Resubmissions

30/04/2023, 21:56

230430-1tvcnsfb3y 10

30/04/2023, 21:52

230430-1q9yyseh7w 10

Analysis

  • max time kernel
    1802s
  • max time network
    1808s
  • platform
    windows10-1703_x64
  • resource
    win10-20230220-en
  • resource tags

    arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
  • submitted
    30/04/2023, 21:56

General

  • Target

    Swiftfn.exe

  • Size

    47KB

  • MD5

    25d7952b3e8c9f0872ecf4f099cea1a2

  • SHA1

    976e307d3fc015452e70acd29ebddef0d8823fac

  • SHA256

    7fb468df5b46d1eb0f26e737c515a5a10794b84c9193628efb71c9c32fe8edc1

  • SHA512

    f81102833efd450be231d238f3065cf3d5cb9ae6c60f0a4e6b057ffd4c78a2767b0fd8aff54e0bb08ebdf5b5da293f622e68c4874776f0fa25adfd639ca4f3eb

  • SSDEEP

    768:sJCO9ILoeck+riPUl5kJN/QisVF8YbWgTgDaJivEgK/JDqVc6KN:sJ588kqFzbJga4nkJDqVclN

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

dom45x.duckdns.org:62180

Mutex

DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    Runtime Broker.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 3 IoCs
  • Executes dropped EXE 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 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Swiftfn.exe
    "C:\Users\Admin\AppData\Local\Temp\Swiftfn.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpCC0F.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3508
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4056
      • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe
        "C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2900
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2992
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Runtime Broker" /tr '"C:\Users\Admin\AppData\Roaming\Runtime Broker.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:3952

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpCC0F.tmp.bat

          Filesize

          158B

          MD5

          8e322549befedb27d4334ad06fa57de7

          SHA1

          b5b5ba07e644a61180b845fad3dfd1cb4c689e92

          SHA256

          b8fa7516cec8a3a7a022663e8b67e86fa785a38abb65c3fcd60a77777783cd51

          SHA512

          839d4c7727c9558fdd3be074637432602f252af7518ce5b8a396aafc0be52bc34c88f35e4b3fea68f94e9dc7d347f068acc7411ba05360dd679445336ea471bf

        • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe

          Filesize

          47KB

          MD5

          25d7952b3e8c9f0872ecf4f099cea1a2

          SHA1

          976e307d3fc015452e70acd29ebddef0d8823fac

          SHA256

          7fb468df5b46d1eb0f26e737c515a5a10794b84c9193628efb71c9c32fe8edc1

          SHA512

          f81102833efd450be231d238f3065cf3d5cb9ae6c60f0a4e6b057ffd4c78a2767b0fd8aff54e0bb08ebdf5b5da293f622e68c4874776f0fa25adfd639ca4f3eb

        • C:\Users\Admin\AppData\Roaming\Runtime Broker.exe

          Filesize

          47KB

          MD5

          25d7952b3e8c9f0872ecf4f099cea1a2

          SHA1

          976e307d3fc015452e70acd29ebddef0d8823fac

          SHA256

          7fb468df5b46d1eb0f26e737c515a5a10794b84c9193628efb71c9c32fe8edc1

          SHA512

          f81102833efd450be231d238f3065cf3d5cb9ae6c60f0a4e6b057ffd4c78a2767b0fd8aff54e0bb08ebdf5b5da293f622e68c4874776f0fa25adfd639ca4f3eb

        • memory/2488-121-0x00000000000B0000-0x00000000000C2000-memory.dmp

          Filesize

          72KB

        • memory/2488-122-0x000000001ACB0000-0x000000001ACC0000-memory.dmp

          Filesize

          64KB

        • memory/2900-131-0x000000001B5F0000-0x000000001B600000-memory.dmp

          Filesize

          64KB

        • memory/2900-134-0x000000001B5F0000-0x000000001B600000-memory.dmp

          Filesize

          64KB