Analysis

  • max time kernel
    182s
  • max time network
    185s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/11/2022, 00:32

General

  • Target
    9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe
  • Size 1.1MB
  • Sample221130-avmfcaff3s
  • SHA256 9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d
  • 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 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe
    "C:\Users\Admin\AppData\Local\Temp\9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.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:1948
    • C:\Users\Admin\AppData\Local\Temp\3582-490\9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe"
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Suspicious use of WriteProcessMemory
      PID:2128
      • \??\c:\d44ac61\update\update.exe
        c:\d44ac61\update\update.exe
        3⤵
        • Executes dropped EXE
        • Enumerates system info in registry
        PID:424

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe
        • Size 1.1MB
        • SHA256 31257633f23627f02f494729278932d36748453e7ad66364d186b0b7cf44271e
        • MD5 SHA1 SHA512 SSDEEP

        9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\9c5b3eb7079ab91b25bf9f49445ae8c352572e15e9c2c43266c114a39651894d.exe
        • Size 1.1MB
        • SHA256 31257633f23627f02f494729278932d36748453e7ad66364d186b0b7cf44271e
        • MD5 SHA1 SHA512 SSDEEP

        update.exe

        • Path C:\d44ac61\update\update.exe
        • Size 267KB
        • SHA256 cb0db602b238397c103472e4249dbe065f9c2e9019fc3085a45250f8c05af96c
        • MD5 SHA1 SHA512 SSDEEP

        update.exe

        • Path \??\c:\d44ac61\update\update.exe
        • Size 267KB
        • SHA256 cb0db602b238397c103472e4249dbe065f9c2e9019fc3085a45250f8c05af96c
        • MD5 SHA1 SHA512 SSDEEP

        update.inf

        • Path \??\c:\d44ac61\update\update.inf
        • Size 6KB
        • SHA256 da4e9aa9d75a840a5aaca17f9452d8aba89ce083f19707709dc825d71717c470
        • MD5 SHA1 SHA512 SSDEEP