Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    22-11-2024 07:42

General

  • Target

    adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca.exe

  • Size

    1.9MB

  • MD5

    f93786885d2a064e5bfaa873d5adce3a

  • SHA1

    2f5607b932aca74701dd9aa0a581d7e6971df23f

  • SHA256

    adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca

  • SHA512

    61d28dc832fd3ec100841323e1cdb3da166c0673bfbb20ab2ccff25d0e90b407b05fe8f59eb0ce93c0fdf130aa2b12e0cc7ce2158b4b2a22f51d7701550782c9

  • SSDEEP

    49152:HN54VMGOhLmPkO4koPyVu5eAEfgPwNqsrui:v0vEf8u5eAmFZ

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 10 IoCs

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

  • DCRat payload 6 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 2 IoCs
  • Checks BIOS information in registry 2 TTPs 4 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Executes dropped EXE 1 IoCs
  • Identifies Wine through registry keys 2 TTPs 2 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 10 IoCs
  • Drops file in System32 directory 10 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Drops file in Program Files directory 2 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 4 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 10 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 16 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\adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca.exe
    "C:\Users\Admin\AppData\Local\Temp\adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1556
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\CXqqls3JSr.bat"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1844
      • C:\Windows\SysWOW64\w32tm.exe
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:784
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          4⤵
            PID:2660
        • C:\Windows\SysWOW64\wininit\taskhost.exe
          "C:\Windows\System32\wininit\taskhost.exe"
          3⤵
          • Identifies VirtualBox via ACPI registry values (likely anti-VM)
          • Checks BIOS information in registry
          • Executes dropped EXE
          • Identifies Wine through registry keys
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1736
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00A1-0409-0000-0000000FF1CE}-C\OSPPSVC.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2276
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\480d7142-91a3-11ef-b9f6-6e5a89f5a3c7\wininit.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2444
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\cmstp\sppsvc.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2804
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Documents and Settings\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2744
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\SysWOW64\migwiz\csrss.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2128
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\System32\wininit\taskhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2628
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2240
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\TCPSVCS\winlogon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1096
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\replace\spoolsv.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1340
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca" /sc ONLOGON /tr "'C:\Windows\Globalization\MCT\MCT-US\Link\adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2088

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\CXqqls3JSr.bat

      Filesize

      204B

      MD5

      42a5dbcc189c749c10cce2826b628163

      SHA1

      c3084d37f178f28ac491330b6a668b0d16747370

      SHA256

      97f4880f7f8736bc683dc6314573e4cfd3753f7d60a7cfae8876acdcd81f5b0a

      SHA512

      c41c3e3802a097b1f820a3a28da22961c641326ea42d3ce0f8d17f8ff4a7da31e8816ba8787f85daaef25d13b5ce162d2f4998fe961dbfba07df65bb6f09ac4e

    • C:\Windows\SysWOW64\migwiz\csrss.exe

      Filesize

      1.9MB

      MD5

      f93786885d2a064e5bfaa873d5adce3a

      SHA1

      2f5607b932aca74701dd9aa0a581d7e6971df23f

      SHA256

      adebff4c705c3b2f33f51042bdba1094f29d33f24b456ddb1465be3f7f80b3ca

      SHA512

      61d28dc832fd3ec100841323e1cdb3da166c0673bfbb20ab2ccff25d0e90b407b05fe8f59eb0ce93c0fdf130aa2b12e0cc7ce2158b4b2a22f51d7701550782c9

    • memory/1556-0-0x0000000000CE0000-0x00000000011DA000-memory.dmp

      Filesize

      5.0MB

    • memory/1556-1-0x0000000000CE0000-0x00000000011DA000-memory.dmp

      Filesize

      5.0MB

    • memory/1556-2-0x0000000000CE0000-0x00000000011DA000-memory.dmp

      Filesize

      5.0MB

    • memory/1556-29-0x0000000000CE0000-0x00000000011DA000-memory.dmp

      Filesize

      5.0MB

    • memory/1736-37-0x0000000000A50000-0x0000000000F4A000-memory.dmp

      Filesize

      5.0MB

    • memory/1736-35-0x0000000000A50000-0x0000000000F4A000-memory.dmp

      Filesize

      5.0MB

    • memory/1736-36-0x0000000000A50000-0x0000000000F4A000-memory.dmp

      Filesize

      5.0MB

    • memory/1736-38-0x0000000000510000-0x000000000051C000-memory.dmp

      Filesize

      48KB

    • memory/1736-39-0x0000000000530000-0x000000000053E000-memory.dmp

      Filesize

      56KB

    • memory/1736-40-0x00000000005B0000-0x00000000005BA000-memory.dmp

      Filesize

      40KB

    • memory/1736-41-0x00000000005A0000-0x00000000005A8000-memory.dmp

      Filesize

      32KB

    • memory/1736-43-0x0000000000A50000-0x0000000000F4A000-memory.dmp

      Filesize

      5.0MB

    • memory/1844-33-0x0000000002440000-0x000000000293A000-memory.dmp

      Filesize

      5.0MB