Analysis

  • max time kernel
    4294210s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20220310-en
  • submitted
    29/03/2022, 19:54

General

  • Target
    0e2432b9416099c2ab1e5c1e5e71f1a2.xls
  • Size 106KB
  • Sample220329-ymjaqaefdl
  • SHA256 c52e93e91b5d59d300c8514569b22a800531880de8cf3da12f3bf4166ebb3781
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    http://fccatinsaat.com/wp-content/Cw3aR6792f/

  • xlm40.dropper

    http://fabulouswebdesign.net/invoice/m/

  • xlm40.dropper

    http://freemanylaluz.com/downloads/8dR9pgNBFtz/

  • xlm40.dropper

    https://freewebsitedirectory.com/wp-includes/v2qFAlMZELRkxbz/

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • 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 use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 7 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\0e2432b9416099c2ab1e5c1e5e71f1a2.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:1808
    • C:\Windows\SysWow64\regsvr32.exe
      C:\Windows\SysWow64\regsvr32.exe -s ..\nhth.dll
      2⤵
      • Process spawned unexpected child process
      PID:1980

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        nhth.dll

        • Path C:\Users\Admin\nhth.dll
        • Size 7KB
        • SHA256 fd8877a57a8254b127735a93cce1fc0d5ae7d071b135d0389048a6eb725e54d1
        • MD5 SHA1 SHA512

        memory/1808-54-0x000000002F051000-0x000000002F054000-memory.dmp

        memory/1808-55-0x0000000071441000-0x0000000071443000-memory.dmp

        memory/1808-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1808-57-0x000000007242D000-0x0000000072438000-memory.dmp

        memory/1980-59-0x00000000760A1000-0x00000000760A3000-memory.dmp