Analysis

  • max time kernel
    147s
  • max time network
    176s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    15/06/2022, 12:50

General

  • Target
    Fattura numero 93518 del 15.06.2022.xls
  • Size 80KB
  • Sample220615-p2zftaaba4
  • SHA256 6565c2959a8e637f2b0f8463eae7e6e453e830ce1761654aafc757c19e5f0fcb
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    http://byrdnest3.com/cgi-bin/TEq/

  • xlm40.dropper

    http://carbonbros.co.za/logs/KSTJNdxZ73hIZPKddEDT/

  • xlm40.dropper

    http://www.bubblefootballeurope.de/wp-admin/3aMMnYP/

  • xlm40.dropper

    http://casov.com/proxy/kk0OWcstqPOOyeG/

Signatures

  • Process spawned unexpected child process 4 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Fattura numero 93518 del 15.06.2022.xls"
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2008
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\cui1.ocx
      2⤵
      • Process spawned unexpected child process
      PID:888
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\cui2.ocx
      2⤵
      • Process spawned unexpected child process
      PID:428
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\cui3.ocx
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1600
      • C:\Windows\system32\regsvr32.exe
        /S ..\cui3.ocx
        3⤵
        • Loads dropped DLL
        PID:1932
    • C:\Windows\SysWOW64\regsvr32.exe
      C:\Windows\System32\regsvr32.exe /S ..\cui4.ocx
      2⤵
      • Process spawned unexpected child process
      PID:1480

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        cui3.ocx

        • Path C:\Users\Admin\cui3.ocx
        • Size 666KB
        • SHA256 791eec058c0bb722ed2eb0ad7b9e7e34da4df042b09cc19b978a90561ae3e13f
        • MD5 SHA1 SHA512 SSDEEP

        cui3.ocx

        • Path \Users\Admin\cui3.ocx
        • Size 666KB
        • SHA256 791eec058c0bb722ed2eb0ad7b9e7e34da4df042b09cc19b978a90561ae3e13f
        • MD5 SHA1 SHA512 SSDEEP

        cui3.ocx

        • Path \Users\Admin\cui3.ocx
        • Size 666KB
        • SHA256 791eec058c0bb722ed2eb0ad7b9e7e34da4df042b09cc19b978a90561ae3e13f
        • MD5 SHA1 SHA512 SSDEEP

        memory/1932-69-0x000007FEFC521000-0x000007FEFC523000-memory.dmp

        memory/2008-59-0x0000000072CFD000-0x0000000072D08000-memory.dmp

        memory/2008-54-0x000000002F311000-0x000000002F314000-memory.dmp

        memory/2008-58-0x0000000075BF1000-0x0000000075BF3000-memory.dmp

        memory/2008-57-0x0000000072CFD000-0x0000000072D08000-memory.dmp

        memory/2008-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/2008-55-0x0000000071D11000-0x0000000071D13000-memory.dmp