Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 19:56

General

  • Target
    e0b77c94246a20ec8d2a633c5aa226e2.xls
  • Size 113KB
  • Sample220111-ynp5nahcdm
  • SHA256 c415f6432a14864da8d7cd66dab9263599364b3b1d8b3fd13e4c725d1a0c4562
  • 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\e0b77c94246a20ec8d2a633c5aa226e2.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:1700
    • 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:1952
      • 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:1872
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Wthsiuj\yuaimpd.vcc",EOjdcjtn
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1540
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Wthsiuj\yuaimpd.vcc",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1388

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/1388-91-0x0000000002B41000-0x0000000002B63000-memory.dmp

        memory/1388-89-0x0000000000CD1000-0x0000000000CF3000-memory.dmp

        memory/1388-87-0x0000000000C31000-0x0000000000C53000-memory.dmp

        memory/1388-85-0x0000000000A71000-0x0000000000A93000-memory.dmp

        memory/1388-83-0x00000000006E1000-0x0000000000703000-memory.dmp

        memory/1700-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1700-56-0x0000000071511000-0x0000000071513000-memory.dmp

        memory/1700-55-0x000000002FFF1000-0x000000002FFF4000-memory.dmp

        memory/1872-71-0x00000000020E1000-0x0000000002103000-memory.dmp

        memory/1872-73-0x0000000002551000-0x0000000002573000-memory.dmp

        memory/1872-75-0x0000000002611000-0x0000000002633000-memory.dmp

        memory/1872-69-0x0000000000B91000-0x0000000000BB3000-memory.dmp

        memory/1872-67-0x0000000000281000-0x00000000002A3000-memory.dmp

        memory/1952-62-0x00000000005E1000-0x0000000000603000-memory.dmp

        memory/1952-63-0x0000000000603000-0x0000000000604000-memory.dmp

        memory/1952-59-0x0000000075F91000-0x0000000075F93000-memory.dmp