Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 11:25

General

  • Target
    b4b963f8b1b93344fbe3f4aca8a626a4.xls
  • Size 113KB
  • Sample220111-njajasffdr
  • SHA256 93f2d3c86229e3bcb68a7d438023c3d13faab8d441501184deae4191276d2901
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    http://gaidov.bg/wp-includes/Ug/

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\b4b963f8b1b93344fbe3f4aca8a626a4.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:288
    • 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:864
      • 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:1992
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cndsugphckhyg\ethxmnfzdiomfp.kog",XWKOYzX
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1656
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cndsugphckhyg\ethxmnfzdiomfp.kog",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:552

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/288-54-0x00000000716D1000-0x00000000716D3000-memory.dmp

        memory/288-55-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/288-53-0x000000002FB21000-0x000000002FB24000-memory.dmp

        memory/552-85-0x0000000000341000-0x0000000000364000-memory.dmp

        memory/552-95-0x00000000029F1000-0x0000000002A14000-memory.dmp

        memory/552-93-0x00000000025D1000-0x00000000025F4000-memory.dmp

        memory/552-91-0x00000000024F1000-0x0000000002514000-memory.dmp

        memory/552-89-0x00000000023A1000-0x00000000023C4000-memory.dmp

        memory/552-87-0x0000000000AD1000-0x0000000000AF4000-memory.dmp

        memory/864-60-0x0000000010001000-0x0000000010024000-memory.dmp

        memory/864-57-0x0000000075D61000-0x0000000075D63000-memory.dmp

        memory/864-61-0x0000000010024000-0x0000000010025000-memory.dmp

        memory/1992-67-0x0000000000391000-0x00000000003B4000-memory.dmp

        memory/1992-75-0x0000000002461000-0x0000000002484000-memory.dmp

        memory/1992-73-0x0000000002401000-0x0000000002424000-memory.dmp

        memory/1992-71-0x0000000002361000-0x0000000002384000-memory.dmp

        memory/1992-69-0x00000000009C1000-0x00000000009E4000-memory.dmp