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
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/08/2026, 00:21

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General

  • Target
    AsyncClient.exe
  • Size 45KB
  • Sample260802-anj2msam9s
  • SHA256 f3de56505dbdc86f1a16be4c970135f02b738705000384e45a74454872d75ed6
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultcommand_and_controldiscoveryasyncratrat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • installatiebedrijfahdejong.nl:6606

  • installatiebedrijfahdejong.nl:7707

  • installatiebedrijfahdejong.nl:8808

  • installatiebedrijfahdejong.nl:443

  • installatiebedrijfahdejong.nl:80

  • installatiebedrijfahdejong.nl:8844

  • installatiebedrijfahdejong.nl:22

  • installatiebedrijfahdejong.nl:53

  • quicknet.com.co:6606

  • quicknet.com.co:7707

  • quicknet.com.co:8808

  • quicknet.com.co:443

  • quicknet.com.co:80

  • quicknet.com.co:8844

  • quicknet.com.co:22

  • quicknet.com.co:53

  • rajajackpot.jp.net:6606

  • rajajackpot.jp.net:7707

  • rajajackpot.jp.net:8808

  • rajajackpot.jp.net:443

Mutex

  • 4UWs9OPJ8vyg

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

    ratasyncrat
  • Outbound SSH connection to public host 2 TTPs 2 IoCs

    SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

    command_and_control
  • Unexpected DNS network traffic destination 2 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

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

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

    discovery

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Outbound SSH connection to public host
    • Unexpected DNS network traffic destination
    • System Location Discovery: System Language Discovery
    PID:5684

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/5684-0-0x0000000074F52000-0x0000000074F53000-memory.dmp
        Download

        memory/5684-1-0x0000000000670000-0x0000000000682000-memory.dmp
        Download

        memory/5684-2-0x0000000074F40000-0x00000000756FC000-memory.dmp
        Download

        memory/5684-3-0x0000000074F52000-0x0000000074F53000-memory.dmp
        Download

        memory/5684-4-0x0000000074F40000-0x00000000756FC000-memory.dmp
        Download