Overview

overview

10

Static

static

10

23fecdf4b6...37.exe

windows10-2004-x64

10

23fecdf4b6...37.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    18/07/2026, 16:48

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General

  • Target
    23fecdf4b6bc0a1e751f3e0f27e3a83c6bfb7d11c33d3a0ad74e7e8078d8cf37.exe
  • Size 45KB
  • Sample260718-vbayesbs71
  • SHA256 23fecdf4b6bc0a1e751f3e0f27e3a83c6bfb7d11c33d3a0ad74e7e8078d8cf37
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • sexsexviet.com:80

  • sexsexviet.com:22

  • sexsexviet.com:8080

  • sexsexviet.com:8880

  • sexsexviet.com:2052

  • sexsexviet.com:2082

  • sexsexviet.com:2086

  • sexsexviet.com:2095

  • sexsexviet.com:443

  • sexsexviet.com:2053

  • sexsexviet.com:2083

  • sexsexviet.com:2087

  • sexsexviet.com:2096

  • sexsexviet.com:8443

  • www.sexsexviet.com:80

  • www.sexsexviet.com:22

  • www.sexsexviet.com:8080

  • www.sexsexviet.com:8880

  • www.sexsexviet.com:2052

  • www.sexsexviet.com:2082

Mutex

  • xLTVEnHu44tP

Attributes
  • delay

    0

  • install

    true

  • install_file

    k8u4bx.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\23fecdf4b6bc0a1e751f3e0f27e3a83c6bfb7d11c33d3a0ad74e7e8078d8cf37.exe
    "C:\Users\Admin\AppData\Local\Temp\23fecdf4b6bc0a1e751f3e0f27e3a83c6bfb7d11c33d3a0ad74e7e8078d8cf37.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4300
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "k8u4bx" /tr '"C:\Users\Admin\AppData\Roaming\k8u4bx.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2164
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "k8u4bx" /tr '"C:\Users\Admin\AppData\Roaming\k8u4bx.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:5132
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6557.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1132
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1480
      • C:\Users\Admin\AppData\Roaming\k8u4bx.exe
        "C:\Users\Admin\AppData\Roaming\k8u4bx.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:5816
  • C:\Users\Admin\AppData\Roaming\k8u4bx.exe
    "C:\Users\Admin\AppData\Roaming\k8u4bx.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:244
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:4616

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          tmp6557.tmp.bat
          • Path C:\Users\Admin\AppData\Local\Temp\tmp6557.tmp.bat
          • Size 150B
          • SHA256 93cf76ef3d2b1f244165c0fc9e9d82265d7a10b2912f6a7957e5a46b156cebf7
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          k8u4bx.exe
          • Path C:\Users\Admin\AppData\Roaming\k8u4bx.exe
          • Size 45KB
          • SHA256 23fecdf4b6bc0a1e751f3e0f27e3a83c6bfb7d11c33d3a0ad74e7e8078d8cf37
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/244-12-0x0000000074E10000-0x00000000755CC000-memory.dmp
          Download

          memory/244-14-0x0000000074E10000-0x00000000755CC000-memory.dmp
          Download

          memory/4300-0-0x0000000074F92000-0x0000000074F93000-memory.dmp
          Download

          memory/4300-1-0x0000000000E60000-0x0000000000E72000-memory.dmp
          Download

          memory/4300-2-0x0000000074F80000-0x000000007573C000-memory.dmp
          Download

          memory/4300-3-0x00000000059E0000-0x0000000005A7C000-memory.dmp
          Download

          memory/4300-8-0x0000000074F80000-0x000000007573C000-memory.dmp
          Download