Analysis

  • max time kernel
    142s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-11-2024 20:27

General

  • Target

    1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea.exe

  • Size

    729KB

  • MD5

    d710a738d8142ebc82139dcf470f9a6d

  • SHA1

    a97025796412b19e65e6d6bead9ba2a9479eb8cf

  • SHA256

    1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea

  • SHA512

    0864728af5d37ee1ccbcff346ba57834ddce10c657e621c714512edf37af837e3fbd878b83c9f4f656b91b6948802d85689e0c73acbac708f3f34c68f4d5b1cd

  • SSDEEP

    6144:k9u9Jy/p5DLIc6y/p59prxTRtuEZIVavADb50rj50rV:rJyHIVyH9/UavADNeW

Malware Config

Signatures

  • Detect Neshta payload 6 IoCs
  • Neshta

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

  • Neshta family
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 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).

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea.exe
    "C:\Users\Admin\AppData\Local\Temp\1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea.exe"
    1⤵
    • Checks computer location settings
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1828
    • C:\Users\Admin\AppData\Local\Temp\3582-490\1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:1048
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 1048 -s 408
        3⤵
        • Program crash
        PID:1540
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1048 -ip 1048
    1⤵
      PID:3252

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\PROGRA~2\Adobe\ACROBA~1\Reader\ACROTE~1.EXE

      Filesize

      86KB

      MD5

      3b73078a714bf61d1c19ebc3afc0e454

      SHA1

      9abeabd74613a2f533e2244c9ee6f967188e4e7e

      SHA256

      ded54d1fcca07b6bff2bc3b9a1131eac29ff1f836e5d7a7c5c325ec5abe96e29

      SHA512

      75959d4e8a7649c3268b551a2a378e6d27c0bfb03d2422ebeeb67b0a3f78c079473214057518930f2d72773ce79b106fd2d78405e8e3d8883459dcbb49c163c4

    • C:\Users\Admin\AppData\Local\Temp\3582-490\1fab8ef78f265b38f06cc73b7a37585f20b6eb5c6c51e05501c1e1bace5e44ea.exe

      Filesize

      688KB

      MD5

      f0df449b0a9af6ca68669e4a1d54dc8e

      SHA1

      a6234fb3fb895b851671075b705ea6bd2b8f4119

      SHA256

      4c9551c7498bbfc3eb3946a9c8f38ce433984203ab131ad2c25fe9ed449e1b99

      SHA512

      d953b9970aea6b917c541ffadcc08f749a7805a3bf090c2ad9757a998cad333d42e8c046df98659b07d32384b0bf646f91377384fe3bd519b91ad7b3909d0a69

    • memory/1828-95-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/1828-96-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/1828-97-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/1828-98-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/1828-100-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB