Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/11/2022, 00:32

General

  • Target
    5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe
  • Size 902KB
  • Sample221130-av2v2aff6s
  • SHA256 5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e
  • MD5 SHA1 SHA512 SSDEEP

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 2 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.

  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe
    "C:\Users\Admin\AppData\Local\Temp\5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.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:4736
    • C:\Users\Admin\AppData\Local\Temp\3582-490\5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe"
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Suspicious use of WriteProcessMemory
      PID:4920
      • \??\c:\b\update\update.exe
        c:\b\update\update.exe
        3⤵
        • Executes dropped EXE
        • Drops file in Windows directory
        • Suspicious use of AdjustPrivilegeToken
        PID:1988

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe
        • Size 861KB
        • SHA256 d7d9c2a15cbb55f00c41ee55ff60eea6fc34b0f93b1e8506b660dd8e24a38b88
        • MD5 SHA1 SHA512 SSDEEP

        5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\5987a4118d2299962fcd2919e14bd1937e5d5d5011475849887c4ee7b8acdb2e.exe
        • Size 861KB
        • SHA256 d7d9c2a15cbb55f00c41ee55ff60eea6fc34b0f93b1e8506b660dd8e24a38b88
        • MD5 SHA1 SHA512 SSDEEP

        update.exe

        • Path C:\b\update\update.exe
        • Size 399KB
        • SHA256 357c8aa2b1507c02625fbfcd79a382c163b23281be49e753ffe6a522125c0cf3
        • MD5 SHA1 SHA512 SSDEEP

        update.exe

        • Path \??\c:\b\update\update.exe
        • Size 399KB
        • SHA256 357c8aa2b1507c02625fbfcd79a382c163b23281be49e753ffe6a522125c0cf3
        • MD5 SHA1 SHA512 SSDEEP

        update.inf

        • Path \??\c:\b\update\update.inf
        • Size 25KB
        • SHA256 06b88504861d7be892f7382af8bc380a8caa2d282d6b12219cee00c561292625
        • MD5 SHA1 SHA512 SSDEEP

        memory/4920-135-0x0000000001000000-0x000000000101E000-memory.dmp

        memory/4920-140-0x0000000001000000-0x000000000101E000-memory.dmp