Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/04/2024, 08:42

General

  • Target
    f31d9eae28788bd1626e87d3ee74bc16_JaffaCakes118.dll
  • Size 472KB
  • Sample240416-kme2eafe2y
  • SHA256 b754fe835c863c379a36fdd42ee84564f7b8a5ba3a7d286d1fa80a9e0f2d2161
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 4 IoCs
  • Loads dropped DLL 31 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Writes to the Master Boot Record (MBR) 1 TTPs 3 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in System32 directory 19 IoCs
  • Drops file in Windows directory 13 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 47 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\f31d9eae28788bd1626e87d3ee74bc16_JaffaCakes118.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3404
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\f31d9eae28788bd1626e87d3ee74bc16_JaffaCakes118.dll,#1
      2⤵
      • Adds Run key to start application
      • Writes to the Master Boot Record (MBR)
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Suspicious use of WriteProcessMemory
      PID:2332
      • C:\Windows\SysWOW64\regsvr32.exe
        C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/a1l8.dll"
        3⤵
          PID:4868
        • C:\Windows\SysWOW64\regsvr32.exe
          C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/b4cb.dll"
          3⤵
            PID:3132
          • C:\Windows\SysWOW64\regsvr32.exe
            C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/4f3r.dll"
            3⤵
              PID:1484
            • C:\Windows\SysWOW64\regsvr32.exe
              C:\Windows\system32\regsvr32.exe /u /s "C:\Windows\system32/b34o.dll"
              3⤵
                PID:3892
              • C:\Windows\SysWOW64\regsvr32.exe
                C:\Windows\system32\regsvr32.exe /s "C:\Windows\system32/b34o.dll"
                3⤵
                • Loads dropped DLL
                • Installs/modifies Browser Helper Object
                • Modifies registry class
                PID:5108
              • C:\Windows\SysWOW64\341d.exe
                C:\Windows\system32/341d.exe -i
                3⤵
                • Executes dropped EXE
                PID:3492
              • C:\Windows\SysWOW64\341d.exe
                C:\Windows\system32/341d.exe -s
                3⤵
                • Executes dropped EXE
                PID:412
              • C:\Users\Admin\AppData\Local\Temp\h8nil4o8\mtv.exe
                C:\Users\Admin\AppData\Local\Temp\h8nil4o8\mtv.exe
                3⤵
                • Executes dropped EXE
                • Drops file in System32 directory
                • Suspicious use of SetWindowsHookEx
                PID:4360
              • C:\Windows\SysWOW64\rundll32.exe
                C:\Windows\system32\rundll32 C:\Windows\system32/341e.dll, Always
                3⤵
                • Loads dropped DLL
                PID:1620
          • C:\Windows\SysWOW64\341d.exe
            C:\Windows\SysWOW64\341d.exe
            1⤵
            • Drops file in Drivers directory
            • Executes dropped EXE
            • Loads dropped DLL
            • Writes to the Master Boot Record (MBR)
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of WriteProcessMemory
            PID:4312
            • C:\Windows\SysWOW64\rundll32.exe
              C:\Windows\system32\rundll32 C:\Windows\system32/341e.dll,Always
              2⤵
              • Loads dropped DLL
              • Writes to the Master Boot Record (MBR)
              • Drops file in System32 directory
              PID:212
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1036 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
            1⤵
              PID:2328

            Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

                  tmp.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\d0q0\tmp.exe
                  • Size 136KB
                  • SHA256 31e4add1ab6de029da39b66c15a9e563d221a3df00d8660aff6076b3a0c0a964
                  • MD5 SHA1 SHA512 SSDEEP

                  b.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\b.dll
                  • Size 144KB
                  • SHA256 2412fd5da1a629374364055fda56b9563ff7e3e65a73b2dedd9296e096bad9e2
                  • MD5 SHA1 SHA512 SSDEEP

                  mtv.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\mtv.exe
                  • Size 76KB
                  • SHA256 39aaa3614f94db5f2722926dddc6aa1c9068e258e1716799cd1ff98bea449ea9
                  • MD5 SHA1 SHA512 SSDEEP

                  p.dll

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\p.dll
                  • Size 518KB
                  • SHA256 c4ff000d8264ea2ef09ac45b79011ccc8a66f3c6c5f867ccea647b31736234b6
                  • MD5 SHA1 SHA512 SSDEEP

                  s.exe

                  • Path C:\Users\Admin\AppData\Local\Temp\h8nil4o8\s.exe
                  • Size 224KB
                  • SHA256 17764e4fc235af8aec7a3133e902c02c89f20d2594ac1ce67de3bc81177bd799
                  • MD5 SHA1 SHA512 SSDEEP