Analysis

  • max time kernel
    80s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220414-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/07/2022, 19:35

General

  • Target
    4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe
  • Size 1.0MB
  • Sample220719-yarrbsaec2
  • SHA256 4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 3 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 2 IoCs
  • UPX packed file 13 IoCs

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

  • 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
  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 27 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe
    "C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3872
    • C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe
      "C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe"
      2⤵
        PID:4020
      • C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe
        "C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4424
        • C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\FTXe86435y.ini"
          3⤵
            PID:3540
          • C:\Users\Admin\AppData\Local\Temp\4fded95fb71c1918c15f2ec21cedad80698fa1bd8e34c01e2f23c90237050226.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\qBbz3bV4hH.ini"
            3⤵
            • Accesses Microsoft Outlook accounts
            PID:4252

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            FTXe86435y.ini

            • Path C:\Users\Admin\AppData\Local\Temp\FTXe86435y.ini
            • Size 5B
            • SHA256 fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba
            • MD5 SHA1 SHA512

            memory/3540-146-0x0000000000400000-0x0000000000453000-memory.dmp

            memory/3540-145-0x0000000000400000-0x0000000000453000-memory.dmp

            memory/3540-144-0x0000000000400000-0x0000000000453000-memory.dmp

            memory/3540-142-0x0000000000400000-0x0000000000453000-memory.dmp

            memory/3872-137-0x0000000074690000-0x0000000074C41000-memory.dmp

            memory/3872-130-0x0000000074690000-0x0000000074C41000-memory.dmp

            memory/4252-152-0x0000000000400000-0x000000000041F000-memory.dmp

            memory/4252-149-0x0000000000400000-0x000000000041F000-memory.dmp

            memory/4252-151-0x0000000000400000-0x000000000041F000-memory.dmp

            memory/4252-153-0x0000000000400000-0x000000000041F000-memory.dmp

            memory/4424-133-0x0000000000400000-0x0000000000448000-memory.dmp

            memory/4424-135-0x0000000000400000-0x0000000000448000-memory.dmp

            memory/4424-138-0x0000000000400000-0x0000000000448000-memory.dmp

            memory/4424-154-0x0000000000400000-0x0000000000448000-memory.dmp

            memory/4424-155-0x0000000000400000-0x0000000000448000-memory.dmp