Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 21:46

General

  • Target
    69701651bb9f3fa79939add57b80af9b.xls
  • Size 118KB
  • Sample220111-1mlrysheb7
  • SHA256 e7065618e785e98792d570656fd412ecf695c45ec5a8123d04cf4ee302d225bf
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

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

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\69701651bb9f3fa79939add57b80af9b.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:1412
    • 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:1180
      • 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:408
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cvckpglctfntxwv\dllrtcwl.uwe",aVUeLNEoqIVa
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1812
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cvckpglctfntxwv\dllrtcwl.uwe",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:604

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/408-69-0x0000000000311000-0x0000000000333000-memory.dmp

        memory/408-73-0x0000000002201000-0x0000000002223000-memory.dmp

        memory/408-77-0x0000000002771000-0x0000000002793000-memory.dmp

        memory/408-75-0x00000000026D1000-0x00000000026F3000-memory.dmp

        memory/408-71-0x0000000000C61000-0x0000000000C83000-memory.dmp

        memory/408-67-0x00000000002B1000-0x00000000002D3000-memory.dmp

        memory/604-94-0x0000000002B11000-0x0000000002B33000-memory.dmp

        memory/604-93-0x0000000002541000-0x0000000002563000-memory.dmp

        memory/604-91-0x0000000002491000-0x00000000024B3000-memory.dmp

        memory/604-89-0x0000000001E91000-0x0000000001EB3000-memory.dmp

        memory/604-87-0x0000000001C81000-0x0000000001CA3000-memory.dmp

        memory/604-85-0x0000000000471000-0x0000000000493000-memory.dmp

        memory/1180-62-0x00000000002E1000-0x0000000000303000-memory.dmp

        memory/1180-59-0x0000000076851000-0x0000000076853000-memory.dmp

        memory/1180-63-0x0000000000303000-0x0000000000304000-memory.dmp

        memory/1412-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1412-56-0x0000000071B61000-0x0000000071B63000-memory.dmp

        memory/1412-55-0x000000002F9F1000-0x000000002F9F4000-memory.dmp