Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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 5 IoCs
  • Isrstealer family
  • Detected Nirsoft tools 4 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft WebBrowserPassView 4 IoCs

    Password recovery tool for various web browsers

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 6 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 11 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 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 62 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:4024
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1552
      • C:\Users\Admin\AppData\Local\Temp\UPYUP.exe
        "C:\Users\Admin\AppData\Local\Temp\UPYUP.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:3512
        • C:\Users\Admin\AppData\Local\Temp\UPYUP.exe
          "C:\Users\Admin\AppData\Local\Temp\UPYUP.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1724
          • C:\Users\Admin\AppData\Local\Temp\UPYUP.exe
            "C:\Users\Admin\AppData\Local\Temp\UPYUP.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:1964
    • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe
      "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7b6e32355587a65ca9d434152ebd7ef4.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2020
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\LMJRD.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1820
        • 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:5052
      • 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:4460
        • 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:4680
        • 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:4040

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        LMJRD.txt

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

        UPYUP.exe

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

        intelgfx.exe

        • Path C:\Users\Admin\AppData\Roaming\system32\intelgfx.exe
        • Size 408KB
        • SHA256 a45fbfe56b23df85b263bd686fbe359e9c5acd15c238e78e9fbb63b313507e10
        • MD5 SHA1 SHA512 SSDEEP

        memory/1552-14-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1552-6-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1552-13-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1552-49-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1552-8-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1724-34-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1724-42-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1724-32-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1724-35-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1724-36-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1964-44-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1964-37-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1964-43-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/1964-48-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/2020-7-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/2020-10-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/2020-12-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/2020-83-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/4024-2-0x0000000002B90000-0x0000000002B91000-memory.dmp

        memory/4024-3-0x0000000002D80000-0x0000000002D81000-memory.dmp

        memory/4040-91-0x0000000000400000-0x000000000040B000-memory.dmp

        memory/4680-90-0x0000000000400000-0x0000000000459000-memory.dmp