Analysis

  • max time kernel
    97s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-10-2022 23:52

General

  • Target

    cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe

  • Size

    340KB

  • MD5

    dfe4a1cd1e822fba707b9d20017d0084

  • SHA1

    e273c86578c9207b08c5d0517438cef0677a0330

  • SHA256

    cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b

  • SHA512

    7e57b2e54741952da97c0c82631aba1a16dcbc797ff8500b3ae0f4d431e2d73ba742fb41378a3e61cafc96829a3c1a37be7c339780ed640d3c5eb6c5bce62c49

  • SSDEEP

    6144:PXUQPN4gKo6iLoHIZvHPfrDW/MAfxitOW3IVhoOtmKWJVSFS1/uLJI:PigKoBcHWry/bjI2IVu

Malware Config

Signatures

  • ISR Stealer

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

  • ISR Stealer payload 4 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.

  • Drops startup file 1 IoCs
  • 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.

  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe
    "C:\Users\Admin\AppData\Local\Temp\cdff44668207a42d3e83721029d666d72482b696e2e6db8e8dbc4f8b3440370b.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:680
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3440
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe
        /scomma "C:\Users\Admin\AppData\Local\Temp\TKX0yq9v8q.ini"
        3⤵
          PID:4424
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\Cvtres.exe
          /scomma "C:\Users\Admin\AppData\Local\Temp\PYLAGmazPh.ini"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:1464

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\TKX0yq9v8q.ini

      Filesize

      5B

      MD5

      d1ea279fb5559c020a1b4137dc4de237

      SHA1

      db6f8988af46b56216a6f0daf95ab8c9bdb57400

      SHA256

      fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

      SHA512

      720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

    • memory/680-133-0x00000000752E0000-0x0000000075891000-memory.dmp

      Filesize

      5.7MB

    • memory/680-148-0x00000000752E0000-0x0000000075891000-memory.dmp

      Filesize

      5.7MB

    • memory/680-132-0x00000000752E0000-0x0000000075891000-memory.dmp

      Filesize

      5.7MB

    • memory/1464-153-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1464-150-0x0000000000000000-mapping.dmp

    • memory/1464-151-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1464-155-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/1464-154-0x0000000000400000-0x000000000041F000-memory.dmp

      Filesize

      124KB

    • memory/3440-135-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/3440-156-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/3440-137-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/3440-134-0x0000000000000000-mapping.dmp

    • memory/3440-149-0x0000000000400000-0x0000000000442000-memory.dmp

      Filesize

      264KB

    • memory/4424-140-0x0000000000000000-mapping.dmp

    • memory/4424-146-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/4424-145-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/4424-144-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/4424-143-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB

    • memory/4424-141-0x0000000000400000-0x0000000000453000-memory.dmp

      Filesize

      332KB