Analysis

  • max time kernel
    149s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    04/01/2025, 19:41

General

  • Target
    JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe
  • Size 408KB
  • Sample250104-yd3m1awkdj
  • SHA256 d8f21b5f2faba217f98cd3e77340f21ae8e13f4598bae5095d578c320a0b9b37
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • ISR Stealer

    ISR Stealer is a modified version of Hackhound Stealer written in visual basic.

  • ISR Stealer payload 4 IoCs
  • Isrstealer family
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 12 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 6 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2328
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2568
      • C:\Users\Admin\AppData\Local\Temp\YTEYT.exe
        "C:\Users\Admin\AppData\Local\Temp\YTEYT.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2520
        • C:\Users\Admin\AppData\Local\Temp\YTEYT.exe
          "C:\Users\Admin\AppData\Local\Temp\YTEYT.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1412
          • C:\Users\Admin\AppData\Local\Temp\YTEYT.exe
            "C:\Users\Admin\AppData\Local\Temp\YTEYT.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:2872
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:876
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\HWXUD.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2652
        • C:\Windows\SysWOW64\reg.exe
          REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "invidiadriver" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe" /f
          4⤵
          • Adds Run key to start application
          • System Location Discovery: System Language Discovery
          PID:2436
      • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
        "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:848
        • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
          "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of SetWindowsHookEx
          PID:2232
        • C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
          "C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:2512

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        HWXUD.bat

        • Path C:\Users\Admin\AppData\Local\Temp\HWXUD.bat
        • Size 152B
        • SHA256 2d6e24c71a3081416896765d09901744dbd541553af2d831f2a17f6f38ac4dec
        • MD5 SHA1 SHA512

        YTEYT.exe

        • Path \Users\Admin\AppData\Local\Temp\YTEYT.exe
        • Size 320KB
        • SHA256 8ca1bd039407381c33fb7ab570b6e95b0ce64b0d5ef64a1968f9b55647cc1911
        • MD5 SHA1 SHA512 SSDEEP

        intelgfx.exe

        • Path \Users\Admin\AppData\Roaming\system32\intelgfx.exe
        • Size 408KB
        • SHA256 6e70290a314cd02265d4a5c09cc54fe8ddefaafc78c4390130811dd8ca49bbdb
        • MD5 SHA1 SHA512 SSDEEP

        memory/876-379-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/876-805-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/2232-810-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/2328-2-0x0000000000230000-0x0000000000231000-memory.dmp

        memory/2512-819-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/2568-378-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/2568-818-0x0000000000400000-0x0000000000459000-memory.dmp