Analysis

  • max time kernel
    146s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21/03/2023, 14:31

General

  • Target

    9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe

  • Size

    309KB

  • MD5

    66b5dabec55deb65ac6ecdbb385c9181

  • SHA1

    8485dc1ecf501916e3850521e81112fccdfaa110

  • SHA256

    9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138

  • SHA512

    28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8

  • SSDEEP

    3072:WHuQETR+J2IoYcOXb/CPJDjSIU1dA+h9b3dA2/S1dAK3dA/Sf6CwCPuikC0oXz2T:ouQ1MIPXXbaQIDp5OqfO

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:1177

jntrojan.ddns.net:6606

jntrojan.ddns.net:7707

jntrojan.ddns.net:8808

jntrojan.ddns.net:1177

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    windows.exe

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe
    "C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1760
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:920
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "windows" /tr '"C:\Users\Admin\AppData\Local\Temp\windows.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1392
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2897.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:588
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:332
      • C:\Users\Admin\AppData\Local\Temp\windows.exe
        "C:\Users\Admin\AppData\Local\Temp\windows.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1920

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp2897.tmp.bat

          Filesize

          154B

          MD5

          e8f52cec60c6a7a1325e955624099193

          SHA1

          386f4778e674427fe9de89759eb3f5bcc21947f6

          SHA256

          689e27e3f714280de322bd5585f81a7d50000c0f486baca154eacfd4f0aa8820

          SHA512

          9beaac2f5c93524b82894fe7861358281ff4f4d5ac4cf69de32730d277ab819827fb588d66f8b884d4a7fff93b662ba098b67fb039d7381a7bdfec7114565c5b

        • C:\Users\Admin\AppData\Local\Temp\tmp2897.tmp.bat

          Filesize

          154B

          MD5

          e8f52cec60c6a7a1325e955624099193

          SHA1

          386f4778e674427fe9de89759eb3f5bcc21947f6

          SHA256

          689e27e3f714280de322bd5585f81a7d50000c0f486baca154eacfd4f0aa8820

          SHA512

          9beaac2f5c93524b82894fe7861358281ff4f4d5ac4cf69de32730d277ab819827fb588d66f8b884d4a7fff93b662ba098b67fb039d7381a7bdfec7114565c5b

        • C:\Users\Admin\AppData\Local\Temp\windows.exe

          Filesize

          309KB

          MD5

          66b5dabec55deb65ac6ecdbb385c9181

          SHA1

          8485dc1ecf501916e3850521e81112fccdfaa110

          SHA256

          9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138

          SHA512

          28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8

        • C:\Users\Admin\AppData\Local\Temp\windows.exe

          Filesize

          309KB

          MD5

          66b5dabec55deb65ac6ecdbb385c9181

          SHA1

          8485dc1ecf501916e3850521e81112fccdfaa110

          SHA256

          9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138

          SHA512

          28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8

        • \Users\Admin\AppData\Local\Temp\windows.exe

          Filesize

          309KB

          MD5

          66b5dabec55deb65ac6ecdbb385c9181

          SHA1

          8485dc1ecf501916e3850521e81112fccdfaa110

          SHA256

          9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138

          SHA512

          28ff7068f0d8c1d7e0de8a6129d64db7d566868dc93e9bb8ba4de737d11483f8dd52edc6f67799cdf3396109061835bce472a2123477bb9304f1ff902ffdffb8

        • memory/1760-54-0x0000000001190000-0x00000000011E4000-memory.dmp

          Filesize

          336KB

        • memory/1760-55-0x0000000000C30000-0x0000000000C70000-memory.dmp

          Filesize

          256KB

        • memory/1920-68-0x0000000001130000-0x0000000001184000-memory.dmp

          Filesize

          336KB

        • memory/1920-69-0x0000000000370000-0x00000000003B0000-memory.dmp

          Filesize

          256KB

        • memory/1920-70-0x0000000000370000-0x00000000003B0000-memory.dmp

          Filesize

          256KB