Analysis

  • max time kernel
    105s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2022 14:54

General

  • Target

    a9df59ece2c155b659d0bf0e12fc6a76eaecb6e323dca94684192d7c2de82418.xls

  • Size

    99KB

  • MD5

    b083d61cd40856951cbc832210e9925c

  • SHA1

    a39e442b8b75da88703f916eab5c1c3b9267e3a6

  • SHA256

    a9df59ece2c155b659d0bf0e12fc6a76eaecb6e323dca94684192d7c2de82418

  • SHA512

    a0b947ce5e091b2e5d34d699d40a46cbaa04e0dd8b326c4275e5c9a8875b989d9f46ae6c1a8608e0428932aa578d62f43271cf95ec941e19d95cad0825e79675

  • SSDEEP

    1536:Xxxx9xvsDySU1QHWVbrz7On7ITkiD2KcCORNWEIunyJM2M/MVXbZA:cTWVbrz7m7ITkDXD9nv5kNbZA

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\a9df59ece2c155b659d0bf0e12fc6a76eaecb6e323dca94684192d7c2de82418.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:1492
    • 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:1780
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1568
    • 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:288
    • 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:1952

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/288-220-0x0000000000000000-mapping.dmp
  • memory/1492-54-0x000000002F031000-0x000000002F034000-memory.dmp
    Filesize

    12KB

  • memory/1492-55-0x0000000071CA1000-0x0000000071CA3000-memory.dmp
    Filesize

    8KB

  • memory/1492-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1492-57-0x0000000072C8D000-0x0000000072C98000-memory.dmp
    Filesize

    44KB

  • memory/1492-58-0x0000000076BA1000-0x0000000076BA3000-memory.dmp
    Filesize

    8KB

  • memory/1492-383-0x0000000072C8D000-0x0000000072C98000-memory.dmp
    Filesize

    44KB

  • memory/1492-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1492-385-0x0000000072C8D000-0x0000000072C98000-memory.dmp
    Filesize

    44KB

  • memory/1568-222-0x0000000000000000-mapping.dmp
  • memory/1780-219-0x0000000000000000-mapping.dmp
  • memory/1952-221-0x0000000000000000-mapping.dmp