Overview

overview

3

Static

static

1

Stage 2 Malware.zip

windows10-2004-x64

1

Autoit3.exe

windows10-2004-x64

3

fncfxb.au3.malware

windows10-2004-x64

3

Analysis

  • max time kernel
    139s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230831-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-09-2023 08:33

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General

  • Target

    fncfxb.au3.malware

  • Size

    760KB

  • MD5

    548b423833439879e2ef091a3b38fdd7

  • SHA1

    fc7abba81f21bb68653983ce6770e3e3156ee62e

  • SHA256

    bd8fc787abfebba8d167e9979c2ec692f861ab21ea138c3381daa852a58677be

  • SHA512

    183df28fddd70493fb56f4654f1af30f0e046f8f04ec6aa40e8115ed2cabe1b7f1b71a9b4fe52d80f93cc30271f54c5f365b512d33b91f4ba79b3da20e541795

  • SSDEEP

    12288:0GPp9+e8zj98hVcp64FV42p5ot4k6on9Nkt22oV64P3FmMmVxcxlMY1D:0GPplGp64FLSitoi22oV6w3FmMSxWl7J

Score
3/10

Malware Config

Signatures

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 2 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of SetWindowsHookEx 47 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\fncfxb.au3.malware
    1⤵
    • Modifies registry class
    PID:4128
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4484
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\fncfxb.au3.malware
      2⤵
      • Opens file in notepad (likely ransom note)
      PID:1960

Network

MITRE ATT&CK Enterprise v15

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Downloads