Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    12/01/2022, 03:41

General

  • Target
    972d4586f9c5ca66b4d42756d4c3cacb.xls
  • Size 118KB
  • Sample220112-d8rtrsbbbj
  • SHA256 174ff5d09f0be20dfe363bdaeec30dcf984e0de64929abe14bf67e370cf78097
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

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

  • xlm40.dropper

    http://towardsun.net/admin/BYGGkrYAnT/

  • xlm40.dropper

    http://k-antiques.jp/wp-includes/SCYdA6TLohYk2/

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 3 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\972d4586f9c5ca66b4d42756d4c3cacb.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:540
    • 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:1996
      • 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:1824
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Htnouqv\rtcslhlf.mbe",WSDDwyEQ
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1704
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Htnouqv\rtcslhlf.mbe",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1760

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/540-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/540-55-0x00000000710B1000-0x00000000710B3000-memory.dmp

        memory/540-54-0x000000002F551000-0x000000002F554000-memory.dmp

        memory/1704-78-0x0000000000261000-0x0000000000283000-memory.dmp

        memory/1760-90-0x0000000002C21000-0x0000000002C43000-memory.dmp

        memory/1760-88-0x0000000002481000-0x00000000024A3000-memory.dmp

        memory/1760-86-0x0000000002421000-0x0000000002443000-memory.dmp

        memory/1760-84-0x0000000002381000-0x00000000023A3000-memory.dmp

        memory/1824-70-0x00000000009A1000-0x00000000009C3000-memory.dmp

        memory/1824-72-0x00000000024F1000-0x0000000002513000-memory.dmp

        memory/1824-74-0x00000000025F1000-0x0000000002613000-memory.dmp

        memory/1824-68-0x00000000007C1000-0x00000000007E3000-memory.dmp

        memory/1824-66-0x00000000002F1000-0x0000000000313000-memory.dmp

        memory/1996-61-0x00000000001E1000-0x0000000000203000-memory.dmp

        memory/1996-62-0x0000000000203000-0x0000000000204000-memory.dmp

        memory/1996-58-0x0000000076041000-0x0000000076043000-memory.dmp