Analysis

  • max time kernel
    140s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-11-2022 18:11

General

  • Target

    a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe

  • Size

    331KB

  • MD5

    5a2b8bf9ea5dfafb7468ec652fd48323

  • SHA1

    35c3732955886a03080bd339d528912c3f2d4d2d

  • SHA256

    a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844

  • SHA512

    998f8ccce9f8753615fbb95900484c367bd0d0e557caa167d5608248610f8ac18c72d19baa1be48457100cff68f336795ddf1b00f1dac229d02cf26975692e00

  • SSDEEP

    6144:v99o5yvLuXiP/v+97vx7o18Ydquy+ozR1dlZ2:vo5yvLuyf+9bxuqt+oV1dlQ

Malware Config

Signatures

  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Executes dropped EXE 1 IoCs
  • 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.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe
    "C:\Users\Admin\AppData\Local\Temp\a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe"
    1⤵
    • Modifies system executable filetype association
    • Checks computer location settings
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2952
    • C:\Users\Admin\AppData\Local\Temp\3582-490\a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe"
      2⤵
      • Executes dropped EXE
      PID:4580
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4580 -s 224
        3⤵
        • Program crash
        PID:2888
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4580 -ip 4580
    1⤵
      PID:4960

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\3582-490\a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe

      Filesize

      290KB

      MD5

      b1c685247e32f89784d4e22ac87d1232

      SHA1

      151f2904e472c06b04b1869cec1977c593143324

      SHA256

      7f574bcf40e83e02d618777a7a8f573ced900a643fa38a8c2c26867a2f1a023b

      SHA512

      5754a342c7dcb5bbbaa72d258997db4d716bc75dfa7848615f4ce25d88e43441fc72bc40238c0613cd279d6347ee29eea1ba3a73561ff07a4fa847d6460f2099

    • C:\Users\Admin\AppData\Local\Temp\3582-490\a1814f705386a561ab74a9b190c8d1a9c8ad3e0b6482846e272820a2be38e844.exe

      Filesize

      290KB

      MD5

      b1c685247e32f89784d4e22ac87d1232

      SHA1

      151f2904e472c06b04b1869cec1977c593143324

      SHA256

      7f574bcf40e83e02d618777a7a8f573ced900a643fa38a8c2c26867a2f1a023b

      SHA512

      5754a342c7dcb5bbbaa72d258997db4d716bc75dfa7848615f4ce25d88e43441fc72bc40238c0613cd279d6347ee29eea1ba3a73561ff07a4fa847d6460f2099

    • memory/4580-132-0x0000000000000000-mapping.dmp