Analysis

  • max time kernel
    93s
  • max time network
    94s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-11-2024 12:08

General

  • Target

    ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0N.exe

  • Size

    468KB

  • MD5

    c7914e46dfacefec56e0f9ac16e1f850

  • SHA1

    0538d26400c7610c5453cd284554438a5e25b1a2

  • SHA256

    ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0

  • SHA512

    e3643bd4c6cc2b187cc7a3f8e9c6f27f7082e9edf8ab20af018060c871794491d0fe9de2cec47cc6ccb365ef773d4c83f1481f143fd664c1c843e410eedd4328

  • SSDEEP

    12288:FKhsfoPA+yeVKUCUxP4C902bdRtJJPiWC6Ov5S:JfcdHj4fmbZC6q5S

Malware Config

Signatures

  • Detect Neshta payload 4 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.

  • UPX packed file 3 IoCs

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

  • 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\ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0N.exe
    "C:\Users\Admin\AppData\Local\Temp\ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0N.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:2732
    • C:\Users\Admin\AppData\Local\Temp\3582-490\ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0N.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0N.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3084
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3084 -s 560
        3⤵
        • Program crash
        PID:2108
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3084 -ip 3084
    1⤵
      PID:3548

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    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\ac6905de844502d8f4fd107e25d073bf12159110cb36e316eb14eb6e21c1b9e0N.exe

      Filesize

      428KB

      MD5

      bb41888ee5f801c4516cbc026c01e332

      SHA1

      190e69cc5fa40a138f0f57f64e8072fab8c0f305

      SHA256

      d716f5abbe72926a42a3e23c946ea93f48ddc718e980b690f61f83244e15d3bd

      SHA512

      4a7975355bcecb3b219929822caa8d8c712c8e5749bcf373216b218e5c64fc5e95e478a21805b40067f1dbacf6752e3f3ac2c685f15760a94d316d6f5f3995f1

    • memory/2732-98-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/2732-99-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/2732-101-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/3084-12-0x0000000000470000-0x0000000000577000-memory.dmp

      Filesize

      1.0MB

    • memory/3084-14-0x0000000000470000-0x0000000000577000-memory.dmp

      Filesize

      1.0MB