Analysis

  • max time kernel
    161s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-10-2022 16:58

General

  • Target

    b344b36a1a0287f0dc75e11d1f2dfc8438ce6c0937b6b53d0fb2fe41d5ba7879.exe

  • Size

    282KB

  • MD5

    054ad5b07f6eb862bf1ac051588ee130

  • SHA1

    12e4f42623cb38bdb14d5c304b81ce8506972d14

  • SHA256

    b344b36a1a0287f0dc75e11d1f2dfc8438ce6c0937b6b53d0fb2fe41d5ba7879

  • SHA512

    c3e34a716774f7c030089c46db64787abe84df5190d8e736a286ec50cd8cd71195a1d916e47152afebb0c6891dfbd69cf91a8e70628d89e8badb3be277f7520f

  • SSDEEP

    6144:4YZTNk3D6LyUXwLLk+cR3qh0GQ43VJRD0ew+/UO7BK:4SNC80I+cR3R03VseuOtK

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops autorun.inf file 1 TTPs 1 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 3 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies Internet Explorer settings 1 TTPs 5 IoCs
  • Modifies Internet Explorer start page 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b344b36a1a0287f0dc75e11d1f2dfc8438ce6c0937b6b53d0fb2fe41d5ba7879.exe
    "C:\Users\Admin\AppData\Local\Temp\b344b36a1a0287f0dc75e11d1f2dfc8438ce6c0937b6b53d0fb2fe41d5ba7879.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops autorun.inf file
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies Internet Explorer start page
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5052
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /C AT /delete /yes
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4932
      • C:\Windows\SysWOW64\at.exe
        AT /delete /yes
        3⤵
          PID:4356
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\chrome.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4804
        • C:\Windows\SysWOW64\at.exe
          AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\chrome.exe
          3⤵
            PID:4124
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /C cacls "C:\system volume information" /e /g "Admin":f
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:2556
          • C:\Windows\SysWOW64\cacls.exe
            cacls "C:\system volume information" /e /g "Admin":f
            3⤵
              PID:4224

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/2556-138-0x0000000000000000-mapping.dmp

        • memory/4124-137-0x0000000000000000-mapping.dmp

        • memory/4224-139-0x0000000000000000-mapping.dmp

        • memory/4356-135-0x0000000000000000-mapping.dmp

        • memory/4804-136-0x0000000000000000-mapping.dmp

        • memory/4932-134-0x0000000000000000-mapping.dmp

        • memory/5052-132-0x0000000000400000-0x00000000004AF000-memory.dmp

          Filesize

          700KB

        • memory/5052-133-0x0000000000400000-0x00000000004AF000-memory.dmp

          Filesize

          700KB