Overview

overview

10

Static

static

10

nysdufisdfi.exe

windows10-2004-x64

10

nysdufisdfi.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    30/07/2026, 10:22

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General

  • Target
    nysdufisdfi.exe
  • Size 45KB
  • Sample260730-md7feaff98
  • SHA256 2d23adddadc652330cb8ede9c2a425179138529b23d7f1a2c1fed56362c8764c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
admindefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Admin

C2

  • toparenaslot.co/vi-vn/:80

  • toparenaslot.co/vi-vn/:443

  • toparenaslot.co/vi-vn/:7788

  • toparenaslot.co/vi-vn/:7879

  • toparenaslot.co/vi-vn/:3577

  • toparenaslot.co/:80

  • toparenaslot.co/:443

  • toparenaslot.co/:7788

  • toparenaslot.co/:7879

  • toparenaslot.co/:3577

  • www.toparenaslot.co/:80

  • www.toparenaslot.co/:443

  • www.toparenaslot.co/:7788

  • www.toparenaslot.co/:7879

  • www.toparenaslot.co/:3577

Mutex

  • R5o1yXCQ2suA

Attributes
  • delay

    3

  • install

    true

  • install_file

    nysdufisdfi.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

    execution
  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Delays execution with timeout.exe 1 IoCs
    defense_evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\nysdufisdfi.exe
    "C:\Users\Admin\AppData\Local\Temp\nysdufisdfi.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5060
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "nysdufisdfi" /tr '"C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3324
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "nysdufisdfi" /tr '"C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4404
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp35A1.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:456
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1912
      • C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe
        "C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1704
  • C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe
    "C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:4900

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        nysdufisdfi.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\nysdufisdfi.exe.log
        • Size 522B
        • SHA256 2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tmp35A1.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp35A1.tmp.bat
        • Size 155B
        • SHA256 34557719d18953d790f80901f8bb8e33ef2e1ae589afaf58c14106e2785c2466
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nysdufisdfi.exe
        • Path C:\Users\Admin\AppData\Roaming\nysdufisdfi.exe
        • Size 45KB
        • SHA256 2d23adddadc652330cb8ede9c2a425179138529b23d7f1a2c1fed56362c8764c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/5060-0-0x00000000008A0000-0x00000000008B2000-memory.dmp
        Download

        memory/5060-1-0x00000000052B0000-0x00000000052C0000-memory.dmp
        Download

        memory/5060-2-0x0000000005360000-0x00000000053FC000-memory.dmp
        Download