Overview

overview

10

Static

static

d3e8bacfa3...a9.exe

windows7_x64

10

d3e8bacfa3...a9.exe

windows10_x64

10

Analysis

  • max time kernel
    140s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    24/05/2021, 10:31

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General

  • Target
    d3e8bacfa3a35f43a26772be547d48a9.exe
  • Size 14.1MB
  • Sample210524-qppzed5a8a
  • SHA256 7b579694a738437eb6aed2064bd2d78cb77d8afe92994bf6e02016a563cd50a3
  • MD5 SHA1 SHA512
Score
10/10
asyncratrat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.7B

C2

  • 81.163.246.9:5020

Mutex

  • AsyncMutex_6SI8OkPnk

Attributes
  • aes_key

    H3XOkf5xclZtUY6prd4SD8X3oarIoAqU

  • anti_detection

    true

  • autorun

    false

  • bdos

    true

  • delay

    Default

  • host

    81.163.246.9

  • hwid

    3

  • install_file

  • install_folder

    %AppData%

  • mutex

    AsyncMutex_6SI8OkPnk

  • pastebin_config

    null

  • port

    5020

  • version

    0.5.7B

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

    ratasyncrat
  • Async RAT payload 2 IoCs
    rat
  • Executes dropped EXE 4 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.

    persistence
  • Modifies registry class 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d3e8bacfa3a35f43a26772be547d48a9.exe
    "C:\Users\Admin\AppData\Local\Temp\d3e8bacfa3a35f43a26772be547d48a9.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:740
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cript.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cript.exe"
      2⤵
      • Executes dropped EXE
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:344
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Driverdll\ssbT9GVu.vbe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:212
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Driverdll\jZWXmLWSCTcFHfd1q.bat" "
          4⤵
            PID:1856
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRaR64.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\WinRaR64.exe"
        2⤵
        • Executes dropped EXE
        • NTFS ADS
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:1960
        • C:\Users\Admin\AppData\Local\Temp\CL_Debug_Log.txt
          C:\Users\Admin\AppData\Local\Temp\CL_Debug_Log.txt e -p"JDQJndnqwdnqw2139dn21n3b312idDQDB" "C:\Users\Admin\AppData\Local\Temp\CR_Debug_Log.txt" -o"C:\Users\Admin\AppData\Local\Temp\"
          3⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:3560
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c schtasks.exe /Create /XML "C:\Users\Admin\AppData\Local\Temp\SystemCheck.xml" /TN "System\SystemCheck"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3420
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks.exe /Create /XML "C:\Users\Admin\AppData\Local\Temp\SystemCheck.xml" /TN "System\SystemCheck"
            4⤵
            • Creates scheduled task(s)
            PID:3796
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\Async.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Async.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:3316

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1960-133-0x0000000005250000-0x0000000005251000-memory.dmp
          Download

          memory/3316-141-0x0000000000F20000-0x0000000000F21000-memory.dmp
          Download

          memory/3316-143-0x0000000005780000-0x0000000005781000-memory.dmp
          Download

          memory/3316-144-0x0000000005810000-0x0000000005811000-memory.dmp
          Download

          memory/3316-145-0x0000000005CA0000-0x0000000005CA1000-memory.dmp
          Download