Analysis

  • max time kernel
    85s
  • max time network
    86s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    26/04/2023, 18:44

General

  • Target

    AsyncClient.exe

  • Size

    45KB

  • MD5

    dcfb73959b8a575a7f5765bb0723a861

  • SHA1

    b9757ac469bc18714e7c138094bd461707ff80c5

  • SHA256

    afbe39d83050f54ca4cdaca312b52475f70389dd7f906653c5869f4db914c85a

  • SHA512

    c2f4a52227ae66263266c41d7cd5823c0ded669fddec194b1c5f47d8be95851dd359da887a60f9d8a7e7a63f17f4e95e24e4ea7a1ee087925a7bbdad04f43090

  • SSDEEP

    768:3uyRNTAoZjRWUJs9bmo2qL7KjGKG6PIyzjbFgX3i+ETtzcHmjBEgmyBDZzx:3uyRNTAGo2WKYDy3bCXS+camjBndzx

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

181.ip.ply.gg:5050

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 6 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).

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:468
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:992
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1D61.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:668
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2008
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1388
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x488
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:280

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp1D61.tmp.bat

          Filesize

          151B

          MD5

          70369098f2268d004590a27073230e35

          SHA1

          396210dc2268c06145aa1b29ecb61e43d18284b7

          SHA256

          b8d8d7a0bdf51fd783955f27a13ab994d20a9a3f1910a0dd7b61b27312060ccd

          SHA512

          071484875da067cde8f6879ff2d073a6347e2365e400b07771a4bf1672d9f3fe9f5b459aeeb790b1a26336fd84679b122487769d449115bfc932e022bfdbbf74

        • C:\Users\Admin\AppData\Local\Temp\tmp1D61.tmp.bat

          Filesize

          151B

          MD5

          70369098f2268d004590a27073230e35

          SHA1

          396210dc2268c06145aa1b29ecb61e43d18284b7

          SHA256

          b8d8d7a0bdf51fd783955f27a13ab994d20a9a3f1910a0dd7b61b27312060ccd

          SHA512

          071484875da067cde8f6879ff2d073a6347e2365e400b07771a4bf1672d9f3fe9f5b459aeeb790b1a26336fd84679b122487769d449115bfc932e022bfdbbf74

        • C:\Users\Admin\AppData\Roaming\svchost.exe

          Filesize

          45KB

          MD5

          dcfb73959b8a575a7f5765bb0723a861

          SHA1

          b9757ac469bc18714e7c138094bd461707ff80c5

          SHA256

          afbe39d83050f54ca4cdaca312b52475f70389dd7f906653c5869f4db914c85a

          SHA512

          c2f4a52227ae66263266c41d7cd5823c0ded669fddec194b1c5f47d8be95851dd359da887a60f9d8a7e7a63f17f4e95e24e4ea7a1ee087925a7bbdad04f43090

        • C:\Users\Admin\AppData\Roaming\svchost.exe

          Filesize

          45KB

          MD5

          dcfb73959b8a575a7f5765bb0723a861

          SHA1

          b9757ac469bc18714e7c138094bd461707ff80c5

          SHA256

          afbe39d83050f54ca4cdaca312b52475f70389dd7f906653c5869f4db914c85a

          SHA512

          c2f4a52227ae66263266c41d7cd5823c0ded669fddec194b1c5f47d8be95851dd359da887a60f9d8a7e7a63f17f4e95e24e4ea7a1ee087925a7bbdad04f43090

        • \Users\Admin\AppData\Roaming\svchost.exe

          Filesize

          45KB

          MD5

          dcfb73959b8a575a7f5765bb0723a861

          SHA1

          b9757ac469bc18714e7c138094bd461707ff80c5

          SHA256

          afbe39d83050f54ca4cdaca312b52475f70389dd7f906653c5869f4db914c85a

          SHA512

          c2f4a52227ae66263266c41d7cd5823c0ded669fddec194b1c5f47d8be95851dd359da887a60f9d8a7e7a63f17f4e95e24e4ea7a1ee087925a7bbdad04f43090

        • memory/1388-68-0x00000000003D0000-0x00000000003E2000-memory.dmp

          Filesize

          72KB

        • memory/1388-69-0x0000000004D70000-0x0000000004DB0000-memory.dmp

          Filesize

          256KB

        • memory/1388-70-0x0000000004D70000-0x0000000004DB0000-memory.dmp

          Filesize

          256KB

        • memory/2036-54-0x00000000010A0000-0x00000000010B2000-memory.dmp

          Filesize

          72KB

        • memory/2036-55-0x0000000004D40000-0x0000000004D80000-memory.dmp

          Filesize

          256KB