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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/12/2024, 07:29

General

  • Target

    c697f3001198246fe1a1d2494a0ff2ee_JaffaCakes118.exe

  • Size

    1.4MB

  • MD5

    c697f3001198246fe1a1d2494a0ff2ee

  • SHA1

    0505a546298ff2a17d510387a1060ab3f44112e7

  • SHA256

    250196616e509add44f0e1dec8e4e1b515ef52df9a6e3f569ee0fe7c80a13914

  • SHA512

    24b7723c24a8687ad152dacad7b0ea52dc8500c1f6a727eb26d4f8015ef91f56d3e8d1cc5d3d0f11ac9101934ccb814d620f0806941f22c809dbad6dee4cb042

  • SSDEEP

    24576:u2G/nvxW3WieCjbsHd2vNn2LRLpapqDTmRf9KrFnbkW9zdAZeSGhl6C+4Q:ubA3jnvNn2LIqH4S/g9GhwVt

Malware Config

Signatures

  • DcRat 5 IoCs

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

  • Dcrat family
  • Process spawned unexpected child process 4 IoCs

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

  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Disables Task Manager via registry modification
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 3 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.

  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 4 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 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\c697f3001198246fe1a1d2494a0ff2ee_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\c697f3001198246fe1a1d2494a0ff2ee_JaffaCakes118.exe"
    1⤵
    • DcRat
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:3692
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\fontCrtmonitor\nA8GErCea25MZivjqg2s92X.vbe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2216
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\fontCrtmonitor\l0noRYfNtuMwZAdFzsP7Iup4EtFybJ.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3848
        • C:\fontCrtmonitor\fontCrtmonitordhcpcommonsvc.exe
          "C:\fontCrtmonitor\fontCrtmonitordhcpcommonsvc.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Adds Run key to start application
          • Drops file in System32 directory
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4160
          • C:\Documents and Settings\Registry.exe
            "C:\Documents and Settings\Registry.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1468
        • C:\Windows\SysWOW64\reg.exe
          reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
          4⤵
          • System Location Discovery: System Language Discovery
          • Modifies registry key
          PID:3956
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files\Mozilla Firefox\defaults\pref\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3840
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Documents and Settings\Registry.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3056
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\oemlicense\fontdrvhost.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:3372
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\RuntimeBroker.exe'" /rl HIGHEST /f
    1⤵
    • DcRat
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2588

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\fontCrtmonitor\fontCrtmonitordhcpcommonsvc.exe

    Filesize

    1.1MB

    MD5

    28886e53db2a45715e41eae56995d6f1

    SHA1

    bc4e39e76862b679008cf09d5f1dfb699f3c2221

    SHA256

    3016236a2f8762247bcfc3155c3dea0f7e95dd4a169d992f8b513ceb854b3fd6

    SHA512

    ee054887be745a247f9686552b685859a0f4bf5d1596242796a6ae4e8a34797f98fb3334ef04d59d4d8e2bab90292861d305984f90b161206efbf358c4bbc10f

  • C:\fontCrtmonitor\l0noRYfNtuMwZAdFzsP7Iup4EtFybJ.bat

    Filesize

    163B

    MD5

    1cf2705e98452a852a6de7b249a90c87

    SHA1

    a471792f55ade29290eec36a725b1220e15146ba

    SHA256

    8bafb2cdfc3b8cf0118bd973185e077ba2626b37a2f64c9c79e5a7bf2073bc18

    SHA512

    115813a1766dcbdfc6e690e2f242a0e0ea7d8e801e115e64fc51145c4f56aa12d06a2cb431f74851e0182299ada3de615c2fc64462aecb2ba998cbd2775e2a01

  • C:\fontCrtmonitor\nA8GErCea25MZivjqg2s92X.vbe

    Filesize

    221B

    MD5

    6ffd9e92b08389f74f46cbfa8aaabddf

    SHA1

    8c941128ea70205935f21ddc70b8246d1787675c

    SHA256

    1ea84b3dbb654661f188f40ee3ca42d977bc1dab091fc1232a2ce012f368d62e

    SHA512

    7a384774985905b82964a5f61e12f2d4780d15bbc2b847a987e833c69569fc443e850c2f41e5e89f2bf3bfe2c8de8ad8ed4001b431f975a8755ebd3b83adda79

  • memory/1468-34-0x000000001BE30000-0x000000001BF32000-memory.dmp

    Filesize

    1.0MB

  • memory/1468-39-0x000000001BE30000-0x000000001BF32000-memory.dmp

    Filesize

    1.0MB

  • memory/4160-12-0x00007FF868113000-0x00007FF868115000-memory.dmp

    Filesize

    8KB

  • memory/4160-13-0x0000000000750000-0x000000000087A000-memory.dmp

    Filesize

    1.2MB