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Analysis

  • max time kernel
    143s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    31/12/2023, 04:45

General

  • Target

    28b84dca448ab58fa3a35940a125f7d4.exe

  • Size

    512KB

  • MD5

    28b84dca448ab58fa3a35940a125f7d4

  • SHA1

    9ce6b74321a985ee2ca0888147eab15796a6c013

  • SHA256

    6e8742ca1f6c692bfa9933281637d47aaf08b77909a51629fcfa60d87a1b4e1b

  • SHA512

    d019b108fab6c3b87a8cfae2f78e29288a14f0842686ec0bc4388109d8cafc0444c5763858c72208848846e5338e5780f0254160793b10245df4066922dadeda

  • SSDEEP

    6144:1VY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bcodj6H:1gDhdkq5BCoC5LfWSLTUQpr2Zu19Qm5g

Malware Config

Signatures

  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 5 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Windows security modification 2 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Enumerates connected drives 3 TTPs 64 IoCs

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

  • Modifies WinLogon 2 TTPs 2 IoCs
  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 9 IoCs
  • Drops file in Program Files directory 15 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of FindShellTrayWindow 18 IoCs
  • Suspicious use of SendNotifyMessage 18 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\28b84dca448ab58fa3a35940a125f7d4.exe
    "C:\Users\Admin\AppData\Local\Temp\28b84dca448ab58fa3a35940a125f7d4.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2116
    • C:\Windows\SysWOW64\rhavxjrtpu.exe
      rhavxjrtpu.exe
      2⤵
      • Modifies visibility of file extensions in Explorer
      • Modifies visiblity of hidden/system files in Explorer
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Loads dropped DLL
      • Windows security modification
      • Enumerates connected drives
      • Modifies WinLogon
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2784
      • C:\Windows\SysWOW64\stdhtsyj.exe
        C:\Windows\system32\stdhtsyj.exe
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2640
    • C:\Windows\SysWOW64\xwojwzaozegffgs.exe
      xwojwzaozegffgs.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2652
    • C:\Windows\SysWOW64\blyqlfwiheetf.exe
      blyqlfwiheetf.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2264
    • C:\Windows\SysWOW64\stdhtsyj.exe
      stdhtsyj.exe
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2796
    • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Windows\mydoc.rtf"
      2⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2036
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:2576

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm

      Filesize

      20KB

      MD5

      5e1bb6b97f7f714324f518189e4ea9be

      SHA1

      73be57396cb173f3aebf54c41536bf28404a6f75

      SHA256

      9c7decb339a9bbdb401191e38e66ca9f2079651ce4a602d311d4c6d263157abe

      SHA512

      9875c2000c085f485f5b8031ff1d49cf36e2f02ea7b11d201486af87508321b2ab749c81ce90c087e7b8cf91f9cc3e01297a601ca0b740d300dfb9bace6b137d

    • memory/2036-45-0x000000002F0C1000-0x000000002F0C2000-memory.dmp

      Filesize

      4KB

    • memory/2036-46-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2036-47-0x00000000715AD000-0x00000000715B8000-memory.dmp

      Filesize

      44KB

    • memory/2036-83-0x00000000715AD000-0x00000000715B8000-memory.dmp

      Filesize

      44KB

    • memory/2036-104-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/2116-0-0x0000000000400000-0x0000000000496000-memory.dmp

      Filesize

      600KB