Analysis

  • max time kernel
    147s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-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 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 23 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:3472
    • 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:936
      • 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:4780
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCF0D.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3636
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4832
      • 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:4956

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpCF0D.tmp.bat

          Filesize

          154B

          MD5

          cf040bb5d517261895df2158073d1186

          SHA1

          29f571645efcf8c0d9a6aeb4003be155e14fbbf0

          SHA256

          2d340771ba16433d9dffeb26d3aab4202a20938f787adcc4fd3d2aac09ddf58e

          SHA512

          a4591a6c3e99a98411601f98d55fd8edd2225341837b488f8b96cc914fd5dd7e0e0ba3747740a2eb93c7b65eabfb0607dce4e788cae6ae22f3aba63d1f111327

        • 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/3472-133-0x00000000008F0000-0x0000000000944000-memory.dmp

          Filesize

          336KB

        • memory/3472-134-0x00000000052D0000-0x00000000052E0000-memory.dmp

          Filesize

          64KB

        • memory/3472-135-0x00000000053E0000-0x000000000547C000-memory.dmp

          Filesize

          624KB

        • memory/3472-136-0x00000000052D0000-0x00000000052E0000-memory.dmp

          Filesize

          64KB

        • memory/4956-145-0x0000000002960000-0x0000000002970000-memory.dmp

          Filesize

          64KB

        • memory/4956-146-0x0000000002960000-0x0000000002970000-memory.dmp

          Filesize

          64KB