Analysis

  • max time kernel
    101s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    28-11-2022 02:38

General

  • Target

    3a23b954e2f6c61916e9b733fa17d94893452dcf07668f2cf3a8b697082a46d3.xls

  • Size

    111KB

  • MD5

    8399f63198333d9cc3b5237132ce4e49

  • SHA1

    97dc167eae08060b7ea8136c767de8c8c57c8035

  • SHA256

    3a23b954e2f6c61916e9b733fa17d94893452dcf07668f2cf3a8b697082a46d3

  • SHA512

    2275371dffb0d5e149a3d1fdf08a619731ef8183117816ad7d07f65171b22583ab323babca389d91903b22b9d294cb88583df5e01215ff445205512a3a4afa4f

  • SSDEEP

    1536:2tttBpRFBDEgBtieWnYHfZ2DnUt03g3IZ95BMqzmptHhWVbrzQ72zzTkiD2lkmYQ:KsMymp/WVbrzQ72/TkDamYRn/Kv4Ml

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\3a23b954e2f6c61916e9b733fa17d94893452dcf07668f2cf3a8b697082a46d3.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:944
    • 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:664
      • C:\Windows\SysWOW64\attrib.exe
        attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
        3⤵
        • Views/modifies file attributes
        PID:1268
    • 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:1460
    • 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:1500

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/664-65-0x0000000000000000-mapping.dmp
  • memory/944-54-0x000000002FFE1000-0x000000002FFE4000-memory.dmp
    Filesize

    12KB

  • memory/944-55-0x0000000071CD1000-0x0000000071CD3000-memory.dmp
    Filesize

    8KB

  • memory/944-56-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/944-57-0x0000000072CBD000-0x0000000072CC8000-memory.dmp
    Filesize

    44KB

  • memory/944-58-0x0000000076411000-0x0000000076413000-memory.dmp
    Filesize

    8KB

  • memory/944-69-0x0000000072CBD000-0x0000000072CC8000-memory.dmp
    Filesize

    44KB

  • memory/944-76-0x000000005FFF0000-0x0000000060000000-memory.dmp
    Filesize

    64KB

  • memory/944-77-0x0000000072CBD000-0x0000000072CC8000-memory.dmp
    Filesize

    44KB

  • memory/1268-68-0x0000000000000000-mapping.dmp
  • memory/1460-66-0x0000000000000000-mapping.dmp
  • memory/1500-67-0x0000000000000000-mapping.dmp