Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    21-07-2024 08:15

General

  • Target

    5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147.exe

  • Size

    2.0MB

  • MD5

    6e4e01af6b88116f0c7331bba5e7b782

  • SHA1

    756c0a5ea8aac86f41d118166452a011a608043c

  • SHA256

    5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147

  • SHA512

    f49b6146f313624606a9eb80287c23c68aaefcf7ffafacba83a87b333b4388dd38a423a179b7bcb0e1d555873681b405c781faf68e2d7169fa7bcefe4a73874b

  • SSDEEP

    24576:jYe7C5QSBzoU/n15NuQtG+7IwzwT2wLqq12OBOa2WYO3QFSBztYSqEEU5oZUSzTO:jYemPM0tvmwGBF223ZztBqEqx9v

Malware Config

Signatures

  • DcRat 35 IoCs

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

  • Modifies WinLogon for persistence 2 TTPs 11 IoCs
  • Process spawned unexpected child process 33 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 22 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in Program Files directory 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 33 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 26 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\5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147.exe
    "C:\Users\Admin\AppData\Local\Temp\5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147.exe"
    1⤵
    • DcRat
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2392
    • C:\Users\Default User\sppsvc.exe
      "C:\Users\Default User\sppsvc.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1484
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Sidebar\ja-JP\smss.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2812
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Program Files\Windows Sidebar\ja-JP\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2832
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Sidebar\ja-JP\smss.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2816
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\sppsvc.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2868
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Default User\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2808
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 7 /tr "'C:\Users\Default User\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2976
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 11 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2660
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2668
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2620
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 9 /tr "'C:\Recovery\b2a802a2-3b12-11ef-8991-d2f1755c8afd\lsm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2692
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Recovery\b2a802a2-3b12-11ef-8991-d2f1755c8afd\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3060
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 11 /tr "'C:\Recovery\b2a802a2-3b12-11ef-8991-d2f1755c8afd\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2172
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\winlogon.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:324
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1988
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\winlogon.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1232
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Program Files\Windows Photo Viewer\de-DE\sppsvc.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2936
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\de-DE\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1616
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Photo Viewer\de-DE\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2516
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\lsm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:640
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1996
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\lsm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2688
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\Idle.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2932
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\MSOCache\All Users\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2136
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1920
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Saved Games\dwm.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:776
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Users\Admin\Saved Games\dwm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2432
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\Saved Games\dwm.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1940
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 13 /tr "'C:\Recovery\b2a802a2-3b12-11ef-8991-d2f1755c8afd\Idle.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2452
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Recovery\b2a802a2-3b12-11ef-8991-d2f1755c8afd\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:784
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Recovery\b2a802a2-3b12-11ef-8991-d2f1755c8afd\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2912
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 12 /tr "'C:\Program Files\Windows NT\Accessories\ja-JP\Idle.exe'" /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1456
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Windows NT\Accessories\ja-JP\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1764
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows NT\Accessories\ja-JP\Idle.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2996

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSOCache\All Users\{90140000-0019-0409-0000-0000000FF1CE}-C\winlogon.exe

    Filesize

    2.0MB

    MD5

    6e4e01af6b88116f0c7331bba5e7b782

    SHA1

    756c0a5ea8aac86f41d118166452a011a608043c

    SHA256

    5a335f4ea90b29144cf268dccdc8f8e1757e57cccc941cc7334b8f4bd7999147

    SHA512

    f49b6146f313624606a9eb80287c23c68aaefcf7ffafacba83a87b333b4388dd38a423a179b7bcb0e1d555873681b405c781faf68e2d7169fa7bcefe4a73874b

  • memory/1484-39-0x0000000000BB0000-0x0000000000DBE000-memory.dmp

    Filesize

    2.1MB

  • memory/2392-6-0x00000000006B0000-0x00000000006BC000-memory.dmp

    Filesize

    48KB

  • memory/2392-3-0x00000000005D0000-0x00000000005DE000-memory.dmp

    Filesize

    56KB

  • memory/2392-4-0x00000000006A0000-0x00000000006A8000-memory.dmp

    Filesize

    32KB

  • memory/2392-5-0x000000001AD60000-0x000000001ADB6000-memory.dmp

    Filesize

    344KB

  • memory/2392-0-0x000007FEF5463000-0x000007FEF5464000-memory.dmp

    Filesize

    4KB

  • memory/2392-7-0x00000000006C0000-0x00000000006CC000-memory.dmp

    Filesize

    48KB

  • memory/2392-8-0x0000000000760000-0x000000000076C000-memory.dmp

    Filesize

    48KB

  • memory/2392-11-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp

    Filesize

    9.9MB

  • memory/2392-2-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp

    Filesize

    9.9MB

  • memory/2392-1-0x0000000000120000-0x000000000032E000-memory.dmp

    Filesize

    2.1MB

  • memory/2392-38-0x000007FEF5460000-0x000007FEF5E4C000-memory.dmp

    Filesize

    9.9MB