Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-10-2024 03:40

General

  • Target

    9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942.exe

  • Size

    1.6MB

  • MD5

    844679e76d8254bedd67c98610f7d7ac

  • SHA1

    4222ebbb055830096b829f072783423dbe255932

  • SHA256

    9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942

  • SHA512

    fddb80736936d7c0d46ec3958885237681cbbd416455d7a48d075092d38a0c5e435112c25b595b8cc99b0a8ed2143ac2f28e893373a7b6e9772ee722706a3c05

  • SSDEEP

    24576:2ztKoZmCJ4YrujnaOBDEzKt3pJqc7BnA8js2TvgAts0qB0FjbpcKSzQy8v1:O995MUzKNac7BnbbTvgCFTYQy+

Score
10/10

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 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 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 behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 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\9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942.exe
    "C:\Users\Admin\AppData\Local\Temp\9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942.exe"
    1⤵
    • Checks computer location settings
    • 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:2980
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\PNkK84xdf9.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4256
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1592
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          3⤵
            PID:4332
          • C:\Program Files (x86)\Windows Photo Viewer\de-DE\RuntimeBroker.exe
            "C:\Program Files (x86)\Windows Photo Viewer\de-DE\RuntimeBroker.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:4944
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\SppExtComObj.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1108
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\SppExtComObj.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4208
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Mozilla Maintenance Service\logs\SppExtComObj.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3188
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3488
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3928
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\csrss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2712
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Recovery\WindowsRE\smss.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1220
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1768
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\Recovery\WindowsRE\smss.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:724
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\RuntimeBroker.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3988
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1468
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Photo Viewer\de-DE\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4504
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows Portable Devices\RuntimeBroker.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:1168
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4252
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Portable Devices\RuntimeBroker.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4644
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a219429" /sc MINUTE /mo 14 /tr "'C:\Users\Admin\AppData\Local\Temp\9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942.exe'" /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:2992
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:3360
      • C:\Windows\system32\schtasks.exe
        schtasks.exe /create /tn "9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a219429" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\AppData\Local\Temp\9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942.exe'" /rl HIGHEST /f
        1⤵
        • Process spawned unexpected child process
        • Scheduled Task/Job: Scheduled Task
        PID:4872

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Program Files (x86)\Mozilla Maintenance Service\logs\SppExtComObj.exe

        Filesize

        1.6MB

        MD5

        844679e76d8254bedd67c98610f7d7ac

        SHA1

        4222ebbb055830096b829f072783423dbe255932

        SHA256

        9b08f03985d3378123ba236fae1b41b42fcc9af87932655a5120e04fa9a21942

        SHA512

        fddb80736936d7c0d46ec3958885237681cbbd416455d7a48d075092d38a0c5e435112c25b595b8cc99b0a8ed2143ac2f28e893373a7b6e9772ee722706a3c05

      • C:\Users\Admin\AppData\Local\Temp\PNkK84xdf9.bat

        Filesize

        243B

        MD5

        e560d37bc071a5949ebf851033b8b3a1

        SHA1

        833ee1f51f4c4b8afda80b99cd7e75893c1c3c1c

        SHA256

        0d351c0d57aee2c9fba137e09c78c7dad5bae9f8f7bafd7e3c8f3b48b812c661

        SHA512

        ced97cc6107985f09ff30084803632fcf4e005922e8ac2167ab692b335ae28081d4211561bd0080ab05a768116894d74e6b1329752b30755571f63b2d5be0334

      • memory/2980-3-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-0-0x00007FFDF7453000-0x00007FFDF7455000-memory.dmp

        Filesize

        8KB

      • memory/2980-4-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-7-0x00000000030A0000-0x00000000030AE000-memory.dmp

        Filesize

        56KB

      • memory/2980-5-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-8-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-11-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-2-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-21-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-27-0x000000001C9D0000-0x000000001CA1E000-memory.dmp

        Filesize

        312KB

      • memory/2980-28-0x00007FFDF7450000-0x00007FFDF7F11000-memory.dmp

        Filesize

        10.8MB

      • memory/2980-1-0x0000000000E20000-0x0000000000FC2000-memory.dmp

        Filesize

        1.6MB

      • memory/4944-34-0x000000001D0B0000-0x000000001D0FE000-memory.dmp

        Filesize

        312KB