Overview

overview

10

Static

static

10

hay88.exe

windows10-2004-x64

10

hay88.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    30/07/2026, 05:50

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General

  • Target
    hay88.exe
  • Size 45KB
  • Sample260730-gj1bdsvsas
  • SHA256 ba4652cc17e2dd36a30feffe9cc01c21799180531c3085ab52aebbddccd87dc8
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • yipan.co:80

  • yipan.co:8080

  • yipan.co:443

  • yipan.co:8443

  • yipan.co:3306

  • yipan.co:20

  • yipan.co:25

  • yipan.co:22

  • https://yipan.co:80

  • https://yipan.co:8080

  • https://yipan.co:443

  • https://yipan.co:8443

  • https://yipan.co:3306

  • https://yipan.co:20

  • https://yipan.co:25

  • https://yipan.co:22

Mutex

  • dWWUO0pEsgj1

Attributes
  • delay

    3

  • install

    true

  • install_file

    hay88.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
  • 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\hay88.exe
    "C:\Users\Admin\AppData\Local\Temp\hay88.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4760
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "hay88" /tr '"C:\Users\Admin\AppData\Roaming\hay88.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5420
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "hay88" /tr '"C:\Users\Admin\AppData\Roaming\hay88.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:6116
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC431.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4548
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3720
      • C:\Users\Admin\AppData\Roaming\hay88.exe
        "C:\Users\Admin\AppData\Roaming\hay88.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4884
  • C:\Users\Admin\AppData\Roaming\hay88.exe
    "C:\Users\Admin\AppData\Roaming\hay88.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:5104
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:3932

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          tmpC431.tmp.bat
          • Path C:\Users\Admin\AppData\Local\Temp\tmpC431.tmp.bat
          • Size 149B
          • SHA256 a79a43d73f804692d6805f5c9ca5764d4b7c5fa6d26132cae9f8bca21c6fe69f
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          hay88.exe
          • Path C:\Users\Admin\AppData\Roaming\hay88.exe
          • Size 45KB
          • SHA256 ba4652cc17e2dd36a30feffe9cc01c21799180531c3085ab52aebbddccd87dc8
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/4760-0-0x0000000074282000-0x0000000074283000-memory.dmp
          Download

          memory/4760-1-0x0000000000C00000-0x0000000000C12000-memory.dmp
          Download

          memory/4760-2-0x0000000074270000-0x0000000074A2C000-memory.dmp
          Download

          memory/4760-3-0x0000000005610000-0x00000000056AC000-memory.dmp
          Download

          memory/4760-9-0x0000000074270000-0x0000000074A2C000-memory.dmp
          Download

          memory/5104-12-0x0000000074270000-0x0000000074A2C000-memory.dmp
          Download

          memory/5104-14-0x0000000074270000-0x0000000074A2C000-memory.dmp
          Download