Analysis

  • max time kernel
    150s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11-01-2022 16:16

General

  • Target

    1c2c9ed8859bf774c091debcdb228795.xls

  • Size

    118KB

  • MD5

    1c2c9ed8859bf774c091debcdb228795

  • SHA1

    c4440f6be0a350228488ccc079783176d3383d04

  • SHA256

    7dcde20dd26c5388d734d658830ebb48bf5c1170cf9ec39a3e084d8e728715e8

  • SHA512

    a064ca499ae09cb45a8c590d88cb65fc7d38a2ca9bc7c53c7c8cc2f58a79e09480d2a51d3eac32941d9f2028dbba8274a58dfd04987de4417c2653d42ed8df79

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.

  • suricata: ET MALWARE W32/Emotet CnC Beacon 3

    suricata: ET MALWARE W32/Emotet CnC Beacon 3

  • 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\1c2c9ed8859bf774c091debcdb228795.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:1612
    • 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:952
      • 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:1220
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Ndgxgsw\iznujtzgfcz.tya",YSCIc
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1720
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Ndgxgsw\iznujtzgfcz.tya",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1632

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/952-61-0x0000000000291000-0x00000000002B3000-memory.dmp

    Filesize

    136KB

  • memory/952-58-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

    Filesize

    8KB

  • memory/952-62-0x00000000002B3000-0x00000000002B4000-memory.dmp

    Filesize

    4KB

  • memory/1220-68-0x0000000000441000-0x0000000000463000-memory.dmp

    Filesize

    136KB

  • memory/1220-72-0x0000000002531000-0x0000000002553000-memory.dmp

    Filesize

    136KB

  • memory/1220-74-0x00000000025E1000-0x0000000002603000-memory.dmp

    Filesize

    136KB

  • memory/1220-66-0x00000000001F1000-0x0000000000213000-memory.dmp

    Filesize

    136KB

  • memory/1220-70-0x0000000002361000-0x0000000002383000-memory.dmp

    Filesize

    136KB

  • memory/1612-54-0x000000002F721000-0x000000002F724000-memory.dmp

    Filesize

    12KB

  • memory/1612-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

    Filesize

    64KB

  • memory/1612-55-0x0000000070F21000-0x0000000070F23000-memory.dmp

    Filesize

    8KB

  • memory/1632-82-0x00000000001E1000-0x0000000000203000-memory.dmp

    Filesize

    136KB

  • memory/1632-84-0x0000000000431000-0x0000000000453000-memory.dmp

    Filesize

    136KB

  • memory/1632-86-0x00000000007F1000-0x0000000000813000-memory.dmp

    Filesize

    136KB

  • memory/1632-88-0x0000000002411000-0x0000000002433000-memory.dmp

    Filesize

    136KB

  • memory/1720-78-0x00000000001B1000-0x00000000001D3000-memory.dmp

    Filesize

    136KB