Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/04/2024, 03:36

General

  • Target
    ec95e317ee82cbdbed9026afa7fd8201_JaffaCakes118.exe
  • Size 442KB
  • Sample240411-d6eresed2v
  • SHA256 29b982efda8b5d0ec829c14a83c5189be9e152e29e9b89b40a776468d18fa6c0
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 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.

  • Drops file in System32 directory 37 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 46 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of SetWindowsHookEx 24 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ec95e317ee82cbdbed9026afa7fd8201_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\ec95e317ee82cbdbed9026afa7fd8201_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3180
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:4136
      • C:\Windows\SysWOW64\bpk.exe
        C:\Windows\system32\bpk.exe
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Adds Run key to start application
        • Installs/modifies Browser Helper Object
        • Drops file in System32 directory
        • Modifies registry class
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        PID:4016

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        bpk.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bpk.exe
        • Size 428KB
        • SHA256 23d006840f55a4d2fe5f63d3c87d7dd237da3d722318aea62634659db3d75b5a
        • MD5 SHA1 SHA512 SSDEEP

        bpkhk.dll

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bpkhk.dll
        • Size 24KB
        • SHA256 6ca4f1cb4be4f9e096b69b02aef9ad47dd788b83f77669556cfe3ed8f698c849
        • MD5 SHA1 SHA512 SSDEEP

        bpkwb.dll

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\bpkwb.dll
        • Size 40KB
        • SHA256 cafdc7a384b07f4c8151699758361341a3ebaef6bd05f3af971007007a21c228
        • MD5 SHA1 SHA512 SSDEEP

        inst.dat

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\inst.dat
        • Size 996B
        • SHA256 d9e6356e19e4a40919a5f98c7049deba4c6d5133479890bac2ea0d4b20d237a7
        • MD5 SHA1 SHA512

        pk.bin

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\pk.bin
        • Size 4KB
        • SHA256 e22e8db574b0364aedd64c10977f8f3c8c142a9ee840f862af138f8b10c45941
        • MD5 SHA1 SHA512 SSDEEP

        rinst.exe

        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rinst.exe
        • Size 7KB
        • SHA256 6bba0b8d8bf03ba15828c53e72d83d766e44b3238b55ab75348d8ce93bfd0056
        • MD5 SHA1 SHA512 SSDEEP

        bpk.exe

        • Path C:\Windows\SysWOW64\bpk.exe
        • Size 428KB
        • SHA256 b966953b0a0e0bf648b1043b4e708445b52b020a0485921138bbf3be58d9995d
        • MD5 SHA1 SHA512 SSDEEP

        bpkhk.dll

        • Path C:\Windows\SysWOW64\bpkhk.dll
        • Size 24KB
        • SHA256 525414ffe5f797ebdd7de5620b75ff723de17bf8f399ffcd7ddec2d0b8a5dc4a
        • MD5 SHA1 SHA512 SSDEEP

        bpkwb.dll

        • Path C:\Windows\SysWOW64\bpkwb.dll
        • Size 40KB
        • SHA256 62e2948c3e3857e8304a657b7e7da30cdcb6842f71bd4c678a1734ebbf17198e
        • MD5 SHA1 SHA512 SSDEEP

        2024-04-11_03-37-52-240650265

        • Path C:\Windows\SysWOW64\dt\2024-04-11_03-37-52-240650265
        • Size 247KB
        • SHA256 96fe1c04454ca734937f31641f9f1ce0a29aada55cd52538f4807839088065e7
        • MD5 SHA1 SHA512 SSDEEP

        th_2024-04-11_03-37-52-240650265

        • Path C:\Windows\SysWOW64\dt\th_2024-04-11_03-37-52-240650265
        • Size 65KB
        • SHA256 711390ee18ab8627f57980324c5b9ef058edd48967c364679b554a26d7249897
        • MD5 SHA1 SHA512 SSDEEP

        pk.bin

        • Path C:\Windows\SysWOW64\pk.bin
        • Size 4KB
        • SHA256 05e3751682abfe7fc0010aeaa1a8bb9f19618b72d5e6b6db97c21298e917c146
        • MD5 SHA1 SHA512 SSDEEP

        temporary.bmp

        • Path C:\Windows\SysWOW64\temporary.bmp
        • Size 2.6MB
        • SHA256 2b4d1bb7c6e1a68aefb60e0cb49a2a2106bcd987337001d2f7654643c71a8d56
        • MD5 SHA1 SHA512 SSDEEP

        th_temp.bmp

        • Path C:\Windows\SysWOW64\th_temp.bmp
        • Size 341KB
        • SHA256 70a34ecde64ece1b76d55fa1192a47c698179a75f61475978bf1fad75921dc54
        • MD5 SHA1 SHA512 SSDEEP

        memory/3180-46-0x0000000000400000-0x0000000000412000-memory.dmp