Overview

overview

10

Static

static

10

e55fca3300...21.exe

windows10-2004-x64

10

e55fca3300...21.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    08/06/2026, 19:14

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General

  • Target
    e55fca3300516bf17e6901d96a4193834f3ed460fbbf5f31966bfbdc61455221.exe
  • Size 45KB
  • Sample260608-xxybyses71
  • SHA256 e55fca3300516bf17e6901d96a4193834f3ed460fbbf5f31966bfbdc61455221
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • xnxx.com:8400

  • xnxx.com:9909

  • xnxx.com:8081

  • xnxx.com:3377

  • xnxx.com:2498

  • xnxx.com:1256

  • xnxx.com:9933

  • xnxx.com:2277

  • xnxx.com:5550

  • xnxx.com:7707

  • xnxx.com:7709

  • www.xnxx.com:8400

  • www.xnxx.com:9909

  • www.xnxx.com:8081

  • www.xnxx.com:3377

  • www.xnxx.com:2498

  • www.xnxx.com:1256

  • www.xnxx.com:9933

  • www.xnxx.com:2277

  • www.xnxx.com:5550

Mutex

  • 57nJVErnRPOo

Attributes
  • delay

    0

  • install

    true

  • install_file

    oyup.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 17 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e55fca3300516bf17e6901d96a4193834f3ed460fbbf5f31966bfbdc61455221.exe
    "C:\Users\Admin\AppData\Local\Temp\e55fca3300516bf17e6901d96a4193834f3ed460fbbf5f31966bfbdc61455221.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:8
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "oyup" /tr '"C:\Users\Admin\AppData\Roaming\oyup.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2188
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "oyup" /tr '"C:\Users\Admin\AppData\Roaming\oyup.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:6048
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5927.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4756
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:1676
      • C:\Users\Admin\AppData\Roaming\oyup.exe
        "C:\Users\Admin\AppData\Roaming\oyup.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1104
  • C:\Users\Admin\AppData\Roaming\oyup.exe
    "C:\Users\Admin\AppData\Roaming\oyup.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:728

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp5927.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp5927.tmp.bat
        • Size 148B
        • SHA256 15ecd6c20dddaf65cb476d996d46f7022a57c9aeecfb8514c33737cedd072340
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        oyup.exe
        • Path C:\Users\Admin\AppData\Roaming\oyup.exe
        • Size 45KB
        • SHA256 e55fca3300516bf17e6901d96a4193834f3ed460fbbf5f31966bfbdc61455221
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/8-0-0x0000000000060000-0x0000000000072000-memory.dmp
        Download

        memory/8-1-0x0000000004BD0000-0x0000000004BE0000-memory.dmp
        Download

        memory/8-2-0x0000000004B00000-0x0000000004B9C000-memory.dmp
        Download