Analysis

  • max time kernel
    143s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2023, 01:07

General

  • Target

    NEAS.01a66ce702b81396f987e22d5c5513a0.exe

  • Size

    783KB

  • MD5

    01a66ce702b81396f987e22d5c5513a0

  • SHA1

    007e52fa1766724d21a7305fe0f0209fb67c8fc8

  • SHA256

    b08756ce1a131b1b6037549e8133e5e0d85e4eccd3ca97242dfe9827138e0c67

  • SHA512

    a70a72d2b5f7ac3e8d08c43577257c913c054017f0c44e4bfceb308005693cfc457a7dd29d72878546f4ab8ba58b2a24632718c37e336613e18f74cda3497f16

  • SSDEEP

    12288:mqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:m+OQbpbgsFdAyQvzSqaq8q

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 4 IoCs

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

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

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 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\NEAS.01a66ce702b81396f987e22d5c5513a0.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.01a66ce702b81396f987e22d5c5513a0.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
    • System policy modification
    PID:4076
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\PerfLogs\backgroundTaskHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3792
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\bootstat\explorer.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3052
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SearchApp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3660
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3060

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Windows\System32\moshostcore\taskhostw.exe

          Filesize

          783KB

          MD5

          01a66ce702b81396f987e22d5c5513a0

          SHA1

          007e52fa1766724d21a7305fe0f0209fb67c8fc8

          SHA256

          b08756ce1a131b1b6037549e8133e5e0d85e4eccd3ca97242dfe9827138e0c67

          SHA512

          a70a72d2b5f7ac3e8d08c43577257c913c054017f0c44e4bfceb308005693cfc457a7dd29d72878546f4ab8ba58b2a24632718c37e336613e18f74cda3497f16

        • memory/4076-13-0x00000000012C0000-0x00000000012C8000-memory.dmp

          Filesize

          32KB

        • memory/4076-24-0x000000001B740000-0x000000001B748000-memory.dmp

          Filesize

          32KB

        • memory/4076-3-0x0000000001210000-0x0000000001218000-memory.dmp

          Filesize

          32KB

        • memory/4076-4-0x0000000001220000-0x0000000001228000-memory.dmp

          Filesize

          32KB

        • memory/4076-12-0x0000000001280000-0x0000000001288000-memory.dmp

          Filesize

          32KB

        • memory/4076-7-0x0000000001250000-0x000000000125C000-memory.dmp

          Filesize

          48KB

        • memory/4076-6-0x0000000001240000-0x0000000001248000-memory.dmp

          Filesize

          32KB

        • memory/4076-8-0x0000000001290000-0x000000000129A000-memory.dmp

          Filesize

          40KB

        • memory/4076-9-0x0000000001270000-0x000000000127A000-memory.dmp

          Filesize

          40KB

        • memory/4076-10-0x0000000001260000-0x0000000001268000-memory.dmp

          Filesize

          32KB

        • memory/4076-11-0x00000000012A0000-0x00000000012A8000-memory.dmp

          Filesize

          32KB

        • memory/4076-14-0x0000000002B80000-0x0000000002B88000-memory.dmp

          Filesize

          32KB

        • memory/4076-2-0x000000001B600000-0x000000001B610000-memory.dmp

          Filesize

          64KB

        • memory/4076-15-0x0000000002B90000-0x0000000002B98000-memory.dmp

          Filesize

          32KB

        • memory/4076-5-0x0000000001230000-0x0000000001240000-memory.dmp

          Filesize

          64KB

        • memory/4076-16-0x0000000002BA0000-0x0000000002BA8000-memory.dmp

          Filesize

          32KB

        • memory/4076-17-0x0000000002BB0000-0x0000000002BB8000-memory.dmp

          Filesize

          32KB

        • memory/4076-18-0x0000000002BC0000-0x0000000002BC8000-memory.dmp

          Filesize

          32KB

        • memory/4076-20-0x000000001B600000-0x000000001B610000-memory.dmp

          Filesize

          64KB

        • memory/4076-22-0x000000001B720000-0x000000001B728000-memory.dmp

          Filesize

          32KB

        • memory/4076-21-0x000000001B600000-0x000000001B610000-memory.dmp

          Filesize

          64KB

        • memory/4076-23-0x000000001B730000-0x000000001B73C000-memory.dmp

          Filesize

          48KB

        • memory/4076-19-0x000000001B710000-0x000000001B718000-memory.dmp

          Filesize

          32KB

        • memory/4076-0-0x0000000000890000-0x000000000095A000-memory.dmp

          Filesize

          808KB

        • memory/4076-25-0x000000001B600000-0x000000001B610000-memory.dmp

          Filesize

          64KB

        • memory/4076-26-0x000000001B600000-0x000000001B610000-memory.dmp

          Filesize

          64KB

        • memory/4076-1-0x00007FF95A460000-0x00007FF95AF21000-memory.dmp

          Filesize

          10.8MB

        • memory/4076-37-0x00007FF95A460000-0x00007FF95AF21000-memory.dmp

          Filesize

          10.8MB