Analysis

  • max time kernel
    62s
  • max time network
    18s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    23-11-2024 16:53

General

  • Target

    6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc.exe

  • Size

    2.1MB

  • MD5

    3a32de4764e961e8726b94606a07b57a

  • SHA1

    8489600185b3ce974e4003f9ee37abde5a0f5da2

  • SHA256

    6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc

  • SHA512

    e97a903b23d8d18553f7f7bbb474644f1ef89c5122822d404bcb4e740cbc9763d504b4241367a5beaa49ec6f6181734ae59c8bfba2119ba6e632866816434f08

  • SSDEEP

    24576:zZxyxNwUMrdtki6lbi5YH63JUKUwcp4TOQdXzzBNhL+Ll8HOiD7Kl4kup3B2ngov:SHwLrdtkbaCwcp4RXL7D764zB2qHG

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 7 IoCs
  • Process spawned unexpected child process 7 IoCs

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

  • 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 14 IoCs
  • Drops file in System32 directory 11 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 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\6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc.exe
    "C:\Users\Admin\AppData\Local\Temp\6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2884
    • C:\Windows\System32\qmgr\lsm.exe
      "C:\Windows\System32\qmgr\lsm.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2116
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\recdisc\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\qmgr\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2868
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\ASPNETSetup_00001\6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2664
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\Panther\setup.exe\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2740
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\ntevt\WmiPrvSE.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2148
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\System32\DocumentPerformanceEvents\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3020
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\System32\msclmd\wininit.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2024

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2.1MB

    MD5

    3a32de4764e961e8726b94606a07b57a

    SHA1

    8489600185b3ce974e4003f9ee37abde5a0f5da2

    SHA256

    6b6db8b011dd68c40548c8ee860610a61fd6832914f25ffe631d0af51675a5fc

    SHA512

    e97a903b23d8d18553f7f7bbb474644f1ef89c5122822d404bcb4e740cbc9763d504b4241367a5beaa49ec6f6181734ae59c8bfba2119ba6e632866816434f08

  • memory/2116-26-0x0000000000150000-0x0000000000158000-memory.dmp

    Filesize

    32KB

  • memory/2116-29-0x0000000000390000-0x0000000000398000-memory.dmp

    Filesize

    32KB

  • memory/2116-32-0x00000000003D0000-0x00000000003D8000-memory.dmp

    Filesize

    32KB

  • memory/2116-23-0x0000000000D40000-0x0000000000F62000-memory.dmp

    Filesize

    2.1MB

  • memory/2116-33-0x00000000003E0000-0x00000000003EC000-memory.dmp

    Filesize

    48KB

  • memory/2116-31-0x00000000003C0000-0x00000000003C8000-memory.dmp

    Filesize

    32KB

  • memory/2116-25-0x0000000000140000-0x000000000014C000-memory.dmp

    Filesize

    48KB

  • memory/2116-27-0x0000000000380000-0x000000000038E000-memory.dmp

    Filesize

    56KB

  • memory/2116-28-0x00000000006D0000-0x0000000000726000-memory.dmp

    Filesize

    344KB

  • memory/2116-30-0x00000000003A0000-0x00000000003A8000-memory.dmp

    Filesize

    32KB

  • memory/2884-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2884-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

    Filesize

    4KB

  • memory/2884-24-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2884-1-0x0000000000820000-0x0000000000A42000-memory.dmp

    Filesize

    2.1MB