Analysis

  • max time kernel
    141s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231025-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231025-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2023, 02:37

General

  • Target

    NEAS.d316c5acd7974aaa1cab464245b38ac0.exe

  • Size

    783KB

  • MD5

    d316c5acd7974aaa1cab464245b38ac0

  • SHA1

    9c7636717bb1063e0801a769aeef01bf15af1bb4

  • SHA256

    b55e235214350f8fe2b3e870aa318e1eefc3cbf7c29f4109e7944e32bb99d43d

  • SHA512

    c1251f6f48c716f167842262de085290f8aaff08ee4f676f8d47424ca2020326bf0b49a0c700e6b373c4200c5a4b4ca8b2f0105c2dccab74c4a4308b46d59a4b

  • 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.

  • Process spawned unexpected child process 3 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 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 6 IoCs
  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 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.d316c5acd7974aaa1cab464245b38ac0.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.d316c5acd7974aaa1cab464245b38ac0.exe"
    1⤵
    • UAC bypass
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:2712
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\Speech_OneCore\Engines\SR\en-US-N\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:852
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\AppxSignature\StartMenuExperienceHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4204
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.et-ee\OfficeClickToRun.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3004

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Windows\Speech_OneCore\Engines\SR\en-US-N\sysmon.exe

          Filesize

          783KB

          MD5

          d316c5acd7974aaa1cab464245b38ac0

          SHA1

          9c7636717bb1063e0801a769aeef01bf15af1bb4

          SHA256

          b55e235214350f8fe2b3e870aa318e1eefc3cbf7c29f4109e7944e32bb99d43d

          SHA512

          c1251f6f48c716f167842262de085290f8aaff08ee4f676f8d47424ca2020326bf0b49a0c700e6b373c4200c5a4b4ca8b2f0105c2dccab74c4a4308b46d59a4b

        • memory/2712-14-0x000000001B020000-0x000000001B028000-memory.dmp

          Filesize

          32KB

        • memory/2712-24-0x000000001B2C0000-0x000000001B2C8000-memory.dmp

          Filesize

          32KB

        • memory/2712-3-0x0000000000DE0000-0x0000000000DE8000-memory.dmp

          Filesize

          32KB

        • memory/2712-4-0x00000000026A0000-0x00000000026A8000-memory.dmp

          Filesize

          32KB

        • memory/2712-15-0x000000001B030000-0x000000001B038000-memory.dmp

          Filesize

          32KB

        • memory/2712-6-0x00000000026C0000-0x00000000026C8000-memory.dmp

          Filesize

          32KB

        • memory/2712-7-0x00000000026E0000-0x00000000026EC000-memory.dmp

          Filesize

          48KB

        • memory/2712-8-0x000000001AFE0000-0x000000001AFEA000-memory.dmp

          Filesize

          40KB

        • memory/2712-9-0x000000001AFF0000-0x000000001AFFA000-memory.dmp

          Filesize

          40KB

        • memory/2712-10-0x000000001B4A0000-0x000000001B4A8000-memory.dmp

          Filesize

          32KB

        • memory/2712-11-0x000000001AFD0000-0x000000001AFD8000-memory.dmp

          Filesize

          32KB

        • memory/2712-12-0x000000001B000000-0x000000001B008000-memory.dmp

          Filesize

          32KB

        • memory/2712-2-0x000000001B070000-0x000000001B080000-memory.dmp

          Filesize

          64KB

        • memory/2712-13-0x000000001B010000-0x000000001B018000-memory.dmp

          Filesize

          32KB

        • memory/2712-5-0x00000000026B0000-0x00000000026C0000-memory.dmp

          Filesize

          64KB

        • memory/2712-17-0x000000001B050000-0x000000001B058000-memory.dmp

          Filesize

          32KB

        • memory/2712-16-0x000000001B040000-0x000000001B048000-memory.dmp

          Filesize

          32KB

        • memory/2712-18-0x000000001B060000-0x000000001B068000-memory.dmp

          Filesize

          32KB

        • memory/2712-20-0x000000001B070000-0x000000001B080000-memory.dmp

          Filesize

          64KB

        • memory/2712-23-0x000000001B2B0000-0x000000001B2BC000-memory.dmp

          Filesize

          48KB

        • memory/2712-22-0x000000001B070000-0x000000001B080000-memory.dmp

          Filesize

          64KB

        • memory/2712-21-0x000000001B2A0000-0x000000001B2A8000-memory.dmp

          Filesize

          32KB

        • memory/2712-19-0x000000001B180000-0x000000001B188000-memory.dmp

          Filesize

          32KB

        • memory/2712-0-0x0000000000470000-0x000000000053A000-memory.dmp

          Filesize

          808KB

        • memory/2712-27-0x000000001B070000-0x000000001B080000-memory.dmp

          Filesize

          64KB

        • memory/2712-35-0x000000001B070000-0x000000001B080000-memory.dmp

          Filesize

          64KB

        • memory/2712-1-0x00007FFDE3560000-0x00007FFDE4021000-memory.dmp

          Filesize

          10.8MB

        • memory/2712-42-0x00007FFDE3560000-0x00007FFDE4021000-memory.dmp

          Filesize

          10.8MB