Overview

overview

10

Static

static

10

NursulanCrack.exe

windows10-2004-x64

10

NursulanCrack.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    142s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250410-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250410-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/04/2025, 10:58

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General

  • Target

    NursulanCrack.exe

  • Size

    63KB

  • MD5

    45a29490589e6635ab2734cf38e47c62

  • SHA1

    69aa8013c4ed1616442077aa4995f4cb1f209cee

  • SHA256

    dbbc3b014153cb0742cc5386136f347b3ad61eb539524d8e925a8a28a23cc73d

  • SHA512

    e67d536411faf00e9f62ac6a39991902641bba38e54c6c2581251300545b52177ac35647a1d2e4f502a9864d722ba21ca5b14184a6abf518256397d9570354bd

  • SSDEEP

    768:O1fwJdXHF378LAC8A+XPfXssq8nXhllT9SzGo1+T4/SBGHmDbDFpP0oXNMJSuxkP:kUFBXn9TUzRcYUb3P9mguxkpqKmY7

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:3232

Attributes
  • delay

    2

  • install

    true

  • install_file

    Nursulan cRack.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

    ratasyncrat
  • Asyncrat family
    asyncrat
  • Async RAT payload 1 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 10 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\NursulanCrack.exe
    "C:\Users\Admin\AppData\Local\Temp\NursulanCrack.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3780
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Nursulan cRack" /tr '"C:\Users\Admin\AppData\Roaming\Nursulan cRack.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4192
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Nursulan cRack" /tr '"C:\Users\Admin\AppData\Roaming\Nursulan cRack.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4968
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp71F4.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4812
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:5028
      • C:\Users\Admin\AppData\Roaming\Nursulan cRack.exe
        "C:\Users\Admin\AppData\Roaming\Nursulan cRack.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2040

Network

MITRE ATT&CK Enterprise v16

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp71F4.tmp.bat
    Filesize

    158B

    MD5

    7576391c8d6c2df5e59d53d2ec32863f

    SHA1

    835bb260642b1e6f882d4f65148fec1eb81351e9

    SHA256

    af6119f3f7024da09ab888e408246cc1b0b78d1902303cd1ff3e428f65d10c24

    SHA512

    30d40a6c6cd9edaaf3adb075923c80a185e9f4c83b902ddee73bab08c868b634a7d5762d62605863ab0a87131dc4cbd98dfa57d8f944a9740a3ff72f3dba3176

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Nursulan cRack.exe
    Filesize

    63KB

    MD5

    45a29490589e6635ab2734cf38e47c62

    SHA1

    69aa8013c4ed1616442077aa4995f4cb1f209cee

    SHA256

    dbbc3b014153cb0742cc5386136f347b3ad61eb539524d8e925a8a28a23cc73d

    SHA512

    e67d536411faf00e9f62ac6a39991902641bba38e54c6c2581251300545b52177ac35647a1d2e4f502a9864d722ba21ca5b14184a6abf518256397d9570354bd

    Download Submit

  • memory/3780-1-0x0000000000B80000-0x0000000000B96000-memory.dmp

    Filesize

    88KB

    Download

  • memory/3780-0-0x00007FFD86CA3000-0x00007FFD86CA5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/3780-2-0x00007FFD86CA0000-0x00007FFD87761000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3780-8-0x00007FFD86CA0000-0x00007FFD87761000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3780-7-0x00007FFD86CA0000-0x00007FFD87761000-memory.dmp

    Filesize

    10.8MB

    Download