Overview

overview

10

Static

static

10

8b42068a54...32.exe

windows10-2004-x64

10

8b42068a54...32.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    58s
  • max time network
    61s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/08/2026, 21:01

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General

  • Target
    8b42068a542886615613b122aa32bef9be558ec967180e1a8f32a2d968373b32.exe
  • Size 45KB
  • Sample260801-zvdwmsgk6s
  • SHA256 8b42068a542886615613b122aa32bef9be558ec967180e1a8f32a2d968373b32
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultcommand_and_controldefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • phimvkl.com:80

  • phimvkl.com:22

  • phimvkl.com:8080

  • phimvkl.com:8880

  • phimvkl.com:2052

  • phimvkl.com:2082

  • phimvkl.com:2086

  • phimvkl.com:2095

  • phimvkl.com:443

  • phimvkl.com:2053

  • phimvkl.com:2083

  • phimvkl.com:2087

  • phimvkl.com:2096

  • phimvkl.com:8443

  • www.phimvkl.com:80

  • www.phimvkl.com:22

  • www.phimvkl.com:8080

  • www.phimvkl.com:8880

  • www.phimvkl.com:2052

  • www.phimvkl.com:2082

Mutex

  • F3VBhwgUnvmO

Attributes
  • delay

    0

  • install

    true

  • install_file

    mrkn.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
  • Outbound SSH connection to public host 2 TTPs 3 IoCs

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

    command_and_control
  • 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 1 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

Processes

  • C:\Users\Admin\AppData\Local\Temp\8b42068a542886615613b122aa32bef9be558ec967180e1a8f32a2d968373b32.exe
    "C:\Users\Admin\AppData\Local\Temp\8b42068a542886615613b122aa32bef9be558ec967180e1a8f32a2d968373b32.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2196
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "mrkn" /tr '"C:\Users\Admin\AppData\Roaming\mrkn.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      PID:5804
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "mrkn" /tr '"C:\Users\Admin\AppData\Roaming\mrkn.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5616
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp480B.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      PID:1284
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3612
      • C:\Users\Admin\AppData\Roaming\mrkn.exe
        "C:\Users\Admin\AppData\Roaming\mrkn.exe"
        3⤵
          PID:2672
    • C:\Users\Admin\AppData\Roaming\mrkn.exe
      "C:\Users\Admin\AppData\Roaming\mrkn.exe"
      1⤵
        PID:3940

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            tmp480B.tmp.bat
            • Path C:\Users\Admin\AppData\Local\Temp\tmp480B.tmp.bat
            • Size 148B
            • SHA256 5cb03d72ff04f3efb5d002088fd202c832298ac95e3defdfc0036c8f5eeab230
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            mrkn.exe
            • Path C:\Users\Admin\AppData\Roaming\mrkn.exe
            • Size 45KB
            • SHA256 8b42068a542886615613b122aa32bef9be558ec967180e1a8f32a2d968373b32
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            memory/2196-0-0x0000000074472000-0x0000000074473000-memory.dmp
            Download

            memory/2196-1-0x0000000000AA0000-0x0000000000AB2000-memory.dmp
            Download

            memory/2196-2-0x0000000074460000-0x0000000074C1C000-memory.dmp
            Download

            memory/2196-3-0x0000000005630000-0x00000000056CC000-memory.dmp
            Download

            memory/2196-8-0x0000000074460000-0x0000000074C1C000-memory.dmp
            Download

            memory/3940-12-0x0000000074270000-0x0000000074A2C000-memory.dmp
            Download

            memory/3940-14-0x0000000074270000-0x0000000074A2C000-memory.dmp
            Download