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Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/11/2022, 04:32

General

  • Target

    378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe

  • Size

    357KB

  • MD5

    77f0f5817a7664514c609e0a892e3183

  • SHA1

    377ddd9ce3fac1e075352c7a7ff49189c34fdb4e

  • SHA256

    378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef

  • SHA512

    fdf2d80d9d4b1507dda4d5e6fe2cbb810879e8f848b4d7be5d5a2ba1bcf0044c2f3e35a484bd70c76709d5aab81a18491c6fdd365fd02e316c1f8b1b994bffcf

  • SSDEEP

    6144:sqW+i3FV8tqehoyDZD12PRX9KHjvDbrx6TgIEy0Vi3a/D7GXj2C2SY+XTVyHh2:sD+i3DTKoy725M7dMgIq3Sl2SY+XMB

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 6 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 2 IoCs
  • UPX packed file 8 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs net.exe
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe
    "C:\Users\Admin\AppData\Local\Temp\378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4300
    • C:\Windows\SysWOW64\net.exe
      "C:\Windows\System32\net.exe" stop sharedaccess
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5040
      • C:\Windows\SysWOW64\net1.exe
        C:\Windows\system32\net1 stop sharedaccess
        3⤵
          PID:2060
      • C:\Users\Admin\AppData\Local\Temp\378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe
        "C:\Users\Admin\AppData\Local\Temp\378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1592
        • C:\Users\Admin\AppData\Local\Temp\378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\eppeKo2oor.ini"
          3⤵
            PID:332
          • C:\Users\Admin\AppData\Local\Temp\378894a8b085cb5091a4028cb80cab7a9c939e2efc208c38c13106ca49847bef.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\zgJ8jDclVI.ini"
            3⤵
            • Accesses Microsoft Outlook accounts
            PID:4940

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\eppeKo2oor.ini

        Filesize

        5B

        MD5

        d1ea279fb5559c020a1b4137dc4de237

        SHA1

        db6f8988af46b56216a6f0daf95ab8c9bdb57400

        SHA256

        fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

        SHA512

        720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

      • memory/332-143-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/332-148-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/332-147-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/332-145-0x0000000000400000-0x0000000000453000-memory.dmp

        Filesize

        332KB

      • memory/1592-146-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/1592-139-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/1592-137-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/1592-156-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/1592-157-0x0000000000400000-0x0000000000442000-memory.dmp

        Filesize

        264KB

      • memory/4940-151-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4940-153-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4940-154-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB

      • memory/4940-155-0x0000000000400000-0x000000000041F000-memory.dmp

        Filesize

        124KB