Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 15:48

General

  • Target
    b26ae85e1ae3c86b2a7d7c11390a4113.xls
  • Size 118KB
  • Sample220111-s8r7vsgbc7
  • SHA256 dda6bd51ff45aa0e3b4e72d47460f7a78c5bb0bc0f1c43d09a20c88b01b6f851
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    https://wordpressdes.vanzolini-gte.org.br/fundacaotelefonica.org.br/gAbC4QpJYI/

Signatures

  • Emotet

    Emotet is a trojan that is primarily spread through spam emails.

  • Process spawned unexpected child process 1 IoCs

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

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 28 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\b26ae85e1ae3c86b2a7d7c11390a4113.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:1756
    • C:\Windows\SysWow64\rundll32.exe
      C:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1788
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Qeuorvoknqyuzj\aldccgrbrwlh.omp",hOyVsTToRMAD
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1740
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Qeuorvoknqyuzj\aldccgrbrwlh.omp",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1704

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1048-58-0x0000000076451000-0x0000000076453000-memory.dmp

        memory/1048-62-0x0000000000273000-0x0000000000274000-memory.dmp

        memory/1048-61-0x0000000000251000-0x0000000000273000-memory.dmp

        memory/1704-92-0x00000000026E1000-0x0000000002703000-memory.dmp

        memory/1704-93-0x0000000002A81000-0x0000000002AA3000-memory.dmp

        memory/1704-90-0x0000000002571000-0x0000000002593000-memory.dmp

        memory/1704-88-0x0000000002461000-0x0000000002483000-memory.dmp

        memory/1704-86-0x0000000000351000-0x0000000000373000-memory.dmp

        memory/1704-84-0x00000000002F1000-0x0000000000313000-memory.dmp

        memory/1740-80-0x0000000000211000-0x0000000000233000-memory.dmp

        memory/1756-54-0x000000002FED1000-0x000000002FED4000-memory.dmp

        memory/1756-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1756-55-0x0000000071AA1000-0x0000000071AA3000-memory.dmp

        memory/1788-76-0x0000000002611000-0x0000000002633000-memory.dmp

        memory/1788-74-0x00000000024F1000-0x0000000002513000-memory.dmp

        memory/1788-72-0x00000000023E1000-0x0000000002403000-memory.dmp

        memory/1788-70-0x0000000001ED1000-0x0000000001EF3000-memory.dmp

        memory/1788-68-0x0000000000341000-0x0000000000363000-memory.dmp

        memory/1788-66-0x00000000001E1000-0x0000000000203000-memory.dmp