmp

        Filesize

        320KB

      • memory/4376-20-0x0000000003130000-0x0000000003148000-memory.dmp

        Filesize

        96KB

      • memory/4376-22-0x00000000030F0000-0x00000000030FE000-memory.dmp

        Filesize

        56KB