Analysis

  • max time kernel
    102s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    29-01-2023 14:41

General

  • Target

    c4df19f47d8bda76a27c8f8f2f2ad8586429ccc86f1652108a9b0d854ea13fa2.xls

  • Size

    123KB

  • MD5

    bf3e976cbc71a2172053089db68da2ee

  • SHA1

    aebfc671ad1ca8232fcd15b493d8dd63fb4090f3

  • SHA256

    c4df19f47d8bda76a27c8f8f2f2ad8586429ccc86f1652108a9b0d854ea13fa2

  • SHA512

    06c12661aa88e93f7e0f712a7554327051c00ecee6137c45ffcab2d114de0c7849363b7c0f0bc309b87b8ecf13456486ca55654caa0f6621201e7b3bc3cd5137

  • SSDEEP

    1536:3V555YOSSqGYQxA4dJyNdBBCQItWVbrzVih8h7ITkbA23cCOU/WwF18krSL:MGYHgMWWVbrz4S7ITkZsDW9rO

Score
10/10

Malware Config

Signatures

  • Process spawned unexpected child process 3 IoCs

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

  • Deletes itself 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • Views/modifies file attributes 1 TTPs 1 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\c4df19f47d8bda76a27c8f8f2f2ad8586429ccc86f1652108a9b0d854ea13fa2.xls
    1⤵
    • Deletes itself
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • NTFS ADS
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: RenamesItself
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1292
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:1712
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1620
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
      2⤵
      • Process spawned unexpected child process
      PID:700
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
      2⤵
      • Process spawned unexpected child process
      PID:1156

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Hidden Files and Directories

1
T1158

Defense Evasion

Modify Registry

1
T1112

Hidden Files and Directories

1
T1158

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/700-220-0x0000000000000000-mapping.dmp
  • memory/1156-221-0x0000000000000000-mapping.dmp
  • memory/1292-54-0x000000002F211000-0x000000002F214000-memory.dmp
    Filesize

    12KB

  • memory/1292-55-0x0000000071071000-0x0000000071073000-memory.dmp
    Filesize

    8KB

  • memory/1292-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1292-57-0x00000000759C1000-0x00000000759C3000-memory.dmp
    Filesize

    8KB

  • memory/1292-58-0x000000007205D000-0x0000000072068000-memory.dmp
    Filesize

    44KB

  • memory/1292-383-0x000000007205D000-0x0000000072068000-memory.dmp
    Filesize

    44KB

  • memory/1292-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1292-385-0x000000007205D000-0x0000000072068000-memory.dmp
    Filesize

    44KB

  • memory/1620-222-0x0000000000000000-mapping.dmp
  • memory/1712-219-0x0000000000000000-mapping.dmp