Overview

overview

10

Static

static

10

AsyncClient.exe

windows10-2004-x64

10

AsyncClient.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260130-en
  • resource tags

    arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    07/05/2026, 00:27

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General

  • Target
    AsyncClient.exe
  • Size 45KB
  • Sample260507-ar2e4acw5x
  • SHA256 5e444eaa8ae5f32da481693ee84cb0e0d14b1f13b6fe15b9fcd4a676525691e0
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdiscoveryasyncratrat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • leoh.io:6606

  • leoh.io:7707

  • leoh.io:8808

  • leoh.io:443

  • leoh.io:80

  • leoh.io:22

  • leoh.io:53

  • nowatch.tv:6606

  • nowatch.tv:7707

  • nowatch.tv:8808

  • nowatch.tv:443

  • nowatch.tv:80

  • nowatch.tv:22

  • nowatch.tv:53

  • freeroam.io:6606

  • freeroam.io:7707

  • freeroam.io:8808

  • freeroam.io:443

  • freeroam.io:80

  • freeroam.io:22

Mutex

  • FtTRmAL1FxCo

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
  • Unexpected DNS network traffic destination 3 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⤵
    • Unexpected DNS network traffic destination
    • System Location Discovery: System Language Discovery
    PID:5080

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        memory/5080-0-0x00000000007B0000-0x00000000007C2000-memory.dmp
        Download

        memory/5080-1-0x0000000005170000-0x0000000005180000-memory.dmp
        Download

        memory/5080-2-0x0000000005180000-0x000000000527E000-memory.dmp
        Download

        memory/5080-3-0x0000000005170000-0x0000000005180000-memory.dmp
        Download