Analysis

  • max time kernel
    92s
  • max time network
    93s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-11-2024 01:05

General

  • Target

    d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692cN.exe

  • Size

    468KB

  • MD5

    b8c5a64922131bc2467a125e5b7974c0

  • SHA1

    c7eb485fab9fc263e58bb49db6577f0eb3c26713

  • SHA256

    d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692c

  • SHA512

    504a48070800b700d17f55a96bf9119fcab30edad079e628b1bdcd1275e59513b4620cd9fe8973c364990fca4b9ad0632bbe066786fba292068ee19cd51b157c

  • SSDEEP

    12288:FKhsfoPA+yeVKUCUxP4C902bdRtJJPiWC:JfcdHj4fmbZC

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\d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692cN.exe
    "C:\Users\Admin\AppData\Local\Temp\d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692cN.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:920
    • C:\Users\Admin\AppData\Local\Temp\3582-490\d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692cN.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692cN.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4348
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4348 -s 560
        3⤵
        • Program crash
        PID:4704
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4348 -ip 4348
    1⤵
      PID:3704

    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\d087d666a52d63b21735b134ade37fad44cdf5e9e201fb11558de1ca2533692cN.exe

      Filesize

      428KB

      MD5

      51d2182e92b5f58bdef71b2e2a515c03

      SHA1

      6b0849f65a7bb98ef5666607eb9d9b2cc83cd014

      SHA256

      845dad9ed28534d87e61941cda7b1c23976e20f48b55ac4ac6bb3171907a41e9

      SHA512

      c21940a29d59fa7f3647e47c6464f0d4edf46bc72e8dbf327d120530377cb2ee70bd852f9c3206fc06b76c906ec0cc9bc7a3fbb231e364cb9267d7af1af09fce

    • memory/920-98-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/920-99-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/920-101-0x0000000000400000-0x000000000041B000-memory.dmp

      Filesize

      108KB

    • memory/4348-12-0x00000000006B0000-0x00000000007B7000-memory.dmp

      Filesize

      1.0MB

    • memory/4348-14-0x00000000006B0000-0x00000000007B7000-memory.dmp

      Filesize

      1.0MB