Analysis

  • max time kernel
    101s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2022 23:13

General

  • Target

    ca8f4d8669cd97c9806fb591f1035100c64cfe3817a498dd9d22e930f740904f.xls

  • Size

    91KB

  • MD5

    3b8aa48fb6601c72b3c4e1466d99b0cc

  • SHA1

    e4722f2a392a725473d6ac692284238451ce348a

  • SHA256

    ca8f4d8669cd97c9806fb591f1035100c64cfe3817a498dd9d22e930f740904f

  • SHA512

    d94f2ec42a4c3f720f712a8d6d446e78307e57a885a829172b446fb1369bb79863bd318064fef8d0bd48518d3b7cfbd7213a65295eec3f2e18edacc4996fbf32

  • SSDEEP

    1536:WqqqeniphhWVbrtkzEleQ7ITkR62lzIhY7nJdJoOd7cJaXwRCM2M/MGwb:RWVbrjQQ7ITk9a2AJaXwX5kDb

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\ca8f4d8669cd97c9806fb591f1035100c64cfe3817a498dd9d22e930f740904f.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:900
    • 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:976
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1696
    • 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:1084
    • 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:1756

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/900-54-0x000000002F4D1000-0x000000002F4D4000-memory.dmp
    Filesize

    12KB

  • memory/900-55-0x00000000713D1000-0x00000000713D3000-memory.dmp
    Filesize

    8KB

  • memory/900-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/900-57-0x00000000723BD000-0x00000000723C8000-memory.dmp
    Filesize

    44KB

  • memory/900-58-0x0000000076121000-0x0000000076123000-memory.dmp
    Filesize

    8KB

  • memory/900-383-0x00000000723BD000-0x00000000723C8000-memory.dmp
    Filesize

    44KB

  • memory/900-384-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/900-385-0x00000000723BD000-0x00000000723C8000-memory.dmp
    Filesize

    44KB

  • memory/976-219-0x0000000000000000-mapping.dmp
  • memory/1084-220-0x0000000000000000-mapping.dmp
  • memory/1696-222-0x0000000000000000-mapping.dmp
  • memory/1756-221-0x0000000000000000-mapping.dmp