Analysis

  • max time kernel
    140s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    04-02-2024 02:17

General

  • Target

    8df8c579fd804944150aa3e2d11c4752.exe

  • Size

    727KB

  • MD5

    8df8c579fd804944150aa3e2d11c4752

  • SHA1

    44ddcb5413f60619139d2a2bb30711f1a5606f56

  • SHA256

    04f21d0ee0165c994d0cbfad13e8c0b67d858a51d9f70b97008c022a5ee9d80f

  • SHA512

    773b74d1b9742e33401804c87708e440f02355b1edab4c56f9a899174e3aa59c5a693c7b7de5fa846aa657942e4cebda57626794886e3f1bb480721af9514b64

  • SSDEEP

    6144:51db49+rEg024fpLZazEjvE/rbay19tSt4bO2BaDmeBJe59zP8HzinW9eIVh6nlt:5jkArEN249AyE/rbaMct4bO2/Vzp7J6

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Drops startup file 1 IoCs
  • UPX packed file 12 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

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

  • AutoIT Executable 10 IoCs

    AutoIT scripts compiled to PE executables.

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

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

  • Modifies Internet Explorer settings 1 TTPs 17 IoCs
  • Modifies Internet Explorer start page 1 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8df8c579fd804944150aa3e2d11c4752.exe
    "C:\Users\Admin\AppData\Local\Temp\8df8c579fd804944150aa3e2d11c4752.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Drops startup file
    • Adds Run key to start application
    • Enumerates connected drives
    • 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:2496
    • 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\SysWOW64\system32_.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2820
      • C:\Windows\SysWOW64\at.exe
        AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\SysWOW64\system32_.exe
        3⤵
          PID:2736
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /C AT /delete /yes
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2208
      • 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:1252
        • C:\Windows\SysWOW64\cacls.exe
          cacls "C:\system volume information" /e /g "Admin":f
          3⤵
            PID:1892
        • 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:1256
          • C:\Windows\SysWOW64\cacls.exe
            cacls "C:\system volume information" /e /g "Admin":f
            3⤵
              PID:1784
        • C:\Windows\SysWOW64\at.exe
          AT /delete /yes
          1⤵
            PID:2788

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Windows\system32_.exe

            Filesize

            727KB

            MD5

            8df8c579fd804944150aa3e2d11c4752

            SHA1

            44ddcb5413f60619139d2a2bb30711f1a5606f56

            SHA256

            04f21d0ee0165c994d0cbfad13e8c0b67d858a51d9f70b97008c022a5ee9d80f

            SHA512

            773b74d1b9742e33401804c87708e440f02355b1edab4c56f9a899174e3aa59c5a693c7b7de5fa846aa657942e4cebda57626794886e3f1bb480721af9514b64

          • memory/2496-0-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-71-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-72-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-73-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-77-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-78-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-79-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-82-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-83-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-84-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB

          • memory/2496-85-0x0000000000400000-0x0000000000599000-memory.dmp

            Filesize

            1.6MB