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
    26-11-2024 03:19

General

  • Target

    c0d51cad38cd578ac0f62737185d0e15184843b8a118bb978d11d9e86998eef3.exe

  • Size

    1.1MB

  • MD5

    11da048860021b6c22e171032e48b023

  • SHA1

    b3b636a8bd17223454b4522fdbdb4863e0c4a565

  • SHA256

    c0d51cad38cd578ac0f62737185d0e15184843b8a118bb978d11d9e86998eef3

  • SHA512

    09b8bc3f1fa034d28a14e0fc5e44722ee84cfd9b32dc7887674100d967b3c9232d7ae42156c8d45050ea781ba87a3ee29a54bfc04bef98c6e5f6d9123444509f

  • SSDEEP

    24576:U2G/nvxW3Ww0tpI7rd5XFM2cxARnZ0S/J1:UbA30pILXZjv

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 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 2 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files directory 7 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 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\c0d51cad38cd578ac0f62737185d0e15184843b8a118bb978d11d9e86998eef3.exe
    "C:\Users\Admin\AppData\Local\Temp\c0d51cad38cd578ac0f62737185d0e15184843b8a118bb978d11d9e86998eef3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\blockrefSessionBrokerDll\5sVJrvWE.vbe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2344
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\blockrefSessionBrokerDll\jNiINMcACfpGfudqTH4IxZpVWTbF.bat" "
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2268
        • C:\blockrefSessionBrokerDll\chainMonitor.exe
          "C:\blockrefSessionBrokerDll\chainMonitor.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2768
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\J965cvD3ui.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2176
            • C:\Windows\system32\w32tm.exe
              w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
              6⤵
                PID:1052
              • C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\chainMonitor.exe
                "C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\chainMonitor.exe"
                6⤵
                • Executes dropped EXE
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:1400
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\10\lsm.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2656
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\10\lsm.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 "lsml" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Microsoft Analysis Services\AS OLEDB\10\lsm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2792
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\services.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2904
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default User\services.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2640
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "servicess" /sc MINUTE /mo 9 /tr "'C:\Users\Default User\services.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 "WMIADAPW" /sc MINUTE /mo 13 /tr "'C:\blockrefSessionBrokerDll\WMIADAP.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2300
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\blockrefSessionBrokerDll\WMIADAP.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1348
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 14 /tr "'C:\blockrefSessionBrokerDll\WMIADAP.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1088
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 14 /tr "'C:\MSOCache\All Users\OSPPSVC.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1724
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\MSOCache\All Users\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1528
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVCO" /sc MINUTE /mo 13 /tr "'C:\MSOCache\All Users\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2608
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\blockrefSessionBrokerDll\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1472
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\blockrefSessionBrokerDll\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2000
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\blockrefSessionBrokerDll\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1840
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\dllhost.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1200
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Admin\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1224
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Users\Admin\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1536
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 6 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\cmd.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:316
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\cmd.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1544
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\cmd.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1764
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Program Files\Mozilla Firefox\defaults\pref\System.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2720
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\defaults\pref\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2992
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Program Files\Mozilla Firefox\defaults\pref\System.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2132
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "chainMonitorc" /sc MINUTE /mo 7 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\chainMonitor.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2196
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "chainMonitor" /sc ONLOGON /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\chainMonitor.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2996
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "chainMonitorc" /sc MINUTE /mo 13 /tr "'C:\Recovery\1f5748e2-69f6-11ef-b486-62cb582c238c\chainMonitor.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2008
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 8 /tr "'C:\Windows\ja-JP\WMIADAP.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:444
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Windows\ja-JP\WMIADAP.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2288
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 11 /tr "'C:\Windows\ja-JP\WMIADAP.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2932
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Google\CrashReports\WMIADAP.exe'" /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:684
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\CrashReports\WMIADAP.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1292
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 6 /tr "'C:\Program Files (x86)\Google\CrashReports\WMIADAP.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1040

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\J965cvD3ui.bat

      Filesize

      230B

      MD5

      4fc3b9a195296989d98309f5b222e0b6

      SHA1

      f82af0dac7a5390384f229c14b70ccc6c42eaee3

      SHA256

      5172b6f52de45450da4d3fcfc9775eb56d1690e21dae14ba47a4dd5b980bf879

      SHA512

      23fead1b7727b454fb94a4d875e52da6ebf23f4f332490933b2b59c0304cb0b1c0382f68a7df1df2793c9b975e7dc61ca0b0a46fa5182bfaea987807f4cc2a58

    • C:\blockrefSessionBrokerDll\5sVJrvWE.vbe

      Filesize

      229B

      MD5

      7533c94864b144aa157dbd00f03e9871

      SHA1

      807bad6d8cb143e2fac7ec32a6e07a4016af308d

      SHA256

      1dceabad90f9b4e74e59d62eebbc86662708d2c28761074e8b4fd73aa73f60aa

      SHA512

      3d536e931dadb7d6efc079fc9ff336ee4f2c7a291fcd1df7139c565e74d73e4c12745b886dbb746f060cd46c36cb3d774bc2b9f3a5407a737cb94ac44ed70f8c

    • C:\blockrefSessionBrokerDll\jNiINMcACfpGfudqTH4IxZpVWTbF.bat

      Filesize

      46B

      MD5

      6f0b3744c91bc8641c6cef0ae9be66b5

      SHA1

      5e45aef1422d839f27a9e73b395c58eeab7ae476

      SHA256

      6442de1cdf0bf9500de8b74c00506a7d84193b3780f9242f55497335526aad5c

      SHA512

      97089e966a4969391aa2fa10d0693c103a16eea70bfbc01481ecda46ae6953e3a25abf3034500e275cc60e0e8de6f95435b2ba2c9df2cda5bf58685af4cba8e0

    • \blockrefSessionBrokerDll\chainMonitor.exe

      Filesize

      828KB

      MD5

      f6b809fa6bd0e72435fab78e9744ccd7

      SHA1

      52749158484cf20a6511fcd36fda0e8100ebe316

      SHA256

      af8a81f4387ba5ebe96f5111d56b65585c194602e5bd147997eab1b6e28ae7b2

      SHA512

      12c63edcd1f347b519da80c814fcf3640294fdbd2482a7be4da4d20f8f5d785d2e97f784df39ad28b317d2db3cc43d904c5584fc9eea2c1f1df01b999362adf9

    • memory/1400-43-0x00000000009F0000-0x0000000000AC6000-memory.dmp

      Filesize

      856KB

    • memory/2768-13-0x0000000000980000-0x0000000000A56000-memory.dmp

      Filesize

      856KB