Analysis

  • max time kernel
    49s
  • max time network
    114s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    04-10-2022 01:47

General

  • Target

    823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe

  • Size

    433KB

  • MD5

    01e9bd4f08e9c2180c75b05745bbcc61

  • SHA1

    1e5f93011efb8b7acbea411a956e58e250a7d8b0

  • SHA256

    823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c

  • SHA512

    f591612759201137ce9576676ef421330c2b9560985ef45f2cbfb6564add81fbed0361561b78c8ec374e5765798fd4c2afa709dcc2f0cf344c81f951d63f38c4

  • SSDEEP

    12288:SLWrL0zjHmIhqikdF1jerA9PNohh7nSERNVF:SLWrgz77NU9PNOnlRN/

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 10 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • Nirsoft 2 IoCs
  • UPX packed file 9 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 4 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
    "C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1380
    • C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
      "C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:824
      • C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
        "C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Modifies system certificate store
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:908
        • C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\jGTu1R6q8Y.ini"
          4⤵
            PID:1136
          • C:\Users\Admin\AppData\Local\Temp\823f0cf6d14db7d2a38405d3ab7bba8ffc918b989677db872c0f48921b02ce1c.exe
            /scomma "C:\Users\Admin\AppData\Local\Temp\wdzZ6CR0dE.ini"
            4⤵
            • Accesses Microsoft Outlook accounts
            PID:1520

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\jGTu1R6q8Y.ini

      Filesize

      5B

      MD5

      d1ea279fb5559c020a1b4137dc4de237

      SHA1

      db6f8988af46b56216a6f0daf95ab8c9bdb57400

      SHA256

      fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

      SHA512

      720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

    • memory/824-54-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-55-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-57-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-58-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-59-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-60-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-62-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-65-0x00000000757A1000-0x00000000757A3000-memory.dmp

      Filesize

      8KB

    • memory/824-66-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/824-75-0x0000000000400000-0x0000000000449000-memory.dmp

      Filesize

      292KB

    • memory/908-72-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/908-85-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/908-67-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/908-68-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/908-98-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/908-97-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/908-70-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/1136-86-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/1136-84-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/1136-87-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/1136-83-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/1136-79-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/1520-90-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1520-94-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1520-95-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1520-96-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB