Overview

overview

10

Static

static

10

AsyncClient.exe

windows10-2004-x64

10

AsyncClient.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    10/09/2026, 10:26

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General

  • Target
    AsyncClient.exe
  • Size 47KB
  • Sample260910-mgr5wsar61
  • SHA256 569283a3f66bc0de3e28729c0bf63685fc29c0b1a800deb3a600345f089bdd8e
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • 789win7.mobi/:6606

  • 789win7.mobi/:7707

  • 789win7.mobi/:8808

  • 789win7.mobi/:8080

  • 789win7.mobi/:80

  • 789win7.mobi/:443

  • 789win7.mobi/:8443

  • 789win.indt.in/:6606

  • 789win.indt.in/:7707

  • 789win.indt.in/:8808

  • 789win.indt.in/:8080

  • 789win.indt.in/:80

  • 789win.indt.in/:443

  • 789win.indt.in/:8443

  • 789win01.dev/:6606

  • 789win01.dev/:7707

  • 789win01.dev/:8808

  • 789win01.dev/:8080

  • 789win01.dev/:80

  • 789win01.dev/:443

Mutex

  • KrfQPlnmWc8w

Attributes
  • delay

    3

  • install

    true

  • install_file

    ChromeUpdate.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 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3572
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4252
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "ChromeUpdate" /tr '"C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2932
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB9B6.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:632
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4724
      • C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
        "C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:760
  • C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
    "C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:2760

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmpB9B6.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmpB9B6.tmp.bat
        • Size 156B
        • SHA256 0bff6a32eb87e84f2c422c7a43a74b55c4d3fbcff6ce374261c8c9a13c5749fd
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ChromeUpdate.exe
        • Path C:\Users\Admin\AppData\Roaming\ChromeUpdate.exe
        • Size 47KB
        • SHA256 569283a3f66bc0de3e28729c0bf63685fc29c0b1a800deb3a600345f089bdd8e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/3572-0-0x00000000008B0000-0x00000000008C2000-memory.dmp
        Download

        memory/3572-1-0x0000000002CC0000-0x0000000002CD0000-memory.dmp
        Download

        memory/3572-2-0x0000000005280000-0x000000000531C000-memory.dmp
        Download