Analysis

  • max time kernel
    137s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-07-2024 18:24

General

  • Target

    7533ed2a304c4822335ace29d3fbfd08_JaffaCakes118.exe

  • Size

    598KB

  • MD5

    7533ed2a304c4822335ace29d3fbfd08

  • SHA1

    870ad473904ed8466d2d53642ed42f8bad1afc76

  • SHA256

    1624432ef21c3f80e457d520420c001b415eb8fecff45bbd7cb8960bd6b995c9

  • SHA512

    6172d9811c054d881134911bb46d1c3c8d5b736b2a52d963c328806f65ea67bd449b3618ea6bda41e91dcb3d9de7f7946ac58756066351fb60b0f0c2570e139f

  • SSDEEP

    12288:HP+l1iJUOtVAzoHnNIHMiViofc5lWRxDkpa1KeJa+7H1QnfO9W:voiaAKkKHMiV45lWfkpar1

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 8 IoCs

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

  • DCRat payload 1 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 2 IoCs
  • Adds Run key to start application 2 TTPs 7 IoCs
  • Drops file in System32 directory 10 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 2 IoCs
  • 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 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 4 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\7533ed2a304c4822335ace29d3fbfd08_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\7533ed2a304c4822335ace29d3fbfd08_JaffaCakes118.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3576
    • C:\Users\Admin\AppData\Local\Temp\7533ed2a304c4822335ace29d3fbfd08_JaffaCakes118.exe
      "C:\Users\Admin\AppData\Local\Temp\7533ed2a304c4822335ace29d3fbfd08_JaffaCakes118.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4928
      • C:\Program Files\Windows Security\BrowserCore\en-US\sysmon.exe
        "C:\Program Files\Windows Security\BrowserCore\en-US\sysmon.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1652
        • C:\Program Files\Windows Security\BrowserCore\en-US\sysmon.exe
          "C:\Program Files\Windows Security\BrowserCore\en-US\sysmon.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:892
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 916
          4⤵
          • Program crash
          PID:3736
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3576 -s 916
      2⤵
      • Program crash
      PID:3012
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3576 -ip 3576
    1⤵
      PID:3484
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Program Files\Windows Security\BrowserCore\en-US\sysmon.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2868
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\cdp\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4652
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\ServiceWatcherSchedule\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3032
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\DictationManager\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3668
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\pcl\RuntimeBroker.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:1312
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\wevtutil\dwm.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:4432
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\OfficeClickToRun.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:2032
    • C:\Windows\system32\schtasks.exe
      schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\cdp\backgroundTaskHost.exe'" /rl HIGHEST /f
      1⤵
      • Process spawned unexpected child process
      • Scheduled Task/Job: Scheduled Task
      PID:3420
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 1652 -ip 1652
      1⤵
        PID:1760

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Windows\SysWOW64\pcl\RuntimeBroker.exe

        Filesize

        598KB

        MD5

        7533ed2a304c4822335ace29d3fbfd08

        SHA1

        870ad473904ed8466d2d53642ed42f8bad1afc76

        SHA256

        1624432ef21c3f80e457d520420c001b415eb8fecff45bbd7cb8960bd6b995c9

        SHA512

        6172d9811c054d881134911bb46d1c3c8d5b736b2a52d963c328806f65ea67bd449b3618ea6bda41e91dcb3d9de7f7946ac58756066351fb60b0f0c2570e139f

      • memory/892-46-0x0000000005890000-0x0000000005922000-memory.dmp

        Filesize

        584KB

      • memory/892-45-0x0000000005410000-0x000000000541C000-memory.dmp

        Filesize

        48KB

      • memory/892-44-0x00000000053C0000-0x00000000053C8000-memory.dmp

        Filesize

        32KB

      • memory/3576-5-0x0000000074F00000-0x00000000756B0000-memory.dmp

        Filesize

        7.7MB

      • memory/3576-4-0x0000000005F10000-0x00000000064B4000-memory.dmp

        Filesize

        5.6MB

      • memory/3576-7-0x00000000016B0000-0x00000000016B8000-memory.dmp

        Filesize

        32KB

      • memory/3576-11-0x0000000074F00000-0x00000000756B0000-memory.dmp

        Filesize

        7.7MB

      • memory/3576-0-0x0000000074F0E000-0x0000000074F0F000-memory.dmp

        Filesize

        4KB

      • memory/3576-3-0x00000000057C0000-0x000000000585C000-memory.dmp

        Filesize

        624KB

      • memory/3576-2-0x0000000005620000-0x00000000056B2000-memory.dmp

        Filesize

        584KB

      • memory/3576-1-0x0000000000BF0000-0x0000000000C8A000-memory.dmp

        Filesize

        616KB

      • memory/4928-6-0x0000000000400000-0x00000000004FA000-memory.dmp

        Filesize

        1000KB

      • memory/4928-9-0x0000000074F00000-0x00000000756B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4928-10-0x0000000074F00000-0x00000000756B0000-memory.dmp

        Filesize

        7.7MB

      • memory/4928-14-0x0000000005A60000-0x0000000005AC6000-memory.dmp

        Filesize

        408KB

      • memory/4928-40-0x0000000074F00000-0x00000000756B0000-memory.dmp

        Filesize

        7.7MB