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
    150s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/07/2026, 06:41

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General

  • Target
    AsyncClient.exe
  • Size 47KB
  • Sample260722-hf73haxtc1
  • SHA256 fa30793885bc5987f539483988445404781fecac2b5b6ffa15032c0a0ffa872a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • 188.163.115.50:6606

  • 188.163.115.50:7707

  • 188.163.115.50:8808

  • 188.163.115.50:55577

  • 188.163.115.50:80

  • 45.147.46.122:6606

  • 45.147.46.122:7707

  • 45.147.46.122:8808

  • 45.147.46.122:55577

  • 45.147.46.122:80

Mutex

  • FKPc5QLGojn2

Attributes
  • delay

    3

  • install

    true

  • install_file

    MicrosoftEdgeUpdater.exe

  • install_folder

    %AppData%

  • local_host

    127.0.0.1

  • private_ip

    192.168.162.1

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).

  • 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 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⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4248
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftEdgeUpdater" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5964
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftEdgeUpdater" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:6072
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1CD5.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2572
      • C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe
        "C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3560
  • C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe
    "C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:1268

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp1CD5.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp1CD5.tmp.bat
        • Size 164B
        • SHA256 9e3a1b893b3282fcf7e3368a115f3cf37e74596d49682266b4b8e636608c0a97
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        MicrosoftEdgeUpdater.exe
        • Path C:\Users\Admin\AppData\Roaming\MicrosoftEdgeUpdater.exe
        • Size 47KB
        • SHA256 fa30793885bc5987f539483988445404781fecac2b5b6ffa15032c0a0ffa872a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1268-13-0x0000000074C60000-0x000000007541C000-memory.dmp
        Download

        memory/1268-15-0x0000000074C60000-0x000000007541C000-memory.dmp
        Download

        memory/4248-0-0x0000000074C72000-0x0000000074C73000-memory.dmp
        Download

        memory/4248-1-0x0000000000100000-0x0000000000112000-memory.dmp
        Download

        memory/4248-2-0x0000000074C60000-0x000000007541C000-memory.dmp
        Download

        memory/4248-3-0x0000000004BD0000-0x0000000004C36000-memory.dmp
        Download

        memory/4248-4-0x0000000005060000-0x00000000050FC000-memory.dmp
        Download

        memory/4248-9-0x0000000074C60000-0x000000007541C000-memory.dmp
        Download