Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 14:33

General

  • Target
    8265dd4b61ddb2dc2ffedcce885f56c3.xls
  • Size 113KB
  • Sample220111-rwvxjsgbhn
  • SHA256 f5f396e71e90d6098cfb4e727f15f69161c77765936b2460da751ffca6a43955
  • 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\8265dd4b61ddb2dc2ffedcce885f56c3.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:1536
    • 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:480
      • 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:1588
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Nqprryxblrftm\uysiexmlsjpo.vdt",bayMixnLkVALDs
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1688
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Nqprryxblrftm\uysiexmlsjpo.vdt",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:568

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/480-61-0x0000000010001000-0x0000000010024000-memory.dmp

        memory/480-58-0x0000000076C91000-0x0000000076C93000-memory.dmp

        memory/480-62-0x0000000010024000-0x0000000010025000-memory.dmp

        memory/568-86-0x0000000000331000-0x0000000000354000-memory.dmp

        memory/568-94-0x0000000002571000-0x0000000002594000-memory.dmp

        memory/568-92-0x0000000002381000-0x00000000023A4000-memory.dmp

        memory/568-90-0x0000000000E11000-0x0000000000E34000-memory.dmp

        memory/568-88-0x0000000000931000-0x0000000000954000-memory.dmp

        memory/1536-54-0x000000002F321000-0x000000002F324000-memory.dmp

        memory/1536-55-0x0000000071C21000-0x0000000071C23000-memory.dmp

        memory/1536-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1588-68-0x00000000004A1000-0x00000000004C4000-memory.dmp

        memory/1588-76-0x0000000002511000-0x0000000002534000-memory.dmp

        memory/1588-74-0x0000000000F41000-0x0000000000F64000-memory.dmp

        memory/1588-72-0x0000000000E91000-0x0000000000EB4000-memory.dmp

        memory/1588-70-0x0000000000591000-0x00000000005B4000-memory.dmp