Analysis

  • max time kernel
    104s
  • max time network
    49s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    25-11-2022 19:26

General

  • Target

    答辩16日第3组.xls

  • Size

    101KB

  • MD5

    a5e3491502361d5b7b742d962149e421

  • SHA1

    89910d498602555ea868761799144ef81d2c6579

  • SHA256

    07c0028a034ce65872090bab7c9bf48d0f468665eef1ad494a4cd734220d7212

  • SHA512

    6f9462733ab45ce9986e293db3192000bffd9b204733a988701a3bfa25bdc7def3e0f71aca69cebf4b4a2992f6d464ed79ac01a7760957bd989f9ccb008ee1f5

  • SSDEEP

    1536:1iiiG42R3ulqi9WVbrzQ7lSWTkR62lGM88DcJtXwRsM2M/MZyd6S:lEWVbrzQ7BTk9tjYJtXwJ5ksd/

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\答辩16日第3组.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:1600
    • 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:1740
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:820
    • 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:764
    • 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:788

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/764-220-0x0000000000000000-mapping.dmp
  • memory/788-221-0x0000000000000000-mapping.dmp
  • memory/820-222-0x0000000000000000-mapping.dmp
  • memory/1600-54-0x000000002FD71000-0x000000002FD74000-memory.dmp
    Filesize

    12KB

  • memory/1600-55-0x0000000071341000-0x0000000071343000-memory.dmp
    Filesize

    8KB

  • memory/1600-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1600-57-0x000000007232D000-0x0000000072338000-memory.dmp
    Filesize

    44KB

  • memory/1600-58-0x0000000076461000-0x0000000076463000-memory.dmp
    Filesize

    8KB

  • memory/1600-383-0x000000007232D000-0x0000000072338000-memory.dmp
    Filesize

    44KB

  • memory/1600-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/1600-385-0x000000007232D000-0x0000000072338000-memory.dmp
    Filesize

    44KB

  • memory/1740-219-0x0000000000000000-mapping.dmp