Overview

overview

10

Static

static

10

kapp.exe

windows10-2004-x64

10

kapp.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    26/06/2026, 23:41

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General

  • Target
    kapp.exe
  • Size 46KB
  • Sample260626-3prgbsft6t
  • SHA256 1c801c8c4b9858fd9cb835f49f16d0ca2a604aa89dea9b1cdbb8f255a73d6227
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
nulldefense_evasionexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.6A

Botnet

  • null

C2

  • tcc.jp.net:6606

  • tcc.jp.net:7707

  • tcc.jp.net:8808

  • tcc.jp.net:443

  • tcc.jp.net:22

  • tcc.jp.net:80

Mutex

  • bhbxmarwzixddecyy

Attributes
  • delay

    5

  • install

    true

  • install_file

    svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

    ratasyncrat
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 32 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\kapp.exe
    "C:\Users\Admin\AppData\Local\Temp\kapp.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3636
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "'svchost"' /tr "'C:\Users\Admin\AppData\Roaming\svchost.exe"'
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:6008
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE4E.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2832
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3104
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1764

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmpE4E.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmpE4E.tmp.bat
        • Size 150B
        • SHA256 ab9961c610898fe8326229d42a756be7fd012f3cd5ee576276a320cc156123a4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        svchost.exe
        • Path C:\Users\Admin\AppData\Roaming\svchost.exe
        • Size 42.2MB
        • SHA256 8f18d198ce02b5a566fe3d3f3e2d30ecc4fd2d5f1f884f216b0523263cfd254a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/3636-0-0x00007FFC7185F000-0x00007FFC71860000-memory.dmp
        Download

        memory/3636-1-0x0000000000B80000-0x0000000000B92000-memory.dmp
        Download

        memory/3636-2-0x00007FFC716D0000-0x00007FFC72074000-memory.dmp
        Download

        memory/3636-3-0x00007FFC716D0000-0x00007FFC72074000-memory.dmp
        Download

        memory/3636-4-0x00007FFC716D0000-0x00007FFC72074000-memory.dmp
        Download

        memory/3636-5-0x00007FFC716D0000-0x00007FFC72074000-memory.dmp
        Download

        memory/3636-9-0x00007FFC716D0000-0x00007FFC72074000-memory.dmp
        Download