Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 17:07

General

  • Target
    1b65d20cdf25ceebefbb478343160ed8.xls
  • Size 113KB
  • Sample220111-vmze6agfdn
  • SHA256 c5850b16a368ab7c8f2d03cebcc7dd51173a704cdd1d6c105ba43083a40b6063
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

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

  • xlm40.dropper

    http://studiokrishnaproduction.com/wp-includes/3mJ/

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\1b65d20cdf25ceebefbb478343160ed8.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:308
    • 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:1212
      • 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:1964
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Jbapmxkpefdondti\rydwxxfclcbvkb.elv",lXDfydiz
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1496
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Jbapmxkpefdondti\rydwxxfclcbvkb.elv",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1764

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/308-55-0x0000000071C41000-0x0000000071C43000-memory.dmp

        memory/308-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/308-54-0x000000002F981000-0x000000002F984000-memory.dmp

        memory/1212-58-0x0000000076491000-0x0000000076493000-memory.dmp

        memory/1212-62-0x0000000000283000-0x0000000000284000-memory.dmp

        memory/1212-61-0x0000000000261000-0x0000000000283000-memory.dmp

        memory/1496-78-0x0000000000231000-0x0000000000253000-memory.dmp

        memory/1764-82-0x0000000000411000-0x0000000000433000-memory.dmp

        memory/1764-84-0x00000000007E1000-0x0000000000803000-memory.dmp

        memory/1764-86-0x0000000000891000-0x00000000008B3000-memory.dmp

        memory/1764-88-0x0000000000941000-0x0000000000963000-memory.dmp

        memory/1764-90-0x0000000002B21000-0x0000000002B43000-memory.dmp

        memory/1964-70-0x0000000001F11000-0x0000000001F33000-memory.dmp

        memory/1964-72-0x0000000002381000-0x00000000023A3000-memory.dmp

        memory/1964-74-0x0000000002481000-0x00000000024A3000-memory.dmp

        memory/1964-68-0x00000000005B1000-0x00000000005D3000-memory.dmp

        memory/1964-66-0x00000000001F1000-0x0000000000213000-memory.dmp