Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/06/2024, 01:53

General

  • Target
    b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22.exe
  • Size 10.9MB
  • Sample240614-cbbkvavckj
  • SHA256 b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Version
  • | Edit by Vinom Rat

Botnet
  • 2026

C2
  • newws.eu:2005

Mutex
  • AsyncMutex_ruiewDFG4

Attributes
  • delay

    3

  • install

    false

  • install_file

    zz.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 1 IoCs
  • Detects file containing reversed ASEP Autorun registry keys 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 34 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Detects Pyinstaller 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22.exe
    "C:\Users\Admin\AppData\Local\Temp\b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4872
    • C:\Users\Admin\AppData\Local\Temp\b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22.exe
      "C:\Users\Admin\AppData\Local\Temp\b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22.exe"
      2⤵
      • Checks computer location settings
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4880
      • C:\Users\Admin\AppData\Local\Microsoft\MyApp.exe
        "C:\Users\Admin\AppData\Local\Microsoft\MyApp.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:3012
        • C:\Users\Admin\AppData\Local\Microsoft\MyApp.exe
          "C:\Users\Admin\AppData\Local\Microsoft\MyApp.exe"
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4708
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            PID:4604

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        MyApp.exe

        • Path C:\Users\Admin\AppData\Local\Microsoft\MyApp.exe
        • Size 10.9MB
        • SHA256 b1f2068201c29f3b00aeedc0911498043d7c204a860ca16b3fef47fc19fc2b22
        • MD5 SHA1 SHA512 SSDEEP

        top_level.txt

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI30122\pip-22.3.dist-info\top_level.txt
        • Size 4B
        • SHA256 ceebae7b8927a3227e5303cf5e0f1f7b34bb542ad7250ac03fbcde36ec2f1508
        • MD5 SHA1 SHA512

        VCRUNTIME140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\VCRUNTIME140.dll
        • Size 85KB
        • SHA256 3096cafb6a21b6d28cf4fe2dd85814f599412c0fe1ef090dd08d1c03affe9ab6
        • MD5 SHA1 SHA512 SSDEEP

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\_bz2.pyd
        • Size 92KB
        • SHA256 8bce02e8d44003c5301608b1722f7e26aada2a03d731fa92a48c124db40e2e41
        • MD5 SHA1 SHA512 SSDEEP

        _cffi_backend.cp37-win_amd64.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\_cffi_backend.cp37-win_amd64.pyd
        • Size 177KB
        • SHA256 b714423d9cad42e67937531f2634001a870f8be2bf413eacfc9f73ef391a7915
        • MD5 SHA1 SHA512 SSDEEP

        _ctypes.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\_ctypes.pyd
        • Size 129KB
        • SHA256 430f1886caf059f05cde6eb2e8d96feb25982749a151231e471e4b8d7f54f173
        • MD5 SHA1 SHA512 SSDEEP

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\_hashlib.pyd
        • Size 38KB
        • SHA256 ca4f433a68c3921526f31f46d8a45709b946bbd40f04a4cfc6c245cb9ee0eab5
        • MD5 SHA1 SHA512 SSDEEP

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\_lzma.pyd
        • Size 172KB
        • SHA256 f9bc6036d9e4d57d08848418367743fb608434c04434ab07da9dabe4725f9a9b
        • MD5 SHA1 SHA512 SSDEEP

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\_socket.pyd
        • Size 75KB
        • SHA256 9822c258a9d25062e51eafc45d62ed19722e0450a212668f6737eb3bfe3a41c2
        • MD5 SHA1 SHA512 SSDEEP

        base_library.zip

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\base_library.zip
        • Size 1000KB
        • SHA256 2eea4b6202a6a6f61cb4d75c78be5ec2e1052897f54973797885f2c3b24d202c
        • MD5 SHA1 SHA512 SSDEEP

        ClrLoader.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\clr_loader\ffi\dlls\amd64\ClrLoader.dll
        • Size 8KB
        • SHA256 4942106eb2b86a37c63eba972a2c6c5870d4ae7535075bb5252556e2ff2357f6
        • MD5 SHA1 SHA512 SSDEEP

        libcrypto-1_1.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\libcrypto-1_1.dll
        • Size 3.2MB
        • SHA256 594303e2ce6a4a02439054c84592791bf4ab0b7c12e9bbdb4b040e27251521f1
        • MD5 SHA1 SHA512 SSDEEP

        pyexpat.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\pyexpat.pyd
        • Size 198KB
        • SHA256 752cf6804aac09480bf1e839a26285ec2668405010ed7ffd2021596e49b94dec
        • MD5 SHA1 SHA512 SSDEEP

        python37.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\python37.dll
        • Size 3.6MB
        • SHA256 ca8e39f2b1d277b0a24a43b5b8eada5baf2de97488f7ef2484014df6e270b3f3
        • MD5 SHA1 SHA512 SSDEEP

        Python.Runtime.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\pythonnet\runtime\Python.Runtime.dll
        • Size 421KB
        • SHA256 22822869023482e6d15314a8cbd7cb700e5c1ef4d89ecff65ff4144b1840da79
        • MD5 SHA1 SHA512 SSDEEP

        pythoncom37.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\pywin32_system32\pythoncom37.dll
        • Size 680KB
        • SHA256 1dd7f1beb75529a090e8157bac0cac3c55ed49579b48d8bcab6fc756931662fb
        • MD5 SHA1 SHA512 SSDEEP

        pywintypes37.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\pywin32_system32\pywintypes37.dll
        • Size 133KB
        • SHA256 47cfa248363c3e5e3c2fcd847bd73435890bac14c3403f2841fd5e138f936869
        • MD5 SHA1 SHA512 SSDEEP

        select.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\select.pyd
        • Size 26KB
        • SHA256 65a3c8806d456e9df2211051ed808a087a96c94d38e23d43121ac120b4d36429
        • MD5 SHA1 SHA512 SSDEEP

        win32api.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI48722\win32\win32api.pyd
        • Size 136KB
        • SHA256 e86a8623f4532645419bd753baf239c77198a51c0663d5441ad6e8b56093f530
        • MD5 SHA1 SHA512 SSDEEP

        memory/4604-261-0x0000000004F70000-0x0000000004F7A000-memory.dmp

        memory/4604-260-0x00000000051C0000-0x0000000005252000-memory.dmp

        memory/4604-259-0x0000000005670000-0x0000000005C14000-memory.dmp

        memory/4604-226-0x0000000000400000-0x0000000000416000-memory.dmp

        memory/4708-225-0x000001F1BB0F0000-0x000001F1BB124000-memory.dmp

        memory/4708-224-0x00007FFBAED10000-0x00007FFBAED1A000-memory.dmp

        memory/4880-88-0x000001A95E130000-0x000001A95E1A0000-memory.dmp

        memory/4880-91-0x000001A945BD0000-0x000001A945BD8000-memory.dmp

        memory/4880-94-0x000001A945DA0000-0x000001A945DB0000-memory.dmp

        memory/4880-95-0x00007FFB97A10000-0x00007FFB984D1000-memory.dmp

        memory/4880-96-0x000001A945D70000-0x000001A945D78000-memory.dmp

        memory/4880-97-0x00007FFB97A10000-0x00007FFB984D1000-memory.dmp

        memory/4880-98-0x000001A95E170000-0x000001A95E1A4000-memory.dmp

        memory/4880-99-0x00007FFB97A10000-0x00007FFB984D1000-memory.dmp

        memory/4880-92-0x000001A95E250000-0x000001A95E272000-memory.dmp

        memory/4880-93-0x00007FFB97A10000-0x00007FFB984D1000-memory.dmp

        memory/4880-145-0x00007FFB97A10000-0x00007FFB984D1000-memory.dmp

        memory/4880-90-0x000001A945BA0000-0x000001A945BA8000-memory.dmp

        memory/4880-89-0x000001A945BB0000-0x000001A945BCA000-memory.dmp

        memory/4880-84-0x000001A945B50000-0x000001A945B5A000-memory.dmp

        memory/4880-85-0x00007FFBAED10000-0x00007FFBAED1A000-memory.dmp

        memory/4880-86-0x00007FFB97A13000-0x00007FFB97A15000-memory.dmp

        memory/4880-81-0x000001A945DA0000-0x000001A945DB0000-memory.dmp