Analysis

  • max time kernel
    150s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 16:23

General

  • Target
    a8bf3641c46be3f0accc6b55370ecf29.xls
  • Size 118KB
  • Sample220111-tvsrxagcd9
  • SHA256 2f80ecbe8f3eb45c354fb36640dc4be6b13064be8550f2d49e41090e5c113b72
  • 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 5 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\a8bf3641c46be3f0accc6b55370ecf29.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:1592
    • 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:1080
      • 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:1100
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Ccycezu\zjcuoimcqutrx.lau",zJBpfFLTEGaU
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2004
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Ccycezu\zjcuoimcqutrx.lau",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1760

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/1080-60-0x00000000004C1000-0x00000000004E3000-memory.dmp

        memory/1080-57-0x0000000075D51000-0x0000000075D53000-memory.dmp

        memory/1080-61-0x00000000004E3000-0x00000000004E4000-memory.dmp

        memory/1100-67-0x0000000001E41000-0x0000000001E63000-memory.dmp

        memory/1100-65-0x0000000000291000-0x00000000002B3000-memory.dmp

        memory/1100-69-0x00000000023E1000-0x0000000002403000-memory.dmp

        memory/1100-71-0x00000000024E1000-0x0000000002503000-memory.dmp

        memory/1100-73-0x0000000002541000-0x0000000002563000-memory.dmp

        memory/1592-55-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1592-53-0x000000002F741000-0x000000002F744000-memory.dmp

        memory/1592-54-0x0000000071B51000-0x0000000071B53000-memory.dmp

        memory/1760-81-0x0000000000261000-0x0000000000283000-memory.dmp

        memory/1760-83-0x0000000000931000-0x0000000000953000-memory.dmp

        memory/1760-85-0x00000000023A1000-0x00000000023C3000-memory.dmp

        memory/1760-87-0x0000000002671000-0x0000000002693000-memory.dmp

        memory/1760-89-0x0000000002731000-0x0000000002753000-memory.dmp

        memory/1760-92-0x0000000002B71000-0x0000000002B93000-memory.dmp