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Analysis

  • max time kernel
    15s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    13/01/2025, 19:47

General

  • Target

    891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476N.exe

  • Size

    783KB

  • MD5

    2dec334a3f065bc25c47a22de6a51b50

  • SHA1

    2d8ea87b76172f1b112445067a4109b9b5d23cc7

  • SHA256

    891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476

  • SHA512

    4264fa67d68d0f942128117e8883f7f8e2715fb65a3fbe550ae1b0e095d57cd79acf8437ede86bfe233d78f14ac200967671461555797356e37f4b0914626549

  • SSDEEP

    12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q

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 5 IoCs

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

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

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 6 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 8 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 6 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • System policy modification 1 TTPs 3 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\891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476N.exe
    "C:\Users\Admin\AppData\Local\Temp\891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476N.exe"
    1⤵
    • UAC bypass
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:2368
    • C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\lsm.exe
      "C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\lsm.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2960
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Sidebar\Gadgets\Calendar.Gadget\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Scheduled Task/Job: Scheduled Task
    PID:2800
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\taskhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2876
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\Vss\Writers\Application\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2628
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Admin\Local Settings\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2864
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\mpssvc\WmiPrvSE.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files\Microsoft Games\Mahjong\ja-JP\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2720

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\System32\wbem\mpssvc\WmiPrvSE.exe

    Filesize

    783KB

    MD5

    2dec334a3f065bc25c47a22de6a51b50

    SHA1

    2d8ea87b76172f1b112445067a4109b9b5d23cc7

    SHA256

    891606919ee03cfd0b194f6ca30e3937312ba92c7225057763bc6f8980484476

    SHA512

    4264fa67d68d0f942128117e8883f7f8e2715fb65a3fbe550ae1b0e095d57cd79acf8437ede86bfe233d78f14ac200967671461555797356e37f4b0914626549

  • memory/2368-13-0x0000000000920000-0x0000000000928000-memory.dmp

    Filesize

    32KB

  • memory/2368-4-0x00000000003F0000-0x00000000003F8000-memory.dmp

    Filesize

    32KB

  • memory/2368-3-0x00000000003E0000-0x00000000003E8000-memory.dmp

    Filesize

    32KB

  • memory/2368-8-0x0000000000450000-0x000000000045A000-memory.dmp

    Filesize

    40KB

  • memory/2368-7-0x0000000000420000-0x000000000042C000-memory.dmp

    Filesize

    48KB

  • memory/2368-10-0x0000000000460000-0x0000000000468000-memory.dmp

    Filesize

    32KB

  • memory/2368-9-0x0000000000430000-0x000000000043A000-memory.dmp

    Filesize

    40KB

  • memory/2368-6-0x0000000000410000-0x0000000000418000-memory.dmp

    Filesize

    32KB

  • memory/2368-12-0x0000000000470000-0x0000000000478000-memory.dmp

    Filesize

    32KB

  • memory/2368-11-0x0000000000440000-0x0000000000448000-memory.dmp

    Filesize

    32KB

  • memory/2368-5-0x0000000000400000-0x0000000000410000-memory.dmp

    Filesize

    64KB

  • memory/2368-0-0x000007FEF6343000-0x000007FEF6344000-memory.dmp

    Filesize

    4KB

  • memory/2368-2-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

  • memory/2368-18-0x0000000001F50000-0x0000000001F58000-memory.dmp

    Filesize

    32KB

  • memory/2368-25-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

  • memory/2368-15-0x0000000001F40000-0x0000000001F48000-memory.dmp

    Filesize

    32KB

  • memory/2368-22-0x0000000001F80000-0x0000000001F88000-memory.dmp

    Filesize

    32KB

  • memory/2368-21-0x0000000001F70000-0x0000000001F7C000-memory.dmp

    Filesize

    48KB

  • memory/2368-16-0x0000000000940000-0x0000000000948000-memory.dmp

    Filesize

    32KB

  • memory/2368-20-0x0000000001F60000-0x0000000001F68000-memory.dmp

    Filesize

    32KB

  • memory/2368-19-0x0000000000950000-0x0000000000958000-memory.dmp

    Filesize

    32KB

  • memory/2368-14-0x0000000000930000-0x0000000000938000-memory.dmp

    Filesize

    32KB

  • memory/2368-17-0x0000000001F30000-0x0000000001F38000-memory.dmp

    Filesize

    32KB

  • memory/2368-1-0x0000000000960000-0x0000000000A2A000-memory.dmp

    Filesize

    808KB

  • memory/2368-88-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

  • memory/2960-87-0x0000000001280000-0x000000000134A000-memory.dmp

    Filesize

    808KB