Analysis

  • max time kernel
    93s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-12-2024 08:46

General

  • Target

    d19220e738ca3bae030183e83544aebc_JaffaCakes118.exe

  • Size

    2.3MB

  • MD5

    d19220e738ca3bae030183e83544aebc

  • SHA1

    8f6b9a18e180ec012be9d12ddf8c2ab79e1fe990

  • SHA256

    6956fe608e1cbcac4888a11b3a9815451289a38bb3fdb82c29f8f8ad593b209d

  • SHA512

    c493831b0baf1f5d96921ec21ddef85b0e9e45e6ef7ebb5f82fc8da081d3fa6ee6d9fd3efec47be603ff3ae474f9fdabbff1ae530155e715eab588c09f46e980

  • SSDEEP

    49152:PWkv2p8AKHzTc8b6ZgeZ50xGktV/Cg1beUU++JKpqmPfgwvc+XXgGALr28:n2pJ2zIjZg0NkLqk+XSfdvzXXGG8

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 8 IoCs

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

  • DCRat payload 8 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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.

  • Adds Run key to start application 2 TTPs 8 IoCs
  • Drops file in System32 directory 11 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 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 5 IoCs

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

  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 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\d19220e738ca3bae030183e83544aebc_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\d19220e738ca3bae030183e83544aebc_JaffaCakes118.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks computer location settings
    • Identifies Wine through registry keys
    • Adds Run key to start application
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4672
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\oGFhIBVZSj.bat"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:684
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
        • System Location Discovery: System Language Discovery
        PID:4256
      • 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:2564
        • C:\Windows\system32\w32tm.exe
          w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
          4⤵
            PID:3000
        • C:\Windows\security\EDP\Logs\sysmon.exe
          "C:\Windows\security\EDP\Logs\sysmon.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:4568
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\qcap\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4796
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\mf\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2196
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\d3d10core\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3256
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\security\EDP\Logs\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3808
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\f3ahvoas\SppExtComObj.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2324
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\Windows.Storage.Search\dllhost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4564
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3988
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Documents and Settings\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:540

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

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

      Filesize

      215B

      MD5

      c0d81d3dfa4f51e5cb001c3477b94c97

      SHA1

      6fde156843a17de6b82ded00db42943032da1415

      SHA256

      5484dade8c8a754ea26dd882f22776ed0e99f1c3a62a4ba66e0854a9e9c5a767

      SHA512

      103446277c558f9a9aac9a2b9e133453fd546b047e9e3619f45f63bc01666add2567d31ce2e2fa5825ecadbe45cf8ca28eb73d805bbac97cf8acb538f579144e

    • C:\Windows\SysWOW64\f3ahvoas\SppExtComObj.exe

      Filesize

      2.3MB

      MD5

      d19220e738ca3bae030183e83544aebc

      SHA1

      8f6b9a18e180ec012be9d12ddf8c2ab79e1fe990

      SHA256

      6956fe608e1cbcac4888a11b3a9815451289a38bb3fdb82c29f8f8ad593b209d

      SHA512

      c493831b0baf1f5d96921ec21ddef85b0e9e45e6ef7ebb5f82fc8da081d3fa6ee6d9fd3efec47be603ff3ae474f9fdabbff1ae530155e715eab588c09f46e980

    • memory/4568-34-0x00000000009F0000-0x0000000000F76000-memory.dmp

      Filesize

      5.5MB

    • memory/4568-48-0x00000000009F0000-0x0000000000F76000-memory.dmp

      Filesize

      5.5MB

    • memory/4568-40-0x00000000009F0000-0x0000000000F76000-memory.dmp

      Filesize

      5.5MB

    • memory/4568-37-0x00000000059F0000-0x00000000059FA000-memory.dmp

      Filesize

      40KB

    • memory/4568-38-0x00000000059B0000-0x00000000059BC000-memory.dmp

      Filesize

      48KB

    • memory/4568-36-0x0000000003950000-0x000000000395C000-memory.dmp

      Filesize

      48KB

    • memory/4568-35-0x00000000009F0000-0x0000000000F76000-memory.dmp

      Filesize

      5.5MB

    • memory/4568-33-0x00000000009F0000-0x0000000000F76000-memory.dmp

      Filesize

      5.5MB

    • memory/4672-4-0x0000000005D70000-0x0000000005E0C000-memory.dmp

      Filesize

      624KB

    • memory/4672-29-0x0000000000E80000-0x0000000001406000-memory.dmp

      Filesize

      5.5MB

    • memory/4672-7-0x0000000005F80000-0x0000000005FE6000-memory.dmp

      Filesize

      408KB

    • memory/4672-0-0x0000000000E80000-0x0000000001406000-memory.dmp

      Filesize

      5.5MB

    • memory/4672-3-0x0000000006270000-0x0000000006814000-memory.dmp

      Filesize

      5.6MB

    • memory/4672-2-0x0000000000E80000-0x0000000001406000-memory.dmp

      Filesize

      5.5MB

    • memory/4672-1-0x0000000000E80000-0x0000000001406000-memory.dmp

      Filesize

      5.5MB