Analysis

  • max time kernel
    131s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    26-11-2022 03:09

General

  • Target

    77e581f9d9191f8951bd420cb8fafed722f3372ff2d8769e664b8426052ae34a.xls

  • Size

    246KB

  • MD5

    c591ed07be8898f0ab488c72ea660a97

  • SHA1

    e57f6fab9a16e3646d428e47e21e4decf4dd9640

  • SHA256

    77e581f9d9191f8951bd420cb8fafed722f3372ff2d8769e664b8426052ae34a

  • SHA512

    fc9efce0ea4ca2b4c5e151b6be812b9bacafe0e894904a8187b6d45249a409b9af5e059d18d469b271bee7e7546be61d881ba631ce850dee5f069c2c0e7aa82c

  • SSDEEP

    3072:16d9cOrhYxL6R4X29mBHb1AURKf7wWVbrE7ITk9SAJtXwY4NZ:16d9cOViHpbRKf7Ww

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 5 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\77e581f9d9191f8951bd420cb8fafed722f3372ff2d8769e664b8426052ae34a.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:844
    • 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:1904
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:536
    • 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:1688
    • 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:340

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/340-221-0x0000000000000000-mapping.dmp
  • memory/536-222-0x0000000000000000-mapping.dmp
  • memory/844-54-0x000000002FE01000-0x000000002FE04000-memory.dmp
    Filesize

    12KB

  • memory/844-55-0x0000000071141000-0x0000000071143000-memory.dmp
    Filesize

    8KB

  • memory/844-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/844-57-0x000000007212D000-0x0000000072138000-memory.dmp
    Filesize

    44KB

  • memory/844-58-0x0000000074F01000-0x0000000074F03000-memory.dmp
    Filesize

    8KB

  • memory/844-223-0x000000007212D000-0x0000000072138000-memory.dmp
    Filesize

    44KB

  • memory/844-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/844-385-0x000000007212D000-0x0000000072138000-memory.dmp
    Filesize

    44KB

  • memory/1688-220-0x0000000000000000-mapping.dmp
  • memory/1904-219-0x0000000000000000-mapping.dmp