Analysis

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

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-10-2024 04:17

General

  • Target

    6258C0D7C31A5BA4B2B0CB9C97606ACD.exe

  • Size

    2.8MB

  • MD5

    6258c0d7c31a5ba4b2b0cb9c97606acd

  • SHA1

    123138131fc33eeeedc82e795f201981232a55b1

  • SHA256

    8d5514730f330a6f4ae9b1807f0c77ed15975d469c7c92c10c690ed681210ed4

  • SHA512

    9e8248a258475bf8676b041073da7985a3b0a6e57cf7293415e3dd1e6e8fd6bd0056ba4d60b33f6d4c0cfec4b3f33c43e88881c6a0f6fc52f3654ff12022875e

  • SSDEEP

    49152:rPloaBLYs0dLLXmgmQPDWSJNCQdi2GjyIlAd28nZbmsl+S2sJaOP:rPl7ZoLbFmsPNHi2GjLAdVlqO

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 24 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 9 IoCs
  • Drops file in Windows directory 3 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 24 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 2 IoCs
  • System policy modification 1 TTPs 6 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\6258C0D7C31A5BA4B2B0CB9C97606ACD.exe
    "C:\Users\Admin\AppData\Local\Temp\6258C0D7C31A5BA4B2B0CB9C97606ACD.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • 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
    • System policy modification
    PID:3880
    • C:\Users\Default\sysmon.exe
      "C:\Users\Default\sysmon.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:1364
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "6258C0D7C31A5BA4B2B0CB9C97606ACD6" /sc MINUTE /mo 8 /tr "'C:\Recovery\WindowsRE\6258C0D7C31A5BA4B2B0CB9C97606ACD.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4708
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "6258C0D7C31A5BA4B2B0CB9C97606ACD" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\6258C0D7C31A5BA4B2B0CB9C97606ACD.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:840
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "6258C0D7C31A5BA4B2B0CB9C97606ACD6" /sc MINUTE /mo 14 /tr "'C:\Recovery\WindowsRE\6258C0D7C31A5BA4B2B0CB9C97606ACD.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 6 /tr "'C:\Program Files (x86)\Windows Portable Devices\services.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4780
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1624
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows Portable Devices\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4612
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 6 /tr "'C:\Users\Default\services.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1480
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3388
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "servicess" /sc MINUTE /mo 11 /tr "'C:\Users\Default\services.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1940
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 11 /tr "'C:\Users\Default\sysmon.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1832
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Users\Default\sysmon.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 "sysmons" /sc MINUTE /mo 6 /tr "'C:\Users\Default\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2828
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 10 /tr "'C:\Windows\Tasks\Idle.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2296
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\Tasks\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4980
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Windows\Tasks\Idle.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2260
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:516
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4656
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 10 /tr "'C:\Recovery\WindowsRE\upfc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2240
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1664
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1140
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmons" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:4908
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Google\lsass.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2060
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Google\lsass.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1600

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\Tasks\Idle.exe

    Filesize

    2.8MB

    MD5

    6258c0d7c31a5ba4b2b0cb9c97606acd

    SHA1

    123138131fc33eeeedc82e795f201981232a55b1

    SHA256

    8d5514730f330a6f4ae9b1807f0c77ed15975d469c7c92c10c690ed681210ed4

    SHA512

    9e8248a258475bf8676b041073da7985a3b0a6e57cf7293415e3dd1e6e8fd6bd0056ba4d60b33f6d4c0cfec4b3f33c43e88881c6a0f6fc52f3654ff12022875e

  • memory/1364-108-0x0000000003420000-0x0000000003432000-memory.dmp

    Filesize

    72KB

  • memory/1364-107-0x00000000033B0000-0x00000000033C2000-memory.dmp

    Filesize

    72KB

  • memory/3880-12-0x000000001C210000-0x000000001C266000-memory.dmp

    Filesize

    344KB

  • memory/3880-14-0x0000000002F80000-0x0000000002F92000-memory.dmp

    Filesize

    72KB

  • memory/3880-5-0x000000001BBA0000-0x000000001BBF0000-memory.dmp

    Filesize

    320KB

  • memory/3880-7-0x0000000002F10000-0x0000000002F20000-memory.dmp

    Filesize

    64KB

  • memory/3880-6-0x0000000002ED0000-0x0000000002ED8000-memory.dmp

    Filesize

    32KB

  • memory/3880-8-0x0000000002F20000-0x0000000002F36000-memory.dmp

    Filesize

    88KB

  • memory/3880-9-0x0000000002F40000-0x0000000002F48000-memory.dmp

    Filesize

    32KB

  • memory/3880-10-0x0000000002F70000-0x0000000002F82000-memory.dmp

    Filesize

    72KB

  • memory/3880-11-0x0000000002F60000-0x0000000002F6A000-memory.dmp

    Filesize

    40KB

  • memory/3880-0-0x00007FFC7BC93000-0x00007FFC7BC95000-memory.dmp

    Filesize

    8KB

  • memory/3880-13-0x0000000002F50000-0x0000000002F58000-memory.dmp

    Filesize

    32KB

  • memory/3880-4-0x0000000002EF0000-0x0000000002F0C000-memory.dmp

    Filesize

    112KB

  • memory/3880-15-0x000000001C7B0000-0x000000001CCD8000-memory.dmp

    Filesize

    5.2MB

  • memory/3880-16-0x0000000002F90000-0x0000000002F98000-memory.dmp

    Filesize

    32KB

  • memory/3880-17-0x000000001BA80000-0x000000001BA8C000-memory.dmp

    Filesize

    48KB

  • memory/3880-18-0x000000001BBF0000-0x000000001BBFC000-memory.dmp

    Filesize

    48KB

  • memory/3880-19-0x000000001C380000-0x000000001C38E000-memory.dmp

    Filesize

    56KB

  • memory/3880-20-0x000000001C390000-0x000000001C39C000-memory.dmp

    Filesize

    48KB

  • memory/3880-22-0x000000001C4B0000-0x000000001C4BC000-memory.dmp

    Filesize

    48KB

  • memory/3880-21-0x000000001C4A0000-0x000000001C4AA000-memory.dmp

    Filesize

    40KB

  • memory/3880-3-0x0000000002EC0000-0x0000000002ECE000-memory.dmp

    Filesize

    56KB

  • memory/3880-106-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

    Filesize

    10.8MB

  • memory/3880-2-0x00007FFC7BC90000-0x00007FFC7C751000-memory.dmp

    Filesize

    10.8MB

  • memory/3880-1-0x0000000000AE0000-0x0000000000DB2000-memory.dmp

    Filesize

    2.8MB