Overview

overview

10

Static

static

10

b16fa2daee...18.exe

windows10-2004-x64

10

b16fa2daee...18.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    11/07/2026, 14:26

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General

  • Target
    b16fa2daee1810d9bec306cf7cbee26e0438772ec5462277c83b8a7cb8ba0118.exe
  • Size 45KB
  • Sample260711-rr253aet2t
  • SHA256 b16fa2daee1810d9bec306cf7cbee26e0438772ec5462277c83b8a7cb8ba0118
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • sexvietvcl.com:80

  • sexvietvcl.com:22

  • sexvietvcl.com:8080

  • sexvietvcl.com:8880

  • sexvietvcl.com:2052

  • sexvietvcl.com:2082

  • sexvietvcl.com:2086

  • sexvietvcl.com:2095

  • sexvietvcl.com:443

  • sexvietvcl.com:2053

  • sexvietvcl.com:2083

  • sexvietvcl.com:2087

  • sexvietvcl.com:2096

  • sexvietvcl.com:8443

  • www.sexvietvcl.com:80

  • www.sexvietvcl.com:22

  • www.sexvietvcl.com:8080

  • www.sexvietvcl.com:8880

  • www.sexvietvcl.com:2052

  • www.sexvietvcl.com:2082

Mutex

  • PwPd46mxcsNp

Attributes
  • delay

    0

  • install

    true

  • install_file

    ynxb8.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
  • Executes dropped EXE 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b16fa2daee1810d9bec306cf7cbee26e0438772ec5462277c83b8a7cb8ba0118.exe
    "C:\Users\Admin\AppData\Local\Temp\b16fa2daee1810d9bec306cf7cbee26e0438772ec5462277c83b8a7cb8ba0118.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ynxb8" /tr '"C:\Users\Admin\AppData\Roaming\ynxb8.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5996
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "ynxb8" /tr '"C:\Users\Admin\AppData\Roaming\ynxb8.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:5804
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp40B8.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4648
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3528
      • C:\Users\Admin\AppData\Roaming\ynxb8.exe
        "C:\Users\Admin\AppData\Roaming\ynxb8.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2144
  • C:\Users\Admin\AppData\Roaming\ynxb8.exe
    "C:\Users\Admin\AppData\Roaming\ynxb8.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:1396

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp40B8.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp40B8.tmp.bat
        • Size 149B
        • SHA256 89eea57b183ec4665945d6e702afc8e2934de0e8595a2f9597103f304fa12dcf
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ynxb8.exe
        • Path C:\Users\Admin\AppData\Roaming\ynxb8.exe
        • Size 45KB
        • SHA256 b16fa2daee1810d9bec306cf7cbee26e0438772ec5462277c83b8a7cb8ba0118
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1396-12-0x0000000074640000-0x0000000074DFC000-memory.dmp
        Download

        memory/1396-14-0x0000000074640000-0x0000000074DFC000-memory.dmp
        Download

        memory/2892-0-0x00000000747C2000-0x00000000747C3000-memory.dmp
        Download

        memory/2892-1-0x0000000000720000-0x0000000000732000-memory.dmp
        Download

        memory/2892-2-0x00000000747B0000-0x0000000074F6C000-memory.dmp
        Download

        memory/2892-3-0x0000000005270000-0x000000000530C000-memory.dmp
        Download

        memory/2892-8-0x00000000747B0000-0x0000000074F6C000-memory.dmp
        Download