Overview

overview

10

Static

static

10

AsyncClient.exe

windows10-2004-x64

10

AsyncClient.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    11/08/2026, 04:10

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General

  • Target
    AsyncClient.exe
  • Size 47KB
  • Sample260811-erdfgswanf
  • SHA256 e0f9f8656851eaa727d38ad494f63847f82e1dae97303c4084be1f7b57b3acf1
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistenceratsuricata

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • 92.99.93.184:7070

Mutex

  • nGpCoMEHiRaO

Attributes
  • delay

    3

  • install

    true

  • install_file

    System.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

    ratasyncrat
  • Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound 2 IoCs

    Network activity triggered a Suricata alert

    suricataasyncrat
  • 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).

  • 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 31 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4216
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:6028
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "System" /tr '"C:\Users\Admin\AppData\Roaming\System.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2340
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9D8E.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4336
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1680
      • C:\Users\Admin\AppData\Roaming\System.exe
        "C:\Users\Admin\AppData\Roaming\System.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3836
  • C:\Users\Admin\AppData\Roaming\System.exe
    "C:\Users\Admin\AppData\Roaming\System.exe"
    1⤵
    • Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:5864
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:5548

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          tmp9D8E.tmp.bat
          • Path C:\Users\Admin\AppData\Local\Temp\tmp9D8E.tmp.bat
          • Size 150B
          • SHA256 d35eaffa90bc5797f4545a866ef530a93b278423ea7d322dac1f827c65ad1f19
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          System.exe
          • Path C:\Users\Admin\AppData\Roaming\System.exe
          • Size 47KB
          • SHA256 e0f9f8656851eaa727d38ad494f63847f82e1dae97303c4084be1f7b57b3acf1
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/4216-0-0x0000000074C82000-0x0000000074C83000-memory.dmp
          Download

          memory/4216-1-0x0000000000F00000-0x0000000000F12000-memory.dmp
          Download

          memory/4216-2-0x0000000074C70000-0x000000007542C000-memory.dmp
          Download

          memory/4216-3-0x0000000005AB0000-0x0000000005B16000-memory.dmp
          Download

          memory/4216-4-0x0000000005EC0000-0x0000000005F5C000-memory.dmp
          Download

          memory/4216-10-0x0000000074C70000-0x000000007542C000-memory.dmp
          Download

          memory/5864-13-0x0000000074C70000-0x000000007542C000-memory.dmp
          Download

          memory/5864-15-0x0000000074C70000-0x000000007542C000-memory.dmp
          Download

          memory/5864-16-0x0000000006820000-0x0000000006DDA000-memory.dmp
          Download