Analysis

  • max time kernel
    151s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    12/01/2022, 04:26

General

  • Target
    2c468cb35107e763206cccde6e2f22c7.xls
  • Size 118KB
  • Sample220112-e2h4qabah9
  • SHA256 1e8ed8d61ad3f66e9acac149db12bf6f3db13cef81cbedc8bf9602c391450c43
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/

  • xlm40.dropper

    http://towardsun.net/admin/BYGGkrYAnT/

  • xlm40.dropper

    http://k-antiques.jp/wp-includes/SCYdA6TLohYk2/

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\2c468cb35107e763206cccde6e2f22c7.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:1704
    • 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:1788
      • 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:1044
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Bwaiszzhry\rirqtcmnqglfhfo.nac",xqIF
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1736
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Bwaiszzhry\rirqtcmnqglfhfo.nac",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1752

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1044-68-0x00000000005E1000-0x0000000000603000-memory.dmp

        memory/1044-72-0x0000000002111000-0x0000000002133000-memory.dmp

        memory/1044-74-0x00000000022F1000-0x0000000002313000-memory.dmp

        memory/1044-70-0x0000000001FE1000-0x0000000002003000-memory.dmp

        memory/1044-66-0x00000000001A1000-0x00000000001C3000-memory.dmp

        memory/1704-55-0x0000000071011000-0x0000000071013000-memory.dmp

        memory/1704-54-0x000000002F0D1000-0x000000002F0D4000-memory.dmp

        memory/1704-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1736-78-0x00000000001B1000-0x00000000001D3000-memory.dmp

        memory/1752-82-0x00000000002B1000-0x00000000002D3000-memory.dmp

        memory/1752-84-0x0000000000491000-0x00000000004B3000-memory.dmp

        memory/1752-86-0x0000000000A41000-0x0000000000A63000-memory.dmp

        memory/1752-88-0x00000000024E1000-0x0000000002503000-memory.dmp

        memory/1752-90-0x0000000002CE1000-0x0000000002D03000-memory.dmp

        memory/1788-58-0x0000000075601000-0x0000000075603000-memory.dmp

        memory/1788-62-0x0000000000213000-0x0000000000214000-memory.dmp

        memory/1788-61-0x00000000001F1000-0x0000000000213000-memory.dmp