Overview

overview

10

Static

static

10

9a4bdc4eb0...b2.exe

windows10-2004-x64

10

9a4bdc4eb0...b2.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    11/07/2026, 04:39

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General

  • Target
    9a4bdc4eb049b7a468be1559337c4615ef4c2b7ef399ac323b86f904de7314b2.exe
  • Size 45KB
  • Sample260711-e934vsdz7z
  • SHA256 9a4bdc4eb049b7a468be1559337c4615ef4c2b7ef399ac323b86f904de7314b2
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • sexakula.net:80

  • sexakula.net:22

  • sexakula.net:8080

  • sexakula.net:8880

  • sexakula.net:2052

  • sexakula.net:2082

  • sexakula.net:2086

  • sexakula.net:2095

  • sexakula.net:443

  • sexakula.net:2053

  • sexakula.net:2083

  • sexakula.net:2087

  • sexakula.net:2096

  • sexakula.net:8443

  • www.sexakula.net:80

  • www.sexakula.net:22

  • www.sexakula.net:8080

  • www.sexakula.net:8880

  • www.sexakula.net:2052

  • www.sexakula.net:2082

Mutex

  • cO2G69Jf8KTX

Attributes
  • delay

    0

  • install

    true

  • install_file

    tefcu.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 2 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a4bdc4eb049b7a468be1559337c4615ef4c2b7ef399ac323b86f904de7314b2.exe
    "C:\Users\Admin\AppData\Local\Temp\9a4bdc4eb049b7a468be1559337c4615ef4c2b7ef399ac323b86f904de7314b2.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3700
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tefcu" /tr '"C:\Users\Admin\AppData\Roaming\tefcu.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2200
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "tefcu" /tr '"C:\Users\Admin\AppData\Roaming\tefcu.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4936
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1D86.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4428
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3412
      • C:\Users\Admin\AppData\Roaming\tefcu.exe
        "C:\Users\Admin\AppData\Roaming\tefcu.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3884
  • C:\Users\Admin\AppData\Roaming\tefcu.exe
    "C:\Users\Admin\AppData\Roaming\tefcu.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:2220

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp1D86.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp1D86.tmp.bat
        • Size 149B
        • SHA256 519e168165da74f08018f44d3f0a79539099a58f68e5427b3cf7092632ae5d3f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tefcu.exe
        • Path C:\Users\Admin\AppData\Roaming\tefcu.exe
        • Size 45KB
        • SHA256 9a4bdc4eb049b7a468be1559337c4615ef4c2b7ef399ac323b86f904de7314b2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2220-10-0x0000000005500000-0x0000000005510000-memory.dmp
        Download

        memory/2220-13-0x0000000005500000-0x0000000005510000-memory.dmp
        Download

        memory/3700-0-0x0000000000320000-0x0000000000332000-memory.dmp
        Download

        memory/3700-1-0x0000000004D30000-0x0000000004D40000-memory.dmp
        Download

        memory/3700-2-0x0000000004D40000-0x0000000004DDC000-memory.dmp
        Download