Overview

overview

10

Static

static

10

d42f8bb710...b3.exe

windows10-2004-x64

10

d42f8bb710...b3.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    145s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    31/08/2026, 13:41

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General

  • Target
    d42f8bb7103c23809a58eb24117c303da94ea9903b19eac77677a3a7e64a06b3.exe
  • Size 45KB
  • Sample260831-qy67xsshmg
  • SHA256 d42f8bb7103c23809a58eb24117c303da94ea9903b19eac77677a3a7e64a06b3
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultcommand_and_controldefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • javsub.blog:80

  • javsub.blog:22

  • javsub.blog:8080

  • javsub.blog:8880

  • javsub.blog:2052

  • javsub.blog:2082

  • javsub.blog:2086

  • javsub.blog:2095

  • javsub.blog:443

  • javsub.blog:2053

  • javsub.blog:2083

  • javsub.blog:2087

  • javsub.blog:2096

  • javsub.blog:8443

  • www.javsub.blog:80

  • www.javsub.blog:22

  • www.javsub.blog:8080

  • www.javsub.blog:8880

  • www.javsub.blog:2052

  • www.javsub.blog:2082

Mutex

  • y2XJ8xUIqHMA

Attributes
  • delay

    0

  • install

    true

  • install_file

    40ks.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
  • Executes dropped EXE 2 IoCs
  • Outbound SSH connection to public host 2 TTPs 4 IoCs

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

    command_and_control
  • 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 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d42f8bb7103c23809a58eb24117c303da94ea9903b19eac77677a3a7e64a06b3.exe
    "C:\Users\Admin\AppData\Local\Temp\d42f8bb7103c23809a58eb24117c303da94ea9903b19eac77677a3a7e64a06b3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1188
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "40ks" /tr '"C:\Users\Admin\AppData\Roaming\40ks.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2256
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "40ks" /tr '"C:\Users\Admin\AppData\Roaming\40ks.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1772
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8C77.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5124
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3404
      • C:\Users\Admin\AppData\Roaming\40ks.exe
        "C:\Users\Admin\AppData\Roaming\40ks.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1368
  • C:\Users\Admin\AppData\Roaming\40ks.exe
    "C:\Users\Admin\AppData\Roaming\40ks.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2656

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp8C77.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp8C77.tmp.bat
        • Size 148B
        • SHA256 48fd89bf4ea361076aff22c025cb6cd4e816f24d87b73c7f96e2e0f3264b9e69
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        40ks.exe
        • Path C:\Users\Admin\AppData\Roaming\40ks.exe
        • Size 45KB
        • SHA256 d42f8bb7103c23809a58eb24117c303da94ea9903b19eac77677a3a7e64a06b3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1188-0-0x0000000074D92000-0x0000000074D93000-memory.dmp
        Download

        memory/1188-1-0x00000000007D0000-0x00000000007E2000-memory.dmp
        Download

        memory/1188-2-0x0000000074D80000-0x000000007553C000-memory.dmp
        Download

        memory/1188-3-0x0000000005340000-0x00000000053DC000-memory.dmp
        Download

        memory/1188-8-0x0000000074D80000-0x000000007553C000-memory.dmp
        Download

        memory/2656-12-0x0000000074C10000-0x00000000753CC000-memory.dmp
        Download

        memory/2656-14-0x0000000074C10000-0x00000000753CC000-memory.dmp
        Download