Analysis

  • max time kernel
    150s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    12/01/2022, 04:42

General

  • Target
    9a472978cc338dd13256023b764c5d82.xls
  • Size 118KB
  • Sample220112-fbpdgsbbd4
  • SHA256 58c5a48579e8499ec3aa409ee960a020592e422516e0aaa2847880ca43f84e90
  • 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/

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\9a472978cc338dd13256023b764c5d82.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:1892
    • 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:756
      • 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:1988
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Iyaskc\nfspyprehkc.bmo",hJnAlM
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1080
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Iyaskc\nfspyprehkc.bmo",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:784

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/756-62-0x00000000001D3000-0x00000000001D4000-memory.dmp

        memory/756-61-0x00000000001B1000-0x00000000001D3000-memory.dmp

        memory/756-58-0x00000000751B1000-0x00000000751B3000-memory.dmp

        memory/784-82-0x00000000002A1000-0x00000000002C3000-memory.dmp

        memory/784-90-0x0000000002501000-0x0000000002523000-memory.dmp

        memory/784-88-0x00000000024A1000-0x00000000024C3000-memory.dmp

        memory/784-86-0x0000000000CD1000-0x0000000000CF3000-memory.dmp

        memory/784-84-0x0000000000301000-0x0000000000323000-memory.dmp

        memory/1080-78-0x0000000001CC1000-0x0000000001CE3000-memory.dmp

        memory/1892-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1892-54-0x000000002FDF1000-0x000000002FDF4000-memory.dmp

        memory/1892-55-0x0000000070E31000-0x0000000070E33000-memory.dmp

        memory/1988-72-0x0000000002421000-0x0000000002443000-memory.dmp

        memory/1988-74-0x0000000002711000-0x0000000002733000-memory.dmp

        memory/1988-70-0x0000000000A01000-0x0000000000A23000-memory.dmp

        memory/1988-68-0x0000000000471000-0x0000000000493000-memory.dmp

        memory/1988-66-0x0000000000211000-0x0000000000233000-memory.dmp