Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-11-2024 16:46

General

  • Target

    5e45962bd393c13522e7c9311b6e86a0.exe

  • Size

    1.0MB

  • MD5

    5e45962bd393c13522e7c9311b6e86a0

  • SHA1

    1ae02d2752979c4800ccd9c5a1c99c5a084211c8

  • SHA256

    7b9ddd730758e941e2fb8284386135a2d507d424a7021490c9227d79d36e9f15

  • SHA512

    20fa7439c5eb76b91fa999f3f49e1d690bb66ded1d9400b781c39ba6558108a6563f9ad42d94e9ca02f9d979c427169e349fdc120eb85228b243eb73086714b7

  • SSDEEP

    12288:kvOGN+Wr70uGCeYo5kuMri42BC26ms+Y9/Jdh3rUfSdJm/TJ8D/Xq7qLmKMa2:6+C700o5kuYswd7uSd4TaD/Xq3K/2

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.

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 11 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • 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 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • System policy modification 1 TTPs 6 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\5e45962bd393c13522e7c9311b6e86a0.exe
    "C:\Users\Admin\AppData\Local\Temp\5e45962bd393c13522e7c9311b6e86a0.exe"
    1⤵
    • UAC bypass
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4108
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\NrvbwqsVHN.bat"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4792
      • C:\Windows\system32\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
          PID:2776
        • C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\Idle.exe
          "C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\Idle.exe"
          3⤵
          • UAC bypass
          • Executes dropped EXE
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:2264
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "5e45962bd393c13522e7c9311b6e86a05" /sc MINUTE /mo 5 /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\5e45962bd393c13522e7c9311b6e86a0.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:552
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "5e45962bd393c13522e7c9311b6e86a0" /sc ONLOGON /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\5e45962bd393c13522e7c9311b6e86a0.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:5052
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "5e45962bd393c13522e7c9311b6e86a05" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Photo Viewer\ja-JP\5e45962bd393c13522e7c9311b6e86a0.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:996
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MusNotificationM" /sc MINUTE /mo 6 /tr "'C:\Users\Admin\NetHood\MusNotification.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3892
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MusNotification" /sc ONLOGON /tr "'C:\Users\Admin\NetHood\MusNotification.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4768
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "MusNotificationM" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\NetHood\MusNotification.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 13 /tr "'C:\Program Files\Mozilla Firefox\gmp-clearkey\0.1\upfc.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1376
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfc" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\gmp-clearkey\0.1\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:396
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "upfcu" /sc MINUTE /mo 7 /tr "'C:\Program Files\Mozilla Firefox\gmp-clearkey\0.1\upfc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1760
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Internet Explorer\images\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4532
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files (x86)\Internet Explorer\images\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:112
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Internet Explorer\images\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3460
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 8 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\Idle.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4196
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:64
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 12 /tr "'C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\Idle.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3332
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 9 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2852
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3624
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\unsecapp.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4240
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 7 /tr "'C:\Users\Admin\Recent\RuntimeBroker.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2148
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Users\Admin\Recent\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2356
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Recent\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1512
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 11 /tr "'C:\Program Files\Java\StartMenuExperienceHost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files\Java\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3484
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 14 /tr "'C:\Program Files\Java\StartMenuExperienceHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4800

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\Idle.exe

      Filesize

      1.0MB

      MD5

      5e45962bd393c13522e7c9311b6e86a0

      SHA1

      1ae02d2752979c4800ccd9c5a1c99c5a084211c8

      SHA256

      7b9ddd730758e941e2fb8284386135a2d507d424a7021490c9227d79d36e9f15

      SHA512

      20fa7439c5eb76b91fa999f3f49e1d690bb66ded1d9400b781c39ba6558108a6563f9ad42d94e9ca02f9d979c427169e349fdc120eb85228b243eb73086714b7

    • C:\Users\Admin\AppData\Local\Temp\NrvbwqsVHN.bat

      Filesize

      236B

      MD5

      ce5b80ceda083a2a49a548cade903fb3

      SHA1

      68b2a0458592175211a8ca7eb57aed5d63635596

      SHA256

      4cebc18aa9484b5a7b05a6342de9827f29d54999c8c100b6752c50b90ea1f1ea

      SHA512

      62bc42ed2e73f79659d5f3d073e71fac8927231e2a673c48c7f8d9340d41e6d3b3068fc1f6b1db9392c6448c0090f2a9e8ae38643eeb0f954cc03693fd6df28e

    • memory/4108-0-0x00007FFEAFD03000-0x00007FFEAFD05000-memory.dmp

      Filesize

      8KB

    • memory/4108-1-0x0000000000CB0000-0x0000000000DB8000-memory.dmp

      Filesize

      1.0MB

    • memory/4108-2-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

      Filesize

      10.8MB

    • memory/4108-3-0x0000000001690000-0x000000000169E000-memory.dmp

      Filesize

      56KB

    • memory/4108-4-0x00000000016B0000-0x00000000016BA000-memory.dmp

      Filesize

      40KB

    • memory/4108-5-0x00000000016C0000-0x00000000016CC000-memory.dmp

      Filesize

      48KB

    • memory/4108-6-0x0000000002F20000-0x0000000002F2C000-memory.dmp

      Filesize

      48KB

    • memory/4108-29-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

      Filesize

      10.8MB