Overview

overview

10

Static

static

10

55e50d60fc...7a.exe

windows10-2004-x64

10

55e50d60fc...7a.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    11/07/2026, 14:55

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General

  • Target
    55e50d60fc62653718fe145bef4459710371f10b205b47a91719e10efec1707a.exe
  • Size 45KB
  • Sample260711-sartfaey2s
  • SHA256 55e50d60fc62653718fe145bef4459710371f10b205b47a91719e10efec1707a
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • schijndelse.nl:80

  • schijndelse.nl:22

  • schijndelse.nl:8080

  • schijndelse.nl:8880

  • schijndelse.nl:2052

  • schijndelse.nl:2082

  • schijndelse.nl:2086

  • schijndelse.nl:2095

  • schijndelse.nl:443

  • schijndelse.nl:2053

  • schijndelse.nl:2083

  • schijndelse.nl:2087

  • schijndelse.nl:2096

  • schijndelse.nl:8443

  • www.schijndelse.nl:80

  • www.schijndelse.nl:22

  • www.schijndelse.nl:8080

  • www.schijndelse.nl:8880

  • www.schijndelse.nl:2052

  • www.schijndelse.nl:2082

Mutex

  • lRf1lTIFAvfJ

Attributes
  • delay

    0

  • install

    true

  • install_file

    yrz1fwno.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).

  • 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 29 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\55e50d60fc62653718fe145bef4459710371f10b205b47a91719e10efec1707a.exe
    "C:\Users\Admin\AppData\Local\Temp\55e50d60fc62653718fe145bef4459710371f10b205b47a91719e10efec1707a.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3412
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "yrz1fwno" /tr '"C:\Users\Admin\AppData\Roaming\yrz1fwno.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4148
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "yrz1fwno" /tr '"C:\Users\Admin\AppData\Roaming\yrz1fwno.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4652
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpE0F5.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:6036
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2692
      • C:\Users\Admin\AppData\Roaming\yrz1fwno.exe
        "C:\Users\Admin\AppData\Roaming\yrz1fwno.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2000
  • C:\Users\Admin\AppData\Roaming\yrz1fwno.exe
    "C:\Users\Admin\AppData\Roaming\yrz1fwno.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:1404

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmpE0F5.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmpE0F5.tmp.bat
        • Size 152B
        • SHA256 237e10e95b898a89978926b9f122ff1258d7b22709258e292a298c0b8b9f0e9b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        yrz1fwno.exe
        • Path C:\Users\Admin\AppData\Roaming\yrz1fwno.exe
        • Size 45KB
        • SHA256 55e50d60fc62653718fe145bef4459710371f10b205b47a91719e10efec1707a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1404-12-0x0000000075160000-0x000000007591C000-memory.dmp
        Download

        memory/1404-14-0x0000000075160000-0x000000007591C000-memory.dmp
        Download

        memory/3412-0-0x0000000075172000-0x0000000075173000-memory.dmp
        Download

        memory/3412-1-0x0000000000E80000-0x0000000000E92000-memory.dmp
        Download

        memory/3412-2-0x0000000075160000-0x000000007591C000-memory.dmp
        Download

        memory/3412-3-0x00000000059B0000-0x0000000005A4C000-memory.dmp
        Download

        memory/3412-9-0x0000000075160000-0x000000007591C000-memory.dmp
        Download