Analysis

  • max time kernel
    146s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    28-11-2022 01:15

General

  • Target

    a30b5d550915a8aae62a985a087df140be24c665c6d8977b38ac072f8c822fa0.xls

  • Size

    147KB

  • MD5

    89931447b43c20e47cf5d5a56ce8871f

  • SHA1

    2a799346033124326fde9ec344220d48c9760165

  • SHA256

    a30b5d550915a8aae62a985a087df140be24c665c6d8977b38ac072f8c822fa0

  • SHA512

    90d6709943a73d670b7babe1b591418ab26a8add04aeef19758f0bad59e0f91ffd478456e49dbd03dfd117214a16daa8bf31214ed74229a4d20364a1028a4b8c

  • SSDEEP

    1536:OeeeqsaebRowWiL8O820MVKWVbrzQ7IzKK5kbA23FkI/cJtXwqpa87237ZIDEE:rbRfb8uoWVbrzQ7IWskZWIEJtXwLODv

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\a30b5d550915a8aae62a985a087df140be24c665c6d8977b38ac072f8c822fa0.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:2036
    • 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:1448
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1552
    • 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:1692
    • 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:364

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/364-61-0x0000000000000000-mapping.dmp
  • memory/1448-59-0x0000000000000000-mapping.dmp
  • memory/1552-62-0x0000000000000000-mapping.dmp
  • memory/1692-60-0x0000000000000000-mapping.dmp
  • memory/2036-54-0x000000002FCB1000-0x000000002FCB4000-memory.dmp
    Filesize

    12KB

  • memory/2036-55-0x0000000071B81000-0x0000000071B83000-memory.dmp
    Filesize

    8KB

  • memory/2036-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2036-57-0x0000000072B6D000-0x0000000072B78000-memory.dmp
    Filesize

    44KB

  • memory/2036-58-0x00000000760B1000-0x00000000760B3000-memory.dmp
    Filesize

    8KB

  • memory/2036-63-0x0000000072B6D000-0x0000000072B78000-memory.dmp
    Filesize

    44KB

  • memory/2036-64-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/2036-65-0x0000000072B6D000-0x0000000072B78000-memory.dmp
    Filesize

    44KB