Analysis

  • max time kernel
    146s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/03/2023, 13:26

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 3 IoCs
  • 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). 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 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe
    "C:\Users\Admin\AppData\Local\Temp\9a8f8b44910d4c35a64244354966ce7bdd3bdff9189feee1d8e98b094c855138.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4828
    • 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:3720
      • 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:1432
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDA57.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:116
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:5048
      • 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:4456

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpDA57.tmp.bat

          Filesize

          154B

          MD5

          5ff62692c72c2ccb98f75a5a5e62aa97

          SHA1

          10ce1835590bd1de7e07429203faf59f2207f395

          SHA256

          7fe4d7689d052fa576c1c61198a0db0a9f714912ac71ad8a597654560e4f7760

          SHA512

          7e44282136a8b591239990e65b02251299a8c4e5355014dfa0f6c6f3f8604faf6a5c55179b1ae9724bb49c4a05b6b68e0b5e208de632bdd18f3034c9e7714b33

        • 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

        • memory/4456-144-0x0000000005440000-0x0000000005450000-memory.dmp

          Filesize

          64KB

        • memory/4456-145-0x0000000005440000-0x0000000005450000-memory.dmp

          Filesize

          64KB

        • memory/4828-133-0x00000000003B0000-0x0000000000404000-memory.dmp

          Filesize

          336KB

        • memory/4828-134-0x0000000004EB0000-0x0000000004EC0000-memory.dmp

          Filesize

          64KB

        • memory/4828-135-0x00000000050C0000-0x000000000515C000-memory.dmp

          Filesize

          624KB