Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    19/01/2025, 03:31

General

  • Target
    154029aecb8134930418ece2437864b8.exe
  • Size 1.5MB
  • Sample250119-d22qdsvmem
  • SHA256 394c5bdb282b16f8fc323f01c9a0ebe0a3824c95efbc082a5ae7b1d547ab3617
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

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 24 IoCs

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

  • DCRat payload 5 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Drops file in Windows directory 15 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 24 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 9 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\154029aecb8134930418ece2437864b8.exe
    "C:\Users\Admin\AppData\Local\Temp\154029aecb8134930418ece2437864b8.exe"
    1⤵
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2376
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\NDYpU86GSv.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:752
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:320
        • C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe
          "C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe"
          3⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2188
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2872
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2896
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2972
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2968
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2904
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 11 /tr "'C:\Windows\L2Schemas\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2648
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\dwm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2792
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2824
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2644
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 6 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2600
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3056
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3060
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 7 /tr "'C:\Windows\de-DE\spoolsv.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1768
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\de-DE\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:308
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Windows\de-DE\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2060
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 11 /tr "'C:\Windows\DigitalLocker\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1200
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Windows\DigitalLocker\Idle.exe'" /rl HIGHEST /f
      1⤵
      • 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 10 /tr "'C:\Windows\DigitalLocker\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2024
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 11 /tr "'C:\Users\Default User\lsass.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2164
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Users\Default User\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1916
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Users\Default User\lsass.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1268
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "154029aecb8134930418ece2437864b81" /sc MINUTE /mo 7 /tr "'C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1612
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "154029aecb8134930418ece2437864b8" /sc ONLOGON /tr "'C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1508
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "154029aecb8134930418ece2437864b81" /sc MINUTE /mo 5 /tr "'C:\Program Files\Java\jdk1.7.0_80\bin\154029aecb8134930418ece2437864b8.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1732

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          RCXBD8C.tmp

          • Path C:\MSOCache\All Users\{90140000-001A-0409-0000-0000000FF1CE}-C\RCXBD8C.tmp
          • Size 1.5MB
          • SHA256 6344d2c73350e07c8e30d64180483de154713efe517422b4b23d6a9de376901e
          • MD5 SHA1 SHA512 SSDEEP

          csrss.exe

          • Path C:\Recovery\1a287102-69f6-11ef-b2ff-62cb582c238c\csrss.exe
          • Size 1.5MB
          • SHA256 68629c937c7603b54531e10b18bf74368a9da0b4039182d82d049e598800ada4
          • MD5 SHA1 SHA512 SSDEEP

          NDYpU86GSv.bat

          • Path C:\Users\Admin\AppData\Local\Temp\NDYpU86GSv.bat
          • Size 224B
          • SHA256 b96101f3eb1be278c16ecfd6c77cfea5c5025179b70ca7bfbfb69f35654b62c0
          • MD5 SHA1 SHA512

          spoolsv.exe

          • Path C:\Windows\de-DE\spoolsv.exe
          • Size 1.5MB
          • SHA256 394c5bdb282b16f8fc323f01c9a0ebe0a3824c95efbc082a5ae7b1d547ab3617
          • MD5 SHA1 SHA512 SSDEEP

          memory/2188-133-0x0000000000CC0000-0x0000000000E52000-memory.dmp

          memory/2376-4-0x0000000000380000-0x0000000000390000-memory.dmp

          memory/2376-6-0x00000000005B0000-0x00000000005C0000-memory.dmp

          memory/2376-7-0x00000000005C0000-0x00000000005CC000-memory.dmp

          memory/2376-8-0x00000000005D0000-0x00000000005DC000-memory.dmp

          memory/2376-9-0x00000000005E0000-0x00000000005EE000-memory.dmp

          memory/2376-10-0x00000000005F0000-0x00000000005FE000-memory.dmp

          memory/2376-11-0x0000000000680000-0x000000000068A000-memory.dmp

          memory/2376-5-0x0000000000590000-0x00000000005A6000-memory.dmp

          memory/2376-0-0x000007FEF6523000-0x000007FEF6524000-memory.dmp

          memory/2376-3-0x0000000000360000-0x000000000037C000-memory.dmp

          memory/2376-129-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

          memory/2376-2-0x000007FEF6520000-0x000007FEF6F0C000-memory.dmp

          memory/2376-1-0x00000000000B0000-0x0000000000242000-memory.dmp