Analysis

  • max time kernel
    156s
  • max time network
    173s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/10/2022, 20:03

General

  • Target
    dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe
  • Size 368KB
  • Sample221011-yspppaccgp
  • SHA256 dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9
  • 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 13 IoCs
  • NirSoft WebBrowserPassView 5 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 5 IoCs
  • Executes dropped EXE 9 IoCs
  • Modifies Installed Components in the registry 2 TTPs 2 IoCs
  • UPX packed file 7 IoCs

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

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • 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 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe
    "C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4828
    • C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe
      "C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe"
      2⤵
      • Checks computer location settings
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1292
      • C:\Users\Admin\AppData\Local\Temp\JEOJF.exe
        "C:\Users\Admin\AppData\Local\Temp\JEOJF.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1104
        • C:\Users\Admin\AppData\Local\Temp\JEOJF.exe
          "C:\Users\Admin\AppData\Local\Temp\JEOJF.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1572
          • C:\Users\Admin\AppData\Local\Temp\JEOJF.exe
            "C:\Users\Admin\AppData\Local\Temp\JEOJF.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
            5⤵
            • Executes dropped EXE
            PID:2760
    • C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe
      "C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe"
      2⤵
      • Checks computer location settings
      • Suspicious use of WriteProcessMemory
      PID:5088
      • C:\Users\Admin\AppData\Roaming\Host.exe
        "C:\Users\Admin\AppData\Roaming\Host.exe" C:\Users\Admin\AppData\Local\Temp\dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:316
        • C:\Users\Admin\AppData\Roaming\Host.exe
          "C:\Users\Admin\AppData\Roaming\Host.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2372
          • C:\Users\Admin\AppData\Local\Temp\WRCWS.exe
            "C:\Users\Admin\AppData\Local\Temp\WRCWS.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4956
            • C:\Users\Admin\AppData\Local\Temp\WRCWS.exe
              "C:\Users\Admin\AppData\Local\Temp\WRCWS.exe"
              6⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              PID:2560
              • C:\Users\Admin\AppData\Local\Temp\WRCWS.exe
                "C:\Users\Admin\AppData\Local\Temp\WRCWS.exe" /scomma C:\Users\Admin\AppData\Local\Temp\data.dmp
                7⤵
                • Executes dropped EXE
                PID:4188
        • C:\Users\Admin\AppData\Roaming\Host.exe
          "C:\Users\Admin\AppData\Roaming\Host.exe"
          4⤵
          • Executes dropped EXE
          • Modifies Installed Components in the registry
          • Adds Run key to start application
          PID:5020

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        JEOJF.exe

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

        JEOJF.exe

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

        JEOJF.exe

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

        JEOJF.exe

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

        WRCWS.exe

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

        WRCWS.exe

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

        WRCWS.exe

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

        WRCWS.exe

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

        data.dmp

        • Path C:\Users\Admin\AppData\Local\Temp\data.dmp
        • Size 54B
        • SHA256 0b6b62094048f0a069b4582f837afcb941db51340d0b16d578e8cbe8603a071e
        • MD5 SHA1 SHA512

        Host.exe

        • Path C:\Users\Admin\AppData\Roaming\Host.exe
        • Size 368KB
        • SHA256 dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9
        • MD5 SHA1 SHA512 SSDEEP

        Host.exe

        • Path C:\Users\Admin\AppData\Roaming\Host.exe
        • Size 368KB
        • SHA256 dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9
        • MD5 SHA1 SHA512 SSDEEP

        Host.exe

        • Path C:\Users\Admin\AppData\Roaming\Host.exe
        • Size 368KB
        • SHA256 dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9
        • MD5 SHA1 SHA512 SSDEEP

        Host.exe

        • Path C:\Users\Admin\AppData\Roaming\Host.exe
        • Size 368KB
        • SHA256 dc5225380dea039e3ce7b5156361fc68bc205cfdba8c9976f77192f4979f14d9
        • MD5 SHA1 SHA512 SSDEEP

        memory/1292-145-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1292-139-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1292-170-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1292-140-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1292-135-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/1572-167-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1572-163-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1572-161-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1572-160-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/1572-158-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/2372-184-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/2372-204-0x0000000000400000-0x0000000000459000-memory.dmp

        memory/2560-201-0x0000000000400000-0x0000000000441000-memory.dmp

        memory/2760-169-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/2760-164-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/2760-168-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/4188-203-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/4188-202-0x0000000000400000-0x0000000000454000-memory.dmp

        memory/5020-185-0x0000000000400000-0x0000000000414000-memory.dmp

        memory/5020-205-0x0000000000400000-0x0000000000414000-memory.dmp

        memory/5088-138-0x0000000000400000-0x0000000000414000-memory.dmp

        memory/5088-144-0x0000000000400000-0x0000000000414000-memory.dmp

        memory/5088-146-0x0000000000400000-0x0000000000414000-memory.dmp